2515:
25:
712:
directly to the data elements. But this approach will negatively impact the iterator performance, since it must effectuate a double pointer following to access the actual data element. This is usually not desirable, because many algorithms using the iterators invoke the iterators data access operation more often than the advance method. It is therefore especially important to have iterators with very efficient data access.
2046:
This approach does not properly separate the advance operation from the actual data access. If the data element must be used more than once for each advance, it needs to be stored in a temporary variable. When an advance is needed without data access (i.e. to skip a given data element), the access is
1424:
Iterator types are separate from the container types they are used with, though the two are often used in concert. The category of the iterator (and thus the operations defined for it) usually depends on the type of container, with for instance arrays or vectors providing random access iterators, but
715:
All in all, this is always a trade-off between security (iterators remain always valid) and efficiency. Most of the time, the added security is not worth the efficiency price to pay for it. Using an alternative collection (for example a singly linked list instead of a vector) would be a better choice
711:
An alternative way to keep the number of updates bound relatively to the collection size would be to use a kind of handle mechanism, that is a collection of indirect pointers to the collection's elements that must be updated with the collection, and let the iterators point to these handles instead of
707:
For collections that may move around their data in memory, the only way to not invalidate the iterator is, for the collection, to somehow keep track of all the currently alive iterators and update them on the fly. Since the number of iterators at a given time may be arbitrarily large in comparison to
5183:
An internal iterator is implemented by the member functions of the class which has the iteration logic. An external iterator is implemented by a separate class which can be attached to the object which has iteration logic. The advantage of external iterator is that, many iterators can be made active
1177:
needed to transform the lower limit into the upper one, equals the number of items in the designated range; the number of distinct iterator values involved is one more than that. By convention, the lower limiting iterator "points to" the first element in the range, while the upper limiting iterator
5321:
An index only can be used for containers that (efficiently) support random access (i.e. direct access to an element at a given position). An iterator is a more general concept. Iterators offer efficient traversal of linked lists, files, and a number of other data structures. It often leads to the
4395:
Ruby implements iterators quite differently; all iterations are done by means of passing callback closures to container methods - this way Ruby not only implements basic iteration but also several patterns of iteration like function mapping, filters and reducing. Ruby also supports an alternative
2473:
Alternatively, it may be desirable to abstract the mechanisms of the array storage container from the user by defining a custom object-oriented MATLAB implementation of the
Iterator Pattern. Such an implementation supporting external iteration is demonstrated in MATLAB Central File Exchange item
694:
An iterator may allow the collection object to be modified without invalidating the iterator. For instance, once an iterator has advanced beyond the first element it may be possible to insert additional elements into the beginning of the collection with predictable results. With indexing this is
1456:
that modify the structure of the container itself; these are methods of the container class, but in addition require one or more iterator values to specify the desired operation. While it is possible to have multiple iterators pointing into the same container simultaneously, structure-modifying
703:
programming, where the interrelationships between objects and the effects of operations may not be obvious. By using an iterator one is isolated from these sorts of consequences. This assertion must however be taken with a grain of salt, because more often than not, for efficiency reasons, the
2333:
In the case of internal iteration where the user can supply an operation to the iterator to perform over every element of a collection, many built-in operators and MATLAB functions are overloaded to execute over every element of an array and return a corresponding output array implicitly.
2253:
object provides implicit conversions to do this. Implicit conversions are a feature of Scala: methods that, when visible in the current scope, automatically insert calls to themselves into relevant expressions at the appropriate place to make them typecheck when they otherwise would not.
1437:, and yet another type is provided for "reverse iterators", whose operations are defined in such a way that an algorithm performing a usual (forward) traversal will actually do traversal in reverse order when called with reverse iterators. Most containers also provide a separate
1150:, in order of increasing possibilities. All of the standard container template types provide iterators of one of these categories. Iterators generalize pointers to elements of an array (which indeed can be used as iterators), and their syntax is designed to resemble that of
236:
values to its caller multiple times, instead of returning just once. Most iterators are naturally expressible as generators, but because generators preserve their local state between invocations, they're particularly well-suited for complicated, stateful iterators, such as
645:β they provide a potentially infinite iterable (but not necessarily indexable) object. Several languages, such as Perl and Python, implement streams as iterators. In Python, iterators are objects representing streams of data. Alternative implementations of stream include
594:
This iteration style is sometimes called "internal iteration" because its code fully executes within the context of the iterable object (that controls all aspects of iteration), and the programmer only provides the operation to execute at each step (using an
3967:, which allows for a finer operation of iteration in several contexts such as adding or eliminating items, or skipping over them to access other items. Thus, any user-defined class can support standard iteration by composing these roles and implementing the
1457:
operations may invalidate certain iterator values (the standard specifies for each case whether this may be so); using an invalidated iterator is an error that will lead to undefined behavior, and such errors need not be signaled by the run time system.
190:
An iterator allows a consumer to process each element of a collection while isolating the consumer from the internal structure of the collection. The collection can store elements in any manner while the consumer can access them as a sequence.
1172:
Traversal using iterators usually involves a single varying iterator, and two fixed iterators that serve to delimit a range to be traversed. The distance between the limiting iterators, in terms of the number of applications of the operator
2269:
arrays. In the case of external iteration where the onus is on the user to advance the traversal and request next elements, one can define a set of elements within an array storage structure and traverse the elements using the
5099:
A user-defined iterator usually takes the form of a code reference that, when executed, calculates the next item in a list and returns it. When the iterator reaches the end of the list, it returns an agreed-upon
2054:
method of the iterator removes the most recently visited element from the container while keeping the iterator usable. Adding or removing elements by calling the methods of the container (also from the same
187:). It also provides for creation and initialization to a first element and indicates whether all elements have been traversed. In some programming contexts, an iterator provides additional functionality.
194:
In object-oriented programming, an iterator class is usually designed in tight coordination with the corresponding collection class. Usually, the collection provides the methods for creating iterators.
3137:
constant allows PHP scripts to iterate result sets with billions of rows with very little memory usage. These features are not exclusive to PHP nor to its MySQL class implementations (e.g. the
688:
Iterators can provide a consistent way to iterate on data structures of all kinds, and therefore make the code more readable, reusable, and less sensitive to a change in the data structure.
5477:
2532:
was introduced in version 4.0 and made compatible with objects as values in 4.0 Beta 4. However, support for iterators was added in PHP 5 through the introduction of the internal
1425:
sets (which use a linked structure as implementation) only providing bidirectional iterators. One same container type can have more than one associated iterator type; for instance the
1122:" statement to produce a sequence of elements instead of returning an object instance, will be transformed by the compiler into a new class implementing the appropriate interface.
1735:
syntax can be used to specify to operation to be iterated inline, avoiding the need to define a named function. Here is an example of for-each iteration using a lambda function:
691:
An iterator can enforce additional restrictions on access, such as ensuring that elements cannot be skipped or that a previously visited element cannot be accessed a second time.
3825:
Iterators however can be used and defined explicitly. For any iterable type, there are several methods that control different aspects of the iteration process. For example, the
2199:, iterators have a rich set of methods similar to collections, and can be used directly in for loops. Indeed, both iterators and collections inherit from a common base trait -
5584:
C# 8.0 and .NET Core 3.0 β Modern Cross-Platform
Development: Build Applications with C#, .NET Core, Entity Framework Core, ASP.NET Core, and ML.NET Using Visual Studio Code
1489:, that define the range over which iteration occurs. But no explicit iterator object is subsequently exposed as the iteration proceeds. This example shows the use of
2078:
with a similar API but that allows forward and backward iteration, provides its current index in the list and allows setting of the list element at its position.
3289:
types support iteration, as well as many classes that are part of the standard library. The following example shows typical implicit iteration over a sequence:
627:. These functions still require explicit iterator objects as their initial input, but the subsequent iteration does not expose an iterator object to the user.
511:
way of iterating through the elements of a collection without an explicit iterator. An iterator object may exist, but is not represented in the source code.
2059:) makes the iterator unusable. An attempt to get the next element throws the exception. An exception is also thrown if there are no more elements remaining (
3586:
are a fundamental part of the language, although usually users do not have to care about iterators. Their usage is hidden behind iteration APIs such as the
5414:
5334:
5235:
5196:
704:
iterator implementation is so tightly bound to the collection that it does preclude modification of the underlying collection without invalidating itself.
936:
method, to rewind the enumerator back to its initial position. The enumerator initially points to a special value before the first element, so a call to
3449:
exception will be raised when no more elements are left. The following example shows an equivalent iteration over a sequence using explicit iterators:
5781:
2218:
Java iterators and collections can be automatically converted into Scala iterators and collections, respectively, simply by adding the single line
241:. There are subtle differences and distinctions in the use of the terms "generator" and "iterator", which vary between authors and languages. In
1186:
the upper limit. The latter does not reference any element of the container at all but is a valid iterator value that can be compared against.
5481:
955:
property, to obtain the value of the element currently being pointed at;Container classes typically implement this interface. However, the
2478:. This is written in the new class-definition syntax introduced with MATLAB software version 7.6 (R2008a) and features a one-dimensional
2514:
5131:
Iterators were introduced as constructs to allow looping over abstract data structures without revealing their internal representation.
3441:
method internally, which returns the next element in the container. (The previous statement applies to Python 3.x. In Python 2.x, the
2486:(ADT) as the mechanism for storing a heterogeneous (in data type) set of elements. It provides the functionality for explicit forward
3841:
if no more values could be produced. The following example shows an equivalent iteration over a collection using explicit iterators:
246:
1904:
method advances the iterator and returns the value pointed to by the iterator. The first element is obtained upon the first call to
708:
the size of the tied collection, updating them all will drastically impair the complexity guarantee on the collection's operations.
1178:
does not point to any element in the range, but rather just beyond the end of the range. For traversal of an entire container, the
5451:
2105:
1883:
141:
1889:
3571:
3282:
1877:
5591:
5523:
5266:
2074:
5766:
669:
to access each element. Although indexing may be used with collections, the use of iterators may have advantages such as:
606:
or similar constructs may also make use of implicit iterators during the construction of the result list, as in Python:
5845:
5629:
5557:
2087:
1867:
729:
Iterators can be categorised according to their functionality. Here is a (non-exhaustive) list of iterator categories:
147:
An iterator is often implemented in terms of the structure underlying a collection implementation and is often tightly
89:
5840:
5047:
3429:
Iterators however can be used and defined explicitly. For any iterable sequence type or class, the built-in function
1444:
Simple traversal of a container object or a range of its elements (including modification of those elements unless a
108:
61:
2565:
2068:
1138:
and describes several categories of iterators differing in the repertoire of operations they allow. These include
5223:
Some authors use the term iterator, and others the term generator. Some make subtle distinctions between the two.
3286:
2082:
148:
134:
5252:
Freeman, Eric; Freeman, Elisabeth; Kathy, Sierra; Bert, Bates (2004). Hendrickson, Mike; Loukides, Mike (eds.).
2536:
interface. The two main interfaces for implementation in PHP scripts that enable objects to be iterated via the
68:
2548:. The latter does not require the implementing class to declare all required methods, instead it implements an
1165:
operators are used to reference the element to which the iterator points and pointer arithmetic operators like
960:
928:
method, which advances to the next element and indicates whether the end of the collection has been reached; a
699:
The ability of a collection to be modified while iterating through its elements has become necessary in modern
472:
46:
3207:// The \mysqli_result class that is returned by the method call implements the internal Traversable interface.
1460:
Implicit iteration is also partially supported by C++ through the use of standard function templates, such as
5214:. The University of Western Ontario, Department of Computer Science. Archived from the original on 2012-08-06
3266:
851:
500:
242:
5850:
2196:
225:
215:
2043:
can be called repeatedly, we use it to insert commas between the elements but not after the last element.
1441:
type, for which operations that would allow changing the values pointed to are intentionally not defined.
75:
3583:
1862:
877:
673:
Counting loops are not suitable to all data structures, in particular to data structures with no or slow
504:
488:
5825:
5645:
5393:
492:
162:
3331:
method of a dictionary can be iterated over where it yields corresponding key,value pairs as a tuple:
3269:
are a fundamental part of the language and in many cases go unseen as they are implicitly used in the
249:: a function that returns an iterator. An example of a Python generator returning an iterator for the
2342:
functions can be leveraged for performing custom or user defined operations over "native" arrays and
2056:
789:
484:
57:
42:
5211:
5171:
5687:
5056:
3555:
Any user-defined class can support standard iteration (either implicit or explicit) by defining an
1151:
803:
Different languages or libraries used with these languages define iterator types. Some of them are
5806:
3837:
method is supposed to produce and return the next value if possible, or return the sentinel value
2203:. However, because of the rich set of methods available in the Scala collections library, such as
1732:
976:
5796:
5686:
Internal refers to the fact that the interface cannot be implemented in PHP scripts, only in the
646:
35:
5156:
You can think of an iterator as pointing to an item that is part of a larger container of items.
4693:
trait and return an associated iterator type for their elements, enabling their use directly in
1893:
method. Iterators are created by the corresponding container class, typically by a method named
5309:
5116:
2475:
1135:
407:) that traverses a collection while applying a function to each element. For example, Python's
206:, however, only provides the traversal functionality and not the element access functionality.
5787:
1635:
1448:
is used) can be done using iterators alone. But container types may also provide methods like
400:
5821:
5811:
5429:
5349:
3060:
All methods of the example class are used during the execution of a complete foreach loop (
2561:
2215:
etc., it is often not necessary to deal with iterators directly when programming in Scala.
122:
5816:
5288:
5144:
8:
1474:
972:
932:
property, to obtain the value of the element currently being pointed at. and an optional
682:
665:
Instead of using an iterator, many languages allow the use of a subscript operator and a
404:
5771:
3433:
is used to create an iterator object. The iterator object can then be iterated with the
5455:
4536:
Rust makes use of external iterators throughout the standard library, including in its
3278:
2576:
2265:
supports both external and internal implicit iteration using either "native" arrays or
1462:
1154:
636:
603:
596:
508:
155:
130:
5777:
5087:
82:
5625:
5587:
5553:
5519:
5408:
5328:
5262:
5229:
5190:
3324:
1429:
container type allows traversal either using (raw) pointers to its elements (of type
5493:β’The iterator types iterator and const_iterator are of the forward iterator category
4612:
method, which returns an iterator that in turn yields the elements to the loop. The
3605:
The following example shows typical implicit iteration over a collection of values:
3327:) can also be directly iterated over, when the dictionary keys are returned; or the
5253:
3559:
method that returns an iterator object. The iterator object then needs to define a
2487:
2483:
1468:
678:
250:
174:
5791:
5065:
3990:
role. The DNA strand is split into a group of trinucleotides when iterated over:
963:
can operate on any object providing such a method, even if it does not implement
700:
5801:
5742:
5666:
2549:
913:
238:
5050: β Reusable design for writing code that provides a well-defined function
5834:
5371:
674:
480:
5394:"Types of iterator: Output vs. input vs. forward vs. random access iterator"
4616:
loop (or indeed, any method that consumes the iterator), proceeds until the
2571:
The simplest implementation is by wrapping an array, this can be useful for
1912:
test method is used. The following example shows a simple use of iterators:
1908:. To determine when all the elements in the container have been visited the
5700:
2564:
provides several classes to work with special iterators. PHP also supports
2526:
666:
642:
203:
199:
183:) and can change its internal state to provide access to the next element (
3669:
method can be invoked on the hash to iterate over the key and values; the
2047:
nonetheless performed, though the returned value is ignored in this case.
968:
144:
that provide items in different orders, such as forwards and backwards.
5721:
716:(globally more efficient) if the stability of the iterators is needed.
461:# Iterating over this iterator would result in 0, 1, 4, 9, 16, ..., 81.
229:
151:
to the collection to enable the operational semantics of the iterator.
5174:. CareerRide.COM. 2009-04-03. Archived from the original on 2012-09-19
4685:
Users can create custom iterators by creating a type implementing the
3661:
Raku hashes can also be directly iterated over; this yields key-value
2572:
623:
language has a few function templates for implicit iteration, such as
221:
1481:
When used they must be initialized with existing iterators, usually
24:
5122:. The University of Western Ontario, Department of Computer Science
5042:
5172:"Difference between an external iterator and an internal iterator"
5480:. Intel Threading Building Blocks for Open Source. Archived from
5430:"Introduction to SPL: Introduction to Standard PHP Library (SPL)"
3274:
2096:
1728:
956:
516:
1938:// Iterator<MyType> iter = list.iterator(); // in J2SE 5.0
220:
One way of implementing an iterator is via a restricted form of
4635:
All collections provided by the standard library implement the
3064:). The iterator's methods are executed in the following order:
2262:
3071:
ensures that the internal structure starts from the beginning.
1413:// Print value of each element 'x' of 'items'.
1368:// In C++11, the same can be done without using any iterators:
1278:// Append integer value '9' to vector 'items'.
1257:// Append integer value '2' to vector 'items'.
1236:// Append integer value '5' to vector 'items'.
1169:
are used to modify iterators in the traversal of a container.
3121:
The next example illustrates a PHP class that implements the
1131:
839:
746:
620:
514:
An implicit iterator is often manifest in language syntax as
476:
557:
In Ruby, iteration requires accessing an iterator property:
411:
function applies a caller-defined function to each element:
4544:
method of an iterator until it is consumed. The most basic
496:
179:
An iterator provides access to an element of a collection (
3252:// Act on the returned row, which is an associative array.
1871:
interface allows the iteration of container classes. Each
1546:// Function that will process each item of the collection.
1189:
The following example shows a typical use of an iterator.
916:(i.e. C#) are called "enumerators" and represented by the
619:
Sometimes the implicit hidden nature is only partial. The
5396:. stackoverflow. Archived from the original on 2012-08-08
3963:
is more complex and provides a series of methods such as
2522:
982:
The following shows a simple use of iterators in C# 2.0:
820:
654:
650:
523:
In Python, a collection object can be iterated directly:
5646:"java.util: Interface Iterator<E>: Method Summary"
5212:"A Technique for Generic Iteration and Its Optimization"
5117:"A Technique for Generic Iteration and Its Optimization"
3129:
class to act upon the data before it is returned to the
1362:// And print value of 'items' for current index.
16:
Object that enables processing collection items in order
5251:
5052:
Pages displaying short descriptions of redirect targets
3107:
advances to the next element in the internal structure.
5788:
A Technique for
Generic Iteration and Its Optimization
902:
133:
that progressively provides access to each item of a
5767:
Java's
Iterator, Iterable and ListIterator Explained
5061:
Pages displaying wikidata descriptions as a fallback
2466:
to each element of an array using built-in function
2187:
methods but has no methods to modify the container.
1761:// A for-each iteration loop with a lambda function.
1758:// Any standard container type of ItemType elements.
1516:// Any standard container type of ItemType elements.
202:
is sometimes also referred to as a loop iterator. A
140:
A collection may provide multiple iterators via its
49:. Unsourced material may be challenged and removed.
5166:
5164:
2518:UML class diagram of the Iterator interface in PHP
2099:) loop for iterating over collections and arrays.
943:Enumerators are typically obtained by calling the
5312:. BYTES. Archived from the original on 2012-08-09
4678:, etc.) as methods provided automatically by the
3982:class represents a DNA strand and implements the
5832:
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5147:. Cprogramming.com - Your resource for C and C++
4655:is automatically provided an implementation for
4520:Ruby can also iterate over fixed lists by using
3673:method to iterate over the hash's keys; and the
3062:foreach ($ iterator as $ key => $ current) {}
2117:loop, the preceding example can be rewritten as
695:problematic since the index numbers must change.
5247:
5245:
5161:
4400:, the following three examples are equivalent:
2369:% Perform a custom operation over each element
2175:Some containers also use the older (since 1.0)
1419:// Both of the for loops print "529".
5184:simultaneously on the existing or same object.
4701:type implements a custom, unbounded iterator:
4528:method or doing a for each on them, as above.
3959:to be implemented by the composing class. The
4624:value (iterations yielding elements return a
5622:"Effective Java: Programming Language Guide"
5242:
5110:
5108:
4689:trait. Custom collections can implement the
4643:method). Iterators themselves implement the
1134:language makes wide use of iterators in its
5509:
5507:
5505:
5503:
5501:
4651:method. Furthermore, any type implementing
3228:'SELECT `a`, `b`, `c` FROM `table`'
2462:that implicitly applies custom subfunction
5427:
5369:
5347:
3677:method to iterate over the hash's values.
2050:For collection types that support it, the
5478:"concurrent_unordered_set Template Class"
5105:
2326:traverses an array of integers using the
1110:: a method that is declared as returning
660:
154:An iterator is behaviorally similar to a
109:Learn how and when to remove this message
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5609:
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5605:
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5575:
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5498:
5391:
5307:
3919:# stop if we reached iteration's end
3125:interface, which could be wrapped in an
2408:% Echo resulting array to Command Window
5289:"Glossary β Python 3.8.4 documentation"
5142:
5115:Watt, Stephen M. (September 16, 2006).
5085:
5059: β concept in computer programming
3943:All iterable types in Raku compose the
471:Some object-oriented languages such as
5833:
5261:. Vol. 1. O'REILLY. p. 338.
4396:syntax for the basic iterating method
3955:is quite simple and only requires the
3563:method that returns the next element.
971:). Both interfaces were expanded into
641:Iterators are a useful abstraction of
373:# The generator constructs an iterator
5619:
5600:
5566:
5547:
5532:
5350:"C++ Iteratoren: Iterator-Kategorien"
2476:Design Pattern: Iterator (Behavioral)
1887:method, and may optionally support a
1182:method provides the lower limit, and
947:method of an object implementing the
5114:
4662:Iterators support various adapters (
3285:. All of Python's standard built-in
466:
390:
47:adding citations to reliable sources
18:
5449:
5088:"Understanding and Using Iterators"
4647:trait, which requires defining the
2085:5.0 release of Java introduced the
1338:// Iterate through 'items'.
13:
5624:(third ed.). Addison-Wesley.
5322:generation of more efficient code.
3133:loop. The usage together with the
2513:
2346:arrays respectively. For example,
903:In different programming languages
14:
5862:
5778:Understanding and Using Iterators
5760:
5581:
5048:Design pattern (computer science)
4548:loop for example iterates over a
4540:loop, which implicitly calls the
3902:# grab iteration's next value
2091:interface to support an enhanced
719:
5209:
5086:Gatcomb, Joshua (Jun 16, 2005).
3829:method is supposed to return an
2318:% Echo integer to Command Window
2201:scala.collection.TraversableOnce
2063:has previously returned false).
940:is required to begin iterating.
23:
5735:
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5693:
5680:
5659:
5638:
5470:
5443:
5421:
5385:
5363:
5068: β Software design pattern
4639:trait (meaning they define the
3567:
3323:Python dictionaries (a form of
1629:The same can be achieved using
1433:), or values of a special type
1107:
34:needs additional citations for
5341:
5301:
5281:
5203:
5136:
5079:
2556:) that returns an instance of
2274:-loop construct. For example,
1435:std::vector<T>::iterator
165:programming language in 1974.
1:
5352:(in German). cppreference.com
5308:Vecerina, Ivan (2006-02-01).
5072:
4599:// Prints the numbers 0 to 41
2357:% Define an array of integers
2279:% Define an array of integers
1624:// A for-each iteration loop.
724:
245:, a generator is an iterator
5548:Skeet, Jon (23 March 2019).
3097:returned value is stored in
3087:returned value is stored in
232:, a generator coroutine can
216:Generator (computer science)
209:
7:
5745:. The PHP Group. 2013-06-20
5701:"The Traversable interface"
5669:. The PHP Group. 2000-02-20
5036:
4524:s and either calling their
3880:# grab iterator for @values
2458:defines a primary function
10:
5867:
5802:Boost C++ Iterator Library
5255:Head First Design Patterns
3765:"$ key: $ value"
3183:'host.example.com'
634:
213:
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168:
5846:Object (computer science)
5514:Albahari, Joseph (2022).
5031:// Prints 1, 2, 5, and 13
4608:loop will call a value's
3570:implement this iteration
3445:method is equivalent.) A
3437:function, which uses the
3260:
2482:array realization of the
2303:% ... do something with n
2257:
1639:value as third iterator:
630:
5841:Iteration in programming
5688:C (programming language)
5057:Range (computer science)
4703:
4554:
4485:
4451:
4402:
4192:
4182:class composes both the
3992:
3843:
3799:"$ key => "
3679:
3607:
3451:
3379:
3333:
3291:
3147:
3117:and the loop is aborted.
3085:$ iterator->current()
2581:
2348:
2276:
2220:
2190:
2119:
1914:
1737:
1641:
1495:
1191:
984:
885:Recursive array iterator
798:
608:
559:
525:
413:
259:
5392:larsmans (2011-03-06).
4531:
4390:
3577:
3201:'database_name'
3069:$ iterator->rewind()
2484:List Abstract Data Type
2109:method that returns an
1856:
1148:random access iterators
1144:bidirectional iterators
907:
602:Languages that support
5620:Bloch, Joshua (2018).
4632:is the element type).
3111:$ iterator->valid()
3075:$ iterator->valid()
2519:
2509:
2435:% Simply multiply by 2
2075:java.util.ListIterator
1125:
777:Random access iterator
743:Bidirectional iterator
661:Contrast with indexing
161:Iterators date to the
5826:Reference description
5812:PHP: Object Iteration
5372:"Iterators: Concepts"
4659:that returns itself.
3598:, list indexing with
3283:generator expressions
3141:class implements the
3105:$ iterator->next()
2517:
2502:methods for use in a
2113:. Using the enhanced
1865:JDK 1.2 release, the
1636:std::ostream_iterator
1106:C# 2.0 also supports
635:Further information:
401:higher order function
228:. By contrast with a
3162:MYSQLI_REPORT_STRICT
3145:interface as well).
3095:$ iterator->key()
2562:Standard PHP Library
1427:std::vector<T>
123:computer programming
43:improve this article
5851:Abstract data types
5822:What are iterators?
5516:C# 10 in a Nutshell
5310:"index vs iterator"
4150:'GATTACATA'
4119:'GATTACATA'
4015:/^^ <>+ $ $ /
3951:role, or both. The
3279:list comprehensions
3156:MYSQLI_REPORT_ERROR
2692:'rewinding'
2490:traversal with the
2179:class. It provides
1062:// implicit version
987:// explicit version
649:languages, such as
604:list comprehensions
405:anonymous functions
257:statement follows:
5458:on 18 October 2018
4697:loops. Below, the
4604:Specifically, the
3195:'password'
3189:'username'
2587:Knowledge\Iterator
2577:information hiding
2520:
2066:Additionally, for
1868:java.util.Iterator
1861:Introduced in the
1155:pointer arithmetic
847:Directory iterator
637:Stream (computing)
597:anonymous function
491:(later versions),
483:(later versions),
479:(later versions),
5743:"PHP 5 ChangeLog"
5667:"PHP 4 ChangeLog"
5593:978-1-098-12195-2
5525:978-1-098-12195-2
5450:Collier, Andrew.
5268:978-0-596-00712-6
5210:Watt, Stephen M.
4620:method returns a
4364:"Hello"
3986:by composing the
3325:associative array
3234:MYSQLI_USE_RESULT
3135:MYSQLI_USE_RESULT
3010:'valid: '
2546:IteratorAggregate
2334:Furthermore, the
2249:to the file. The
2181:hasMoreElements()
1475:std::accumulate()
1140:forward iterators
1118:), but uses the "
912:Iterators in the
900:
899:
836:Constant iterator
796:
795:
467:Implicit iterator
397:internal iterator
391:Internal Iterator
251:Fibonacci numbers
185:element traversal
119:
118:
111:
93:
5858:
5754:
5753:
5751:
5750:
5739:
5733:
5732:
5730:
5729:
5718:
5712:
5711:
5709:
5708:
5697:
5691:
5684:
5678:
5677:
5675:
5674:
5663:
5657:
5656:
5654:
5653:
5642:
5636:
5635:
5617:
5598:
5597:
5579:
5564:
5563:
5545:
5530:
5529:
5511:
5496:
5495:
5490:
5489:
5474:
5468:
5467:
5465:
5463:
5454:. Archived from
5452:"Iterators in R"
5447:
5441:
5440:
5438:
5437:
5428:Kevin Waterson.
5425:
5419:
5418:
5412:
5404:
5402:
5401:
5389:
5383:
5382:
5380:
5379:
5370:Kevin Waterson.
5367:
5361:
5360:
5358:
5357:
5348:Kevin Waterson.
5345:
5339:
5338:
5332:
5324:
5318:
5317:
5305:
5299:
5298:
5296:
5295:
5285:
5279:
5278:
5276:
5275:
5260:
5249:
5240:
5239:
5233:
5225:
5220:
5219:
5207:
5201:
5200:
5194:
5186:
5180:
5179:
5168:
5159:
5158:
5153:
5152:
5140:
5134:
5133:
5128:
5127:
5121:
5112:
5103:
5102:
5096:
5095:
5083:
5062:
5053:
5032:
5029:
5026:
5023:
5020:
5017:
5014:
5011:
5008:
5005:
5002:
4999:
4996:
4993:
4990:
4987:
4984:
4981:
4978:
4975:
4972:
4969:
4966:
4963:
4960:
4957:
4953:
4950:
4947:
4944:
4941:
4938:
4935:
4932:
4929:
4926:
4923:
4920:
4917:
4914:
4911:
4908:
4905:
4902:
4899:
4896:
4893:
4890:
4887:
4884:
4881:
4878:
4875:
4872:
4869:
4866:
4863:
4860:
4857:
4854:
4851:
4848:
4845:
4842:
4838:
4835:
4832:
4828:
4825:
4822:
4819:
4816:
4813:
4810:
4807:
4804:
4801:
4798:
4795:
4792:
4789:
4786:
4783:
4780:
4777:
4774:
4771:
4768:
4765:
4762:
4759:
4756:
4753:
4750:
4746:
4743:
4740:
4737:
4734:
4731:
4728:
4725:
4722:
4719:
4716:
4713:
4710:
4707:
4700:
4696:
4692:
4688:
4681:
4677:
4673:
4669:
4665:
4658:
4654:
4650:
4646:
4642:
4638:
4631:
4627:
4623:
4619:
4615:
4611:
4607:
4600:
4597:
4594:
4591:
4588:
4585:
4582:
4579:
4576:
4573:
4570:
4567:
4564:
4561:
4558:
4551:
4547:
4543:
4539:
4527:
4523:
4516:
4513:
4510:
4507:
4504:
4501:
4498:
4495:
4492:
4489:
4483:or even shorter
4479:
4476:
4473:
4470:
4467:
4464:
4461:
4458:
4455:
4445:
4442:
4439:
4436:
4433:
4430:
4427:
4424:
4421:
4418:
4415:
4412:
4409:
4406:
4399:
4386:
4383:
4380:
4377:
4373:
4369:
4365:
4361:
4357:
4354:
4350:
4347:
4343:
4339:
4336:
4332:
4328:
4324:
4320:
4317:
4313:
4309:
4306:
4302:
4298:
4295:
4291:
4287:
4283:
4279:
4275:
4271:
4267:
4264:
4261:
4257:
4253:
4250:
4247:
4243:
4240:
4237:
4234:
4231:
4227:
4224:
4221:
4218:
4215:
4211:
4208:
4205:
4202:
4199:
4196:
4189:
4185:
4181:
4174:
4171:
4167:
4163:
4159:
4155:
4151:
4147:
4143:
4140:
4137:
4134:
4131:
4128:
4124:
4120:
4116:
4112:
4109:
4105:
4101:
4097:
4093:
4089:
4085:
4081:
4078:
4074:
4070:
4066:
4062:
4059:
4055:
4052:
4048:
4045:
4041:
4038:
4035:
4032:
4028:
4024:
4020:
4016:
4012:
4008:
4005:
4002:
3999:
3996:
3989:
3985:
3981:
3974:
3970:
3966:
3962:
3958:
3954:
3950:
3946:
3939:
3936:
3933:
3930:
3926:
3923:
3920:
3916:
3912:
3909:
3906:
3903:
3899:
3895:
3891:
3888:
3884:
3881:
3877:
3873:
3869:
3866:
3862:
3858:
3854:
3850:
3847:
3840:
3836:
3833:object, and the
3832:
3828:
3821:
3818:
3815:
3812:
3808:
3804:
3800:
3797:
3793:
3789:
3785:
3782:
3779:
3776:
3773:
3770:
3766:
3763:
3759:
3755:
3751:
3747:
3744:
3741:
3738:
3735:
3732:
3728:
3725:
3721:
3717:
3714:
3710:
3706:
3702:
3698:
3694:
3690:
3686:
3683:
3676:
3672:
3668:
3664:
3657:
3654:
3651:
3648:
3644:
3641:
3637:
3633:
3630:
3626:
3622:
3618:
3614:
3611:
3601:
3597:
3593:
3589:
3562:
3558:
3551:
3548:
3545:
3542:
3539:
3536:
3533:
3530:
3527:
3524:
3521:
3518:
3515:
3512:
3509:
3506:
3503:
3500:
3497:
3494:
3491:
3488:
3485:
3482:
3479:
3476:
3473:
3470:
3467:
3464:
3461:
3458:
3455:
3448:
3444:
3440:
3436:
3432:
3425:
3422:
3419:
3416:
3413:
3410:
3407:
3404:
3401:
3398:
3395:
3392:
3389:
3386:
3383:
3376:
3373:
3370:
3367:
3364:
3361:
3358:
3355:
3352:
3349:
3346:
3343:
3340:
3337:
3330:
3319:
3316:
3313:
3310:
3307:
3304:
3301:
3298:
3295:
3277:) statement, in
3272:
3256:
3253:
3250:
3247:
3244:
3241:
3238:
3235:
3232:
3229:
3226:
3223:
3220:
3217:
3214:
3211:
3208:
3205:
3202:
3199:
3196:
3193:
3190:
3187:
3184:
3181:
3178:
3175:
3172:
3169:
3166:
3163:
3160:
3157:
3154:
3151:
3144:
3140:
3136:
3132:
3128:
3127:IteratorIterator
3124:
3112:
3106:
3100:
3096:
3090:
3086:
3081:in this example.
3076:
3070:
3063:
3056:
3053:
3050:
3047:
3044:
3041:
3038:
3035:
3032:
3029:
3026:
3023:
3020:
3017:
3014:
3011:
3008:
3005:
3002:
2999:
2996:
2993:
2990:
2987:
2984:
2981:
2978:
2975:
2972:
2969:
2966:
2963:
2960:
2957:
2954:
2951:
2948:
2945:
2942:
2939:
2936:
2933:
2930:
2927:
2924:
2921:
2918:
2915:
2912:
2909:
2906:
2903:
2900:
2897:
2894:
2891:
2888:
2885:
2882:
2879:
2876:
2873:
2870:
2867:
2864:
2861:
2858:
2855:
2852:
2849:
2846:
2843:
2840:
2837:
2834:
2831:
2828:
2825:
2822:
2819:
2816:
2813:
2810:
2807:
2804:
2801:
2798:
2795:
2792:
2789:
2786:
2783:
2780:
2777:
2774:
2771:
2768:
2765:
2762:
2759:
2756:
2753:
2750:
2747:
2744:
2741:
2738:
2735:
2732:
2729:
2726:
2723:
2720:
2717:
2714:
2711:
2708:
2705:
2702:
2699:
2696:
2693:
2690:
2687:
2684:
2681:
2678:
2675:
2672:
2669:
2666:
2663:
2660:
2657:
2654:
2651:
2648:
2645:
2642:
2639:
2636:
2633:
2630:
2627:
2624:
2621:
2618:
2615:
2612:
2609:
2606:
2603:
2600:
2597:
2594:
2591:
2588:
2585:
2559:
2555:
2547:
2543:
2539:
2535:
2529:
2505:
2501:
2497:
2493:
2481:
2469:
2465:
2461:
2454:
2451:
2448:
2445:
2442:
2439:
2436:
2433:
2430:
2427:
2424:
2421:
2418:
2415:
2412:
2409:
2406:
2403:
2400:
2397:
2394:
2391:
2388:
2385:
2382:
2379:
2376:
2373:
2370:
2367:
2364:
2361:
2358:
2355:
2352:
2345:
2341:
2337:
2329:
2322:
2319:
2316:
2313:
2310:
2307:
2304:
2301:
2298:
2295:
2292:
2289:
2286:
2283:
2280:
2273:
2268:
2252:
2245:
2242:
2239:
2236:
2233:
2230:
2227:
2224:
2214:
2210:
2206:
2202:
2186:
2182:
2178:
2171:
2168:
2165:
2162:
2159:
2156:
2153:
2150:
2147:
2144:
2141:
2138:
2135:
2132:
2129:
2126:
2123:
2116:
2112:
2108:
2102:
2094:
2090:
2077:
2071:
2062:
2053:
2042:
2035:
2032:
2029:
2026:
2023:
2020:
2017:
2014:
2011:
2008:
2005:
2002:
1999:
1996:
1993:
1990:
1987:
1984:
1981:
1978:
1975:
1972:
1969:
1966:
1963:
1960:
1957:
1954:
1951:
1948:
1945:
1942:
1939:
1936:
1933:
1930:
1927:
1924:
1921:
1918:
1911:
1907:
1903:
1896:
1892:
1886:
1880:
1874:
1870:
1852:
1849:
1846:
1843:
1840:
1837:
1834:
1831:
1828:
1825:
1822:
1819:
1816:
1813:
1810:
1807:
1804:
1801:
1798:
1795:
1792:
1789:
1786:
1783:
1780:
1777:
1774:
1771:
1768:
1765:
1762:
1759:
1756:
1753:
1750:
1747:
1744:
1741:
1723:
1720:
1717:
1714:
1711:
1708:
1705:
1702:
1699:
1696:
1693:
1690:
1687:
1686:ostream_iterator
1684:
1681:
1678:
1675:
1672:
1669:
1666:
1663:
1660:
1657:
1654:
1651:
1648:
1645:
1638:
1632:
1625:
1622:
1619:
1616:
1613:
1610:
1607:
1604:
1601:
1598:
1595:
1592:
1589:
1586:
1583:
1580:
1577:
1574:
1571:
1568:
1565:
1562:
1559:
1556:
1553:
1550:
1547:
1544:
1541:
1538:
1535:
1532:
1529:
1526:
1523:
1520:
1517:
1514:
1511:
1508:
1505:
1502:
1499:
1492:
1488:
1484:
1477:
1471:
1465:
1455:
1451:
1447:
1440:
1436:
1432:
1428:
1420:
1417:
1414:
1411:
1408:
1405:
1402:
1399:
1396:
1393:
1390:
1387:
1384:
1381:
1378:
1375:
1372:
1369:
1366:
1363:
1360:
1357:
1354:
1351:
1348:
1345:
1342:
1339:
1336:
1333:
1330:
1327:
1324:
1321:
1318:
1315:
1312:
1309:
1306:
1303:
1300:
1297:
1294:
1291:
1288:
1285:
1282:
1279:
1276:
1273:
1270:
1267:
1264:
1261:
1258:
1255:
1252:
1249:
1246:
1243:
1240:
1237:
1234:
1231:
1228:
1225:
1222:
1219:
1216:
1213:
1210:
1207:
1204:
1201:
1198:
1195:
1185:
1181:
1176:
1168:
1164:
1160:
1136:Standard Library
1121:
1117:
1113:
1102:
1099:
1096:
1093:
1090:
1087:
1084:
1081:
1078:
1075:
1072:
1069:
1066:
1063:
1060:
1057:
1054:
1051:
1048:
1045:
1042:
1039:
1036:
1033:
1030:
1027:
1024:
1021:
1018:
1015:
1012:
1009:
1006:
1003:
1000:
997:
994:
991:
988:
966:
954:
950:
946:
939:
935:
931:
927:
923:
919:
828:Caching iterator
806:
805:
785:Trivial iterator
753:Forward iterator
732:
731:
626:
615:
612:
590:
587:
584:
581:
578:
575:
572:
569:
566:
563:
553:
550:
547:
544:
541:
538:
535:
532:
529:
519:
462:
459:
456:
453:
450:
447:
444:
441:
438:
435:
432:
429:
426:
423:
420:
417:
410:
386:
383:
380:
377:
374:
371:
368:
365:
362:
359:
356:
353:
350:
347:
344:
341:
338:
335:
332:
329:
326:
323:
320:
317:
314:
311:
308:
305:
302:
299:
296:
293:
290:
287:
284:
281:
278:
275:
272:
269:
266:
263:
256:
175:Iterator pattern
114:
107:
103:
100:
94:
92:
51:
27:
19:
5866:
5865:
5861:
5860:
5859:
5857:
5856:
5855:
5831:
5830:
5792:Stephen M. Watt
5763:
5758:
5757:
5748:
5746:
5741:
5740:
5736:
5727:
5725:
5724:. The PHP Group
5720:
5719:
5715:
5706:
5704:
5703:. The PHP Group
5699:
5698:
5694:
5685:
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5618:
5601:
5594:
5582:Price, Mark J.
5580:
5567:
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5150:
5148:
5145:"STL Iterators"
5141:
5137:
5125:
5123:
5119:
5113:
5106:
5093:
5091:
5084:
5080:
5075:
5066:Visitor pattern
5060:
5051:
5039:
5034:
5033:
5030:
5027:
5024:
5022:"{n}"
5021:
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3823:
3822:
3819:
3816:
3814:# three => 3
3813:
3810:
3806:
3803:%word-to-number
3802:
3798:
3795:
3791:
3787:
3784:%word-to-number
3783:
3780:
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3774:
3771:
3768:
3764:
3761:
3757:
3753:
3749:
3746:%word-to-number
3745:
3742:
3739:
3736:
3734:# three => 3
3733:
3730:
3726:
3723:
3719:
3716:%word-to-number
3715:
3712:
3708:
3705:'three'
3704:
3700:
3696:
3692:
3688:
3685:%word-to-number
3684:
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3534:
3531:
3528:
3526:# in Python 3.x
3525:
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3510:
3507:
3505:# in Python 2.x
3504:
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3068:
3061:
3058:
3057:
3054:
3051:
3048:
3045:
3042:
3039:
3036:
3033:
3031:'false'
3030:
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2767:"current:
2766:
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2281:
2278:
2271:
2266:
2260:
2251:JavaConversions
2250:
2247:
2246:
2243:
2240:
2238:JavaConversions
2237:
2234:
2231:
2228:
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2222:
2212:
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2200:
2193:
2184:
2180:
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2110:
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2100:
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2073:
2067:
2060:
2051:
2040:
2037:
2036:
2033:
2030:
2027:
2024:
2021:
2018:
2015:
2012:
2009:
2006:
2003:
2000:
1997:
1994:
1991:
1988:
1985:
1982:
1979:
1976:
1973:
1970:
1967:
1964:
1961:
1958:
1955:
1952:
1949:
1946:
1943:
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1934:
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1772:
1769:
1766:
1763:
1760:
1757:
1754:
1751:
1748:
1745:
1742:
1739:
1733:lambda function
1725:
1724:
1721:
1718:
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1700:
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1503:
1500:
1497:
1490:
1486:
1482:
1473:
1467:
1463:std::for_each()
1461:
1453:
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1434:
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1199:
1196:
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1183:
1179:
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1128:
1119:
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1100:
1097:
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1022:
1019:
1016:
1013:
1010:
1007:
1004:
1001:
998:
995:
992:
989:
986:
964:
952:
948:
945:GetEnumerator()
944:
937:
933:
929:
925:
921:
917:
910:
905:
858:Filter iterator
801:
769:Output iterator
727:
722:
701:object-oriented
663:
639:
633:
624:
617:
616:
613:
610:
592:
591:
588:
585:
582:
579:
576:
573:
570:
567:
564:
561:
555:
554:
551:
548:
545:
542:
539:
536:
533:
530:
527:
515:
469:
464:
463:
460:
457:
454:
451:
448:
445:
442:
439:
436:
433:
430:
427:
424:
421:
418:
415:
408:
393:
388:
387:
384:
381:
378:
375:
372:
369:
366:
363:
360:
357:
354:
351:
348:
345:
342:
339:
336:
333:
330:
327:
324:
321:
318:
315:
312:
309:
306:
303:
300:
297:
294:
291:
288:
285:
282:
279:
276:
273:
270:
267:
264:
261:
254:
253:using Python's
239:tree traversers
218:
212:
177:
171:
156:database cursor
115:
104:
98:
95:
52:
50:
40:
28:
17:
12:
11:
5:
5864:
5854:
5853:
5848:
5843:
5829:
5828:
5819:
5814:
5809:
5807:Java interface
5804:
5799:
5794:
5790:" (217 KB) by
5784:
5782:Joshua Gatcomb
5774:
5772:.NET interface
5769:
5762:
5761:External links
5759:
5756:
5755:
5734:
5713:
5692:
5679:
5658:
5637:
5631:978-0134685991
5630:
5599:
5592:
5565:
5559:978-1617294532
5558:
5531:
5524:
5497:
5469:
5442:
5420:
5384:
5362:
5340:
5300:
5280:
5267:
5241:
5202:
5160:
5135:
5104:
5077:
5076:
5074:
5071:
5070:
5069:
5063:
5054:
5045:
5038:
5035:
4704:
4584:"{}"
4555:
4533:
4530:
4486:
4452:
4403:
4392:
4389:
4344:{
4333:;
4325:{
4193:
3993:
3844:
3680:
3608:
3579:
3576:
3452:
3380:
3334:
3292:
3262:
3259:
3148:
3119:
3118:
3108:
3102:
3092:
3082:
3072:
3025:'true'
2582:
2511:
2508:
2349:
2277:
2259:
2256:
2221:
2192:
2189:
2120:
2069:java.util.List
2028:", "
1915:
1858:
1855:
1738:
1642:
1496:
1446:const_iterator
1439:const_iterator
1192:
1127:
1124:
985:
914:.NET Framework
909:
906:
904:
901:
898:
897:
894:
890:
889:
886:
882:
881:
875:
871:
870:
867:
866:Limit iterator
863:
862:
859:
855:
854:
848:
844:
843:
837:
833:
832:
829:
825:
824:
818:
817:Array iterator
814:
813:
810:
800:
797:
794:
793:
786:
782:
781:
778:
774:
773:
770:
766:
765:
762:
761:Input iterator
758:
757:
754:
750:
749:
744:
740:
739:
736:
726:
723:
721:
720:Classification
718:
697:
696:
692:
689:
686:
662:
659:
632:
629:
609:
560:
526:
468:
465:
422:squared_digits
414:
403:(often taking
392:
389:
260:
214:Main article:
211:
208:
181:element access
173:Main article:
170:
167:
117:
116:
31:
29:
22:
15:
9:
6:
4:
3:
2:
5863:
5852:
5849:
5847:
5844:
5842:
5839:
5838:
5836:
5827:
5823:
5820:
5818:
5817:STL Iterators
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5484:on 2015-05-01
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5143:Alex Allain.
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4173:# GAT-TAC-ATA
3991:
3976:
3842:
3820:# two => 2
3817:# one => 1
3740:# two => 2
3737:# one => 1
3697:'two'
3689:'one'
3678:
3665:objects. The
3606:
3603:
3585:
3582:Iterators in
3575:
3573:
3569:
3564:
3532:StopIteration
3450:
3447:StopIteration
3332:
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3265:Iterators in
3150:mysqli_report
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60: β
59:
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54:Find sources:
48:
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32:This article
30:
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5747:. Retrieved
5737:
5726:. Retrieved
5716:
5705:. Retrieved
5695:
5682:
5671:. Retrieved
5661:
5650:. Retrieved
5640:
5621:
5583:
5549:
5518:. O'Reilly.
5515:
5492:
5486:. Retrieved
5482:the original
5472:
5460:. Retrieved
5456:the original
5445:
5434:. Retrieved
5423:
5398:. Retrieved
5387:
5376:. Retrieved
5365:
5354:. Retrieved
5343:
5320:
5314:. Retrieved
5303:
5292:. Retrieved
5283:
5272:. Retrieved
5254:
5222:
5216:. Retrieved
5205:
5182:
5176:. Retrieved
5155:
5149:. Retrieved
5138:
5130:
5124:. Retrieved
5098:
5092:. Retrieved
5081:
4691:IntoIterator
4684:
4661:
4657:IntoIterator
4637:IntoIterator
4634:
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4349:IterationEnd
4314:){
4292:; }
4276:) {
4177:
4063:) {
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3839:IterationEnd
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3139:PDOStatement
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2573:type hinting
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1157:, where the
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1120:yield return
1105:
981:
975:versions in
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893:XML iterator
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667:loop counter
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41:Please help
36:verification
33:
5722:"Iterators"
5552:. Manning.
5550:C# in Depth
5462:16 November
5432:. PHPRO.ORG
5259:(paperback)
4641:into_iter()
4610:into_iter()
4166:'-'
3878:;
3590:statement,
3143:Traversable
3123:Traversable
2845:"key:
2629:__construct
2568:since 5.5.
2558:Traversable
2554:getIterator
2534:Traversable
2464:myCustomFun
2423:myCustomFun
2390:myCustomFun
2177:Enumeration
2072:there is a
1875:provides a
1618:ProcessItem
1522:ProcessItem
1469:std::copy()
1116:IEnumerable
1112:IEnumerator
990:IEnumerator
969:duck typing
965:IEnumerable
949:IEnumerable
924:provides a
922:IEnumerator
918:IEnumerator
647:data-driven
507:provide an
247:constructor
5835:Categories
5749:2015-10-13
5728:2015-10-13
5707:2015-10-13
5673:2015-10-13
5652:2012-08-08
5488:2012-08-09
5436:2012-08-09
5400:2012-08-09
5378:2012-08-09
5356:2012-08-09
5316:2012-08-08
5294:2020-07-15
5274:2012-08-09
5218:2012-08-08
5178:2012-08-08
5151:2012-08-08
5126:2012-08-08
5094:2012-08-08
5090:. Perl.com
5073:References
4522:Enumerator
4449:...and...
4351:} } }
4340:}
3772:# three: 3
3568:generators
3561:__next__()
3557:__iter__()
3439:__next__()
3397:dictionary
3357:dictionary
3345:dictionary
3287:collection
2566:Generators
2411:myNewArray
2372:myNewArray
2232:collection
2106:iterator()
1895:iterator()
1431:*<T>
1108:generators
938:MoveNext()
926:MoveNext()
920:interface.
812:Languages
738:Languages
725:Categories
625:for_each()
230:subroutine
135:collection
69:newspapers
58:"Iterator"
5797:Iterators
5786:Article "
5776:Article "
5586:. Packt.
4952:Fibonacci
4788:Fibonacci
4730:Fibonacci
4709:Fibonacci
4699:Fibonacci
4376:# OUTPUT:
4370:) { .
4170:# OUTPUT:
4136:# (A T A)
4133:# (T A C)
4130:# (G A T)
4127:# OUTPUT:
4121:) { .
4025: %%
3975:methods.
3929:# OUTPUT:
3892: :=
3870: :=
3811:# OUTPUT:
3769:# OUTPUT:
3731:# OUTPUT:
3647:# OUTPUT:
3566:Python's
3281:, and in
2605:\Iterator
2584:namespace
2540:loop are
2492:hasNext()
2460:simpleFun
2438:outScalar
2417:outScalar
2354:simpleFun
2330:keyword.
2061:hasNext()
2041:hasNext()
1910:hasNext()
1884:hasNext()
1631:std::copy
1266:push_back
1245:push_back
1224:push_back
1092:WriteLine
1044:WriteLine
788:C++ (old
509:intrinsic
361:fibonacci
265:fibonacci
226:generator
222:coroutine
210:Generator
142:interface
99:June 2010
5648:. Oracle
5409:cite web
5329:cite web
5230:cite web
5191:cite web
5043:Iteratee
5037:See also
5016:println!
4782:Iterator
4687:Iterator
4680:Iterator
4668:filter()
4653:Iterator
4645:Iterator
4578:println!
4356:Repeater
4327:$ !count
4323:$ !times
4319:$ !count
4310:(-->
4308:pull-one
4297:iterator
4288:, :
4252:$ !count
4242:required
4236:$ .times
4226:required
4210:Iterator
4204:Iterable
4198:Repeater
4188:Iterator
4184:Iterable
4180:Repeater
4104:iterator
4088:$ .chain
4080:iterator
4058:Strand:D
4047:$ .chain
4040:Iterable
3988:Iterable
3984:iterator
3973:pull-one
3969:iterator
3965:pull-one
3961:Iterator
3957:iterator
3953:Iterable
3949:Iterator
3945:Iterable
3900:;
3898:pull-one
3876:iterator
3835:pull-one
3831:Iterator
3827:iterator
3778:# two: 2
3775:# one: 1
3572:protocol
3466:sequence
3303:sequence
3216:$ mysqli
3168:$ mysqli
3113:returns
3077:returns
2962:function
2884:function
2806:function
2728:function
2671:function
2626:function
2552:method (
2550:accessor
2542:Iterator
2468:arrayfun
2450:inScalar
2429:inScalar
2414:function
2378:arrayfun
2351:function
2336:arrayfun
2111:Iterator
2101:Iterable
2088:Iterable
2052:remove()
1932:iterator
1917:Iterator
1890:remove()
1873:Iterator
1836:<<
1830:<<
1806:ItemType
1770:for_each
1746:ItemType
1692:ItemType
1588:for_each
1564:<<
1558:<<
1531:ItemType
1504:ItemType
1491:for_each
1404:<<
1350:<<
1032:MoveNext
977:.NET 2.0
735:Category
562:iterable
537:iterable
127:iterator
5690:source.
4989:step_by
4682:trait.
4626:Some(T)
4385:# Hello
4382:# Hello
4379:# Hello
4338:$ !item
4290:$ times
4284: :
4274:$ times
4220:$ .item
4190:roles:
4073:$ chain
4071: :
4061:$ chain
3971:and/or
3925:$ value
3911:$ value
3890:$ value
3872:@values
3849:@values
3758:$ value
3643:$ value
3636:$ value
3632:@values
3613:@values
3602:, etc.
3329:items()
3275:foreach
3210:foreach
3177:\mysqli
3131:foreach
3089:$ value
3046:$ valid
3037:PHP_EOL
3019:$ valid
2992:current
2980:$ valid
2950:$ value
2941:PHP_EOL
2929:$ value
2896:$ value
2863:PHP_EOL
2794:$ value
2785:PHP_EOL
2773:$ value
2746:current
2740:$ value
2731:current
2698:PHP_EOL
2659:$ array
2638:$ array
2617:$ array
2611:private
2602:extends
2538:foreach
2528:foreach
2506:-loop.
2500:reset()
2402:myArray
2360:myArray
2340:cellfun
2300:myArray
2282:myArray
2209:collect
2097:foreach
2004:hasNext
1953:hasNext
1180:begin()
1086:Console
1065:foreach
1056:Current
1038:Console
973:generic
957:foreach
953:Current
934:Reset()
930:Current
861:PHP, R
677:, like
517:foreach
169:Pattern
149:coupled
83:scholar
5628:
5590:
5556:
5522:
5265:
5100:value.
4831:Option
4829:->
4747:->
4706:struct
4676:take()
4672:skip()
4649:next()
4618:next()
4552:type:
4542:next()
4346:return
4335:return
4321:<=
4305:method
4303:}
4294:method
4286:$ item
4282:bless:
4270:$ item
4263:method
4258:;
4244:;
4228:;
4212:{
4084:DNA:D:
4077:method
4075:}
4069:bless:
4051:method
4049:;
4042:{
3998:Strand
3995:subset
3947:role,
3885:{
3794:{
3790:->
3760:{
3752:->
3727:$ pair
3722:{
3720:$ pair
3718:->
3707:=>
3699:=>
3691:=>
3675:values
3638:{
3634:->
3529:except
3443:next()
3435:next()
3431:iter()
3267:Python
3261:Python
3043:return
2986:$ this
2959:public
2947:return
2935:"
2908:$ this
2881:public
2869:return
2857:"
2830:$ this
2803:public
2791:return
2779:"
2752:$ this
2725:public
2710:$ this
2674:rewind
2668:public
2647:$ this
2623:public
2560:. The
2496:next()
2263:MATLAB
2258:MATLAB
2223:import
2213:filter
2146:System
2128:MyType
2057:thread
2010:System
1962:System
1906:next()
1902:next()
1878:next()
1727:Since
1719:"
1713:"
1450:insert
1200:vector
1146:, and
1071:MyType
996:MyType
852:Python
842:, PHP
631:Stream
501:Python
481:Delphi
455:digits
434:lambda
416:digits
382:number
355:number
243:Python
131:object
129:is an
85:
78:
71:
64:
56:
5780:" by
5374:. sgi
5120:(PDF)
4818:&
4664:map()
4550:Range
4526:#next
4494:times
4260:multi
4195:class
4106:} };
4096:rotor
4031:class
4023:chars
4011:match
4007:where
3809:}; }
3807:$ key
3792:$ key
3754:$ key
3547:value
3541:print
3538:break
3508:value
3487:value
3472:while
3421:value
3409:print
3403:items
3391:value
3372:value
3360:print
3351:value
3315:value
3309:print
3297:value
3243:$ row
3222:query
3219:->
3115:false
3099:$ key
3001:false
2989:->
2965:valid
2914:array
2911:->
2872:$ key
2851:$ key
2836:array
2833:->
2818:$ key
2758:array
2755:->
2716:array
2713:->
2704:reset
2653:array
2650:->
2635:array
2614:array
2596:class
2593:final
2504:while
2226:scala
2197:Scala
2191:Scala
2158:print
2022:print
1974:print
1941:while
1809:&
1803:const
1782:begin
1729:C++11
1662:begin
1600:begin
1534:&
1528:const
1483:begin
1454:erase
1386:items
1314:items
1302:begin
1296:items
1260:items
1239:items
1218:items
1212:items
1184:end()
1163:->
1098:value
1074:value
1020:while
850:PHP,
799:Types
683:trees
679:lists
611:names
586:value
577:value
549:value
543:print
531:value
399:is a
376:print
319:yield
313:limit
307:range
271:limit
255:yield
234:yield
125:, an
90:JSTOR
76:books
5626:ISBN
5588:ISBN
5554:ISBN
5520:ISBN
5464:2013
5415:link
5335:link
5263:ISBN
5236:link
5197:link
5001:take
4977:skip
4931:next
4925:Some
4919:next
4907:self
4895:self
4883:self
4871:self
4859:self
4853:next
4844:>
4841:Item
4837:Self
4834:<
4824:self
4812:next
4797:Item
4794:type
4779:impl
4755:Self
4749:Self
4727:impl
4622:None
4532:Rust
4509:puts
4472:puts
4438:puts
4423:each
4398:each
4391:Ruby
4342:else
4301:self
4278:self
4207:does
4201:does
4186:and
4178:The
4162:join
4158:join
4092:comb
4065:self
4037:does
3978:The
3927:; }
3913:=:=
3905:last
3894:$ it
3883:loop
3868:$ it
3788:keys
3729:; }
3671:keys
3663:Pair
3596:grep
3584:Raku
3578:Raku
3514:next
3499:next
3475:True
3460:iter
3079:true
3007:echo
2974:bool
2920:echo
2902:next
2887:next
2842:echo
2764:echo
2689:echo
2683:void
2575:and
2544:and
2530:loop
2498:and
2488:List
2480:cell
2344:cell
2338:and
2306:disp
2267:cell
2183:and
2137:list
2083:J2SE
2081:The
1998:iter
1989:());
1986:next
1980:iter
1947:iter
1926:list
1920:iter
1900:The
1881:and
1863:Java
1857:Java
1845:endl
1827:cout
1749:>
1743:<
1707:cout
1695:>
1689:<
1650:copy
1573:endl
1555:cout
1519:void
1507:>
1501:<
1485:and
1472:and
1401:cout
1377:auto
1347:cout
1287:auto
1209:>
1203:<
1161:and
1130:The
1114:(or
1080:list
1050:iter
1026:iter
1008:list
1002:iter
999:>
993:<
908:.NET
896:PHP
888:PHP
880:, R
878:Java
869:PHP
831:PHP
823:, R
809:Type
780:C++
772:C++
764:C++
756:C++
653:and
583:puts
568:each
505:Ruby
497:Perl
489:Java
62:news
4971:fib
4962:for
4959:();
4956:new
4946:fib
4943:let
4850:let
4821:mut
4803:u64
4785:for
4742:new
4736:pub
4721:u64
4715:u64
4695:for
4614:for
4606:for
4557:for
4546:for
4538:for
4515:end
4478:end
4466:...
4454:for
4444:end
4411:...
4372:say
4360:new
4353:for
4329:+=
4266:new
4249:Int
4246:has
4233:Int
4230:has
4217:Any
4214:has
4168:);
4156:(*.
4154:map
4146:new
4142:DNA
4139:say
4123:say
4115:new
4111:DNA
4108:for
4086:){
4054:new
4044:has
4034:DNA
4029:};
4019:and
4009:{ .
4004:Str
3980:DNA
3938:# 3
3935:# 2
3932:# 1
3922:say
3796:say
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