Examples of using An iterator in English and their translations into Serbian
{-}
-
Colloquial
-
Ecclesiastic
-
Computer
-
Latin
-
Cyrillic
It looks like a function but acts like an iterator.
An iterator is behaviorally similar to a database cursor.
The following example shows a typical use of an iterator.
By using an iterator one is isolated from these sorts of consequences.
In short, a generator looks like a function but behaves like an iterator.
An iterator may allow the container object to be modified without invalidating the iterator. .
In short, a generator appears to be a function but it behaves like an iterator.”.
In Python, a generator is an iterator constructor:a function that returns an iterator.
For any iterable sequence type or class, the built-in function iter()is used to create an iterator object.
In object-oriented languages an iterator, even if implicit, is often used as the means of traversal.
Any user-defined class can support standard iteration(either implicit or explicit) by defining an__iter__()method that returns an iterator object.
Instead of the Java“foreach” loops for looping through an iterator, Scala has a much more powerful concept of for-expressions.
When an iterator is advanced beyond the last element it is by definition equal to the special end iterator value.
In Python, an iterable is an object which can be converted to an iterator, which is then iterated through during the for loop;
For instance, once an iterator has advanced beyond the first element it may be possible to insert additional elements into the beginning of the container with predictable results.
In more complicated situations,a generator may be used manually outside of a loop to create an iterator, which can then be used in various ways.
In computer programming, an iterator is an object that enables a programmer to traverse a container, particularly lists.
In addition, associative arrays may also include other operations such as determining the number of bindings or constructing an iterator to loop over all the bindings.
The primary purpose of an iterator is to allow a user to process every element of a container while isolating the user from the internal structure of the container.
Iterating over a container is done using this form of loop: for e in c while w do loop body od; The in c clause specifies the container, which may be a list, set, sum, product, unevaluated function, array, oran object implementing an iterator.
An iterator is an object that provides iteration as a generic service, allowing iteration to be done in the same way for a range of different data structures.
The syntax of a for-loop is based on the heritage of the language and the prior programming languages it borrowed from, so programming languages thatare descendants of or offshoots of a language that originally provided an iterator will often use the same keyword to name an iterator, e.g.
There must also be a way to create an iterator so it points to some first element as well as some way to determine when the iterator has exhausted all of the elements in the container.
Implicit iterators are often manifested by a"foreach" statement(or equivalent), such as in the following Python example: for value in iterable: print value In Python,an iterable is an object which can be converted to an iterator, which is then iterated through during the for loop; this is done implicitly.
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.
The following example shows an equivalent iteration over a sequence using explicit iterators: it= iter(sequence) while True: try: value= it. next() in Python 2.x value= next(it) in Python 3.x except StopIteration: break print(value) Any user-defined class can support standard iteration(either implicit or explicit) by defining an__iter__()method that returns an iterator object.
The first time that a generator invocation is reached in a loop, an iterator object is created that encapsulates the state of the generator routine at its beginning, with arguments bound to the corresponding parameters.
An iterator performs traversal and also gives access to data elements in a container, but does not itself perform iteration(i.e., not without some significant liberty taken with that concept or with trivial use of the terminology).
User-created containers only have to provide an iterator that implements one of the five standard iterator interfaces, and all the algorithms provided in the STL can be used on the container.
