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In Perl, foreach (which is equivalent to the shorter for) can be used to traverse elements of a list. The expression which denotes the collection to loop over is evaluated in list-context and each item of the resulting list is, in turn, aliased to the loop variable. List literal example:
On the other hand, since simple linked lists by themselves do not allow random access to the data or any form of efficient indexing, many basic operations—such as obtaining the last node of the list, finding a node that contains a given datum, or locating the place where a new node should be inserted—may require iterating through most or ...
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, or object implementing an iterator. A for-loop may be terminated by od, end, or end do.
In computer programming, an iterator is an object that progressively provides access to each item of a collection, in order. [1] [2] [3]A collection may provide multiple iterators via its interface that provide items in different orders, such as forwards and backwards.
This list of lists of lists is a list of articles that are lists of other list articles. Each of the pages linked here is an index to multiple lists on a topic.
List of tallest buildings in Massachusetts; List of U.S. communities with African American majority populations; List of wars involving India (disambiguation) Listed buildings in Halton, Cheshire; Lists of armies; Lists of Billboard 200 number-one albums; Lists of Carnegie libraries; Lists of conferences; Lists of fantasy novels
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A useful list-of-lists article will normally present the lists in a more structured form than is possible with a category and/or provide more information than just the names of the lists." In reality, a lot of the list-of-lists articles just repeat the matching category, or (worse) a subset of the category.