Queue/Usage: Difference between revisions
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→{{header|EasyLang}}
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E also has queues in the standard library such as <code><import:org.erights.e.examples.concurrency.makeQueue></code>, but they are designed for concurrency purposes and do not report emptiness but rather return a promise for the next element.
=={{header|EasyLang}}==
Uses the queue-definition given at [[Queue/Definition#EasyLang]]
<syntaxhighlight>
#
# queue definition
#
##
qu_enq 2
qu_enq 5
qu_enq 7
while qu_empty = 0
print qu_deq
.
</syntaxhighlight>
=={{header|Elena}}==
ELENA
<syntaxhighlight lang="elena">import system'collections;
import extensions;
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var queue := new Queue();
queue.push
queue.push
queue.push
// "Pop" items from the queue in FIFO order
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// If we try to pop from an empty queue, an exception
// is thrown.
queue.pop()
}</syntaxhighlight>
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=={{header|Wren}}==
{{libheader|Wren-queue}}
<syntaxhighlight lang="
var q = Queue.new()
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