26 lines
821 B
Plaintext
26 lines
821 B
Plaintext
IN: queues
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USING: help ;
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ARTICLE: "queues" "Queues"
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"Last-in-first-out queues can be found in the " { $snippet "queues" } " vocabulary."
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{ $subsection <queue> }
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{ $subsection queue-empty? }
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{ $subsection deque }
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{ $subsection enque } ;
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HELP: <queue> "( -- queue )"
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{ $values { "queue" "a new queue" } }
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{ $description "Makes a new queue with no elements." } ;
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HELP: queue-empty? "( queue -- ? )"
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{ $values { "queue" "a queue" } { "?" "a boolean" } }
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{ $description "Tests if a queue contains no elements." } ;
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HELP: deque "( queue -- elt )"
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{ $values { "queue" "a queue" } { "elt" "an object" } }
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{ $description "Removes an element from the front of the queue." } ;
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HELP: enque "( elt queue -- )"
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{ $values { "elt" "an object" } { "queue" "a queue" } }
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{ $description "Adds an element to the back of the queue." } ;
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