88 lines
2.8 KiB
Factor
88 lines
2.8 KiB
Factor
! Copyright (C) 2008 Doug Coleman.
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! See http://factorcode.org/license.txt for BSD license.
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USING: help.markup help.syntax io.streams.string sequences
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math kernel quotations ;
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IN: circular
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HELP: <circular-string>
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{ $values
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{ "n" integer }
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{ "circular" circular } }
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{ $description "Creates a new circular string object. A circular string is a string object that can be accessed out of bounds and the index will wrap around to the start of the string." } ;
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HELP: <circular>
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{ $values
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{ "seq" sequence }
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{ "circular" circular } }
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{ $description "Creates a new " { $link circular } " object that wraps an existing sequence. By default, the index is set to zero." } ;
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HELP: <growing-circular>
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{ $values
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{ "capacity" integer }
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{ "growing-circular" growing-circular } }
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{ $description "Creates a new growing-circular object." } ;
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HELP: change-circular-start
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{ $values
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{ "n" integer } { "circular" circular } }
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{ $description "Changes the start index of a circular object." } ;
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HELP: circular
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{ $description "A tuple class that stores a sequence and its start index." } ;
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HELP: growing-circular
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{ $description "A circular sequence that is growable." } ;
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HELP: circular-push
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{ $values
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{ "elt" object } { "circular" circular } }
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{ $description "Pushes an element to a " { $link circular } " object." } ;
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HELP: growing-circular-push
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{ $values
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{ "elt" object } { "circular" circular } }
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{ $description "Pushes an element onto a " { $link growing-circular } " object." } ;
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HELP: rotate-circular
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{ $values
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{ "circular" circular } }
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{ $description "Advances the start index of a circular object by one." } ;
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HELP: circular-while
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{ $values
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{ "circular" circular }
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{ "quot" quotation }
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}
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{ $description "Calls " { $snippet "quot" } " on each element of the sequence until each call yields " { $link f } " in succession." } ;
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HELP: circular-loop
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{ $values
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{ "circular" circular }
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{ "quot" quotation }
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}
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{ $description "Calls " { $snippet "quot" } " on each element of the sequence until one call yields " { $link f } "." }
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{ $notes "This rotates the " { $link circular } " object after each call, so the next element to be applied will always be the first element." } ;
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ARTICLE: "circular" "Circular sequences"
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"The " { $vocab-link "circular" } " vocabulary implements the " { $link "sequence-protocol" } " to allow an arbitrary start index and wrap-around indexing." $nl
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"Creating a new circular object:"
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{ $subsections
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<circular>
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<circular-string>
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<growing-circular>
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}
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"Changing the start index:"
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{ $subsections
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change-circular-start
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rotate-circular
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}
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"Pushing new elements:"
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{ $subsections
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circular-push
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growing-circular-push
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}
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"Iterating over a circular until a stop condition:"
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{ $subsections circular-while circular-loop } ;
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ABOUT: "circular"
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