Bug #6985 ยป 0001-Documentation-Examples-for-Abbrev.patch
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# "rule" => "rules",
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# "rules" => "rules" }
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#
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# It also adds an +abbrev+ method to class Array.
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# It also provides an array core extension, Array#abbrev.
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#
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# pp %w{april may}.abbrev
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# #=> {"summe"=>"summer",
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# "summ"=>"summer",
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# "sum"=>"summer",
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# "su"=>"summer",
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# "s"=>"summer",
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# "winte"=>"winter",
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# "wint"=>"winter",
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# "win"=>"winter",
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# "wi"=>"winter",
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# "w"=>"winter",
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# "summer"=>"summer",
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# "winter"=>"winter"}
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module Abbrev
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# Given a set of strings, calculate the set of unambiguous
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# abbreviations for those strings, and return a hash where the keys
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# are all the possible abbreviations and the values are the full
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# strings. Thus, given input of "car" and "cone", the keys pointing
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# to "car" would be "ca" and "car", while those pointing to "cone"
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# would be "co", "con", and "cone".
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# strings.
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#
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# Thus, given input of "car" and "cone", the keys pointing to "car" would be
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# "ca" and "car", while those pointing to "cone" would be "co", "con", and
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# "cone".
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#
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# require 'abbrev'
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# require 'pp'
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#
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# pp Abbrev.abbrev(['car', 'cone'])
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# #=> {"ca"=>"car", "con"=>"cone", "co"=>"cone", "car"=>"car", "cone"=>"cone"}
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#
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# The optional +pattern+ parameter is a pattern or a string. Only
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# input strings that match the pattern or start with the string
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# are included in the output hash.
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#
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# pp %w{car box cone}.abbrev(/b/)
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# #=> {"bo"=>"box", "b"=>"box", "box"=>"box"}
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def abbrev(words, pattern = nil)
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table = {}
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seen = Hash.new(0)
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# Calculates the set of unambiguous abbreviations for the strings in
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# +self+.
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#
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# abbr = %w{ car cone }.abbrev
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# abbr #=> { "ca" => "car", "car" => "car",
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# "co" => "cone", "con" => "cone",
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# "cone" => "cone" }
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#
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# The optional +pattern+ parameter is a pattern or a string. Only
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# input strings that match the pattern or start with the string
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# are included in the output hash.
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#
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# %w{ car cone }.abbrev #=> { "ca" => "car", "car" => "car",
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# "co" => "cone", "con" => "cone",
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# "cone" => "cone" }
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# abbr = %w{ fast boat day }.abbrev(/^.a.*$/)
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# abbr #=> {"fas"=>"fast","fa"=>"fast",
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# "da"=>"day", "fast"=>"fast", "day"=>"day"}
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#
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# See also Abbrev#abbrev
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# See also Abbrev.abbrev
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def abbrev(pattern = nil)
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Abbrev::abbrev(self, pattern)
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end
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