Sha256: 010114d67904cb99747ea29aa1620210a35bd53bb0c312b2a311f1db220570b2
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Size: 983 Bytes
Versions: 17
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Stored size: 983 Bytes
Contents
module Earthquake
module IdVar
attr_accessor :id_var
def id2var(id)
id_var.id2var(id)
end
def var2id(var)
id_var.var2id(var)
end
class Gen
def initialize(vars = "aa".."zz", prefix = "$")
unless Range === vars and String === vars.first
raise ArgumentError, "vars should be a Range of String"
end
@vars = vars
@var = @vars.last.dup
@table = ActiveSupport::Cache::MemoryStore.new
@prefix = prefix
end
def var2id(var)
@table.read(var)
end
def id2var(id)
@table.read(id) || succ(id)
end
private
def succ(id)
@var.replace(@vars.first.dup) unless @vars.include?(@var.next!)
var = @prefix + @var
@table.delete(@table.read(var))
@table.write(var, id)
@table.write(id, var)
var.dup
end
end
end
extend IdVar
init do
self.id_var ||= IdVar::Gen.new
end
end
Version data entries
17 entries across 17 versions & 1 rubygems