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1: #!/usr/bin/env ruby 2: 3: module Enumerable 4: # Reduce has been added to the Ruby 1.7 library 5: def reduce(init) 6: result = init 7: each { |item| result = yield(item, result) } 8: result 9: end 10: end 11: 12: puts [1,2,3,4].reduce(0) { |n, sum| n + sum } 13: puts [1,2,3,4].reduce(1) { |n, prod| n * prod } |
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[ next ] [ prev ] [ contents ] | Copyright 2002 by Jim Weirich. All rights reserved. |