17 lines
294 B
Ruby
17 lines
294 B
Ruby
module Math
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# Returns sum. When a block is given, summation is taken over the
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# each result of block evaluation.
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#
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def self.sum(array) #:yield:
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sum = 0.0
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if block_given?
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array.each{|i| sum += yield(i)}
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else
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array.each{|i| sum += i}
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end
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sum
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end
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end
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