[DOC]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@54578 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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6
array.c
6
array.c
@ -5667,9 +5667,13 @@ rb_ary_dig(int argc, VALUE *argv, VALUE self)
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* [].sum(0.0) #=> 0.0
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* [1, 2, 3].sum #=> 6
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* [3, 5.5].sum #=> 8.5
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* [2.5, 3.0].sum(0.0) {|v| v * v } #=> 15.25
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* [2.5, 3.0].sum(0.0) {|e| e * e } #=> 15.25
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* [Object.new].sum #=> TypeError
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*
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* The (arithmetic) mean value of an array can be obtained* as follows.
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*
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* mean = ary.sum(0.0) / ary.length
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*
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* This method may not respect method redefinition of "+" methods
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* such as Fixnum#+.
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*
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