De-sum 2 #35
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De-sum 2 #35
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jones-agyemang
approved these changes
Apr 6, 2018
| @@ -2,7 +2,7 @@ class Array | |||
| def entropy | |||
| each_with_object(Hash.new(0)) do |i, result| | |||
| result[i] += 1 | |||
| end.values.sum do |count| | |||
| end.values.inject(0, :+) do |count| | |||
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sum is clearer than inject(0, :+). However, sum without a block will not work. This is a valid fix.
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I think it was because sum didn't exist outside of Rails / activesupport, but in my environment I had those and so I didn't notice this.
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Hmm, it is part of the Array: https://ruby-doc.org/core-2.4.0/Array.html#method-i-sum
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True, in 2.4.0 ;)
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