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values = [ "a", "b", "c", "a", "d" ]
 
p values.each_index.select {|i| values[i] == 'a'}
p values.size.times.select {|i| values[i] == 'a'}

Success #stdin #stdout 0.02s 9656KB

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Standard input is empty

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[0, 3]
[0, 3]

https://ideone.com/XFd3bz

language:

Ruby (ruby 2.5.5)

created:

visibility:

public

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