Taymon Taymon - 7 months ago 4
Ruby Question

Check if two arrays have the same contents

I'm using Ruby 1.8.6 with Rails 1.2.3, and need to determine whether two arrays have the same elements, regardless of whether or not they're in the same order. One of the arrays is guaranteed not to contain duplicates (the other might, in which case the answer is no).

My first thought was

require 'set'
a.to_set == b.to_set


but I was wondering if there was a more efficient or idiomatic way of doing it.

Answer

This doesn't require conversion to set:

a.uniq.sort == b.uniq.sort
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