Kata

There is an array of strings. All strings contains similar letters except one. Try to find it!

findUniq([ 'Aa', 'aaa', 'aaaaa', 'BbBb', 'Aaaa', 'AaAaAa', 'a' ]) === 'BbBb'
findUniq([ 'abc', 'acb', 'bac', 'foo', 'bca', 'cab', 'cba' ]) === 'foo'

find_uniq([ 'Aa', 'aaa', 'aaaaa', 'BbBb', 'Aaaa', 'AaAaAa', 'a' ]); // => 'BbBb'
find_uniq([ 'abc', 'acb', 'bac', 'foo', 'bca', 'cab', 'cba' ]); // => 'foo'

find_uniq([ 'Aa', 'aaa', 'aaaaa', 'BbBb', 'Aaaa', 'AaAaAa', 'a' ]) # => 'BbBb'
find_uniq([ 'abc', 'acb', 'bac', 'foo', 'bca', 'cab', 'cba' ]) # => 'foo'

      FindUniq([ 'Aa', 'aaa', 'aaaaa', 'BbBb', 'Aaaa', 'AaAaAa', 'a' ])
      * => result = 'BbBb'
      FindUniq([ 'abc', 'acb', 'bac', 'foo', 'bca', 'cab', 'cba' ])
      * => result = 'foo'

Strings may contain spaces. Spaces are not significant, only non-spaces symbols matters. E.g. string that contains only spaces is like empty string.

It’s guaranteed that array contains more than 2 strings.

This is the second kata in series:

1. Find the unique number
2. Find the unique string (this kata)
3. Find The Unique