first repeated character in a string javascript

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showing results for - "first repeated character in a string javascript"
Johanna
24 Apr 2018
1function firstRepeatingCharacter(str) {
2  for (let i = 0; i < str.length; i++) {
3    if (str.indexOf(str.charAt(i)) !== str.lastIndexOf(str.charAt(i))) {
4      return str.charAt(i)
5    }
6  }
7  return 'no results found'
8}
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