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How to find the first non-repeated character in a string with JavaScript

2 Answers

0 votes
function getFirstNonRepeatedCharacter(s) {
    for (var i = 0; i < s.length; i++) {
        var ch = s.charAt(i);
        if (s.indexOf(ch) == i && s.indexOf(ch, i + 1) == -1) {
            return ch;
        }
    }
    return null;
}

var s = 'javascript and java';

document.write(getFirstNonRepeatedCharacter(s));


/*
run:

s

*/

 




answered Feb 11 by avibootz
0 votes
function getFirstNonRepeatedCharacter(s) {
    for (var i = 0; i < s.length; i++) {
        if(s.indexOf(s[i]) === s.lastIndexOf(s[i])) {
            return s[i];
        }
    }
    return null;
}

var s = 'javascript and java';

document.write(getFirstNonRepeatedCharacter(s));


/*
run:

s

*/

 




answered Feb 11 by avibootz
...