Remove duplicate item from array Javascript [duplicate]

Answer 1

You can do this easily with just an object:

function removeDuplicates(text) {
    var seen = {};
    var result = '';

    for (var i = 0; i < text.length; i++) {
        var char = text.charAt(i);

        if (char in seen) {
            continue;
        } else {
            seen[char] = true;
            result += char;
        }
    }

    return result;
}

function cleanUp() {
    var elem = document.getElementById("fld");

    elem.value = removeDuplicates(elem.value);
}