String字符串去重复

String字符串去重复

function splitAndRemoveDuplicate(str, symbol) {
    var arr = str.split(symbol);
    var result = [], hash = {};
    for (var i = 0, elem; (elem = arr[i]) != null; i++) {
        println("for进来了" + i + "次");
        if (!hash[elem]) {
            println("!hash[elem]进来了" + i + "次");
            result.push(elem);
            hash[elem] = true;
        }
    }
    return "" + result;
}