javascript indexofany

javascript indexofany

String.prototype.indexOfAny = function (anyOf /*Array*/, startIndex /*uint*/, count /*int*/) /*int*/ {


    startIndex = isNaN(startIndex) ? 0 : startIndex;
    if (startIndex < 0) {
        startIndex = 0;
    }

    if (this == null || this == "") return -1;
    count = isNaN(count) ? -1 : ((count >= 0) ? count : -1);
    var l = this.length;
    var endIndex /*int*/;
    if ((count < 0) || (count > l - startIndex)) {
        endIndex = l;
    }
    else {
        endIndex = startIndex + count;
    }

    if (anyOf == null || anyOf == undefined) return -1;

    for (var i = startIndex; i <= endIndex ; i++) {
        var curtxt = this.substring(startIndex, i);

        var allindex = [];
        for (var j = 0; j < anyOf.length; j++) {
            var any = anyOf[j];
            var index = curtxt.indexOf('' + any);
            if (index > -1) {
                return index + startIndex;
            }
        }
    }

    return -1;

};

var str = "1234567890a";
window.alert(str.substring(0,1));
window.alert(str.indexOfAny(["a", "21"], 0, 11));
//window.alert(str.indexOfAny(["a", "11"], 0, 11));