String.prototype.repeatOpt = function () {
var str = this + "",objStr = "";
for (var i = 0; i < this.length; i++) {
var s = str[i];
var newStr = str.replace(s, '');
var j = newStr.indexOf(s);
if (j == -1) {
objStr += s;
}
}
return objStr;
}
alert("BWABSDWD".repeatOpt());
String.prototype.repeatOpt = function () {
var thisString = this;
var newString = "";
var arrWord = new Array(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
for (var i = 0; i < this.length; i++) {
arrWord[thisString[i].charCodeAt() - 65]++;
}
for (var i = 0; i < arrWord.length; i++) {
if (arrWord[i] == 1) {
newString += String.fromCharCode(i + 65);
}
}
return newString;
}
alert("BWABSDWD".repeatOpt());
var arrWord = new Array(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
