distinct/uniq test

distinct Method

Array.prototype.distinct = function() {
  var ret = [];
  for (var i = 0; i < this.length; i++) {
    for (var j = i+1; j < this.length;) {
      if (this[i] === this[j]) {
        ret.push(this.splice(j, 1)[0]);
      } else {
        j++;
      }
    }
  }
  return ret;
}

uniq_slow Method

Array.prototype.uniq_slow = function(){
    var ret = [],
        i = 0,
        j = 0;
    while (undefined !== this[i]){
        j = i + 1;
        while(undefined !== this[j]){
            if (this[i] == this[j]){
                ret.push(this.splice(j, 1)[0]);
            } else {
                ++j;
            }
        }
        ++i;
    }
    return ret;
}

uniq Method

Array.prototype.uniq = function(){
    var resultArr = [],
        returnArr = [],
        i = 1,
        origLen = this.length,
        resultLen;
    function include(arr, value){
        for (var i=0, n=arr.length; i<n; ++i){
            if (arr[i] === value){
                return true;
            }
        }
        return false;
    }
    resultArr.push(this[0]);
    for (i; i<origLen; ++i){
        if (include(resultArr, this[i])){
            returnArr.push(this[i]);
        } else {
            resultArr.push(this[i]);
        }
    }
    resultLen = resultArr.length;
    this.length = resultLen;
    for (i=0; i<resultLen; ++i){
        this[i] = resultArr[i];
    }
    return returnArr;
}