js 数组 distinct

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;

}

//for test

alert(['a','b','c','d','b','a','e'].distinct());

 

有点意思