数组去重

简单数据去重

        var arrs = [1,11,22,1,11,22,3,4,589,41,62,15,32,22,3,5,15,62,41,892];

        Array.prototype.unique = function (){
            var temp = {},
                _arr = [],
                len = this.length;
            for (var i = 0; i < len; i++) {
                if(!temp[this[i]]){
                    temp[this[i]] = this[i];
                    _arr.push(this[i]);
                }
            }
            return _arr;
        }
        console.log(arr.unique());

简单数据去重

复杂数据根据参数去重

        var arr = [
            { id: 11, title: '123' },
            { id: 2, title: '456' },
            { id: 11, title: '123' },
            { id: 3, title: '123' },
            { id: 2, title: '456' },
            { id: 1, title: '5' },
            { id: 4, title: '789' },
            { id: 4, title: '789' },
            { id: 3, title: '123' }
        ];
        Array.prototype.attributeUnique = function(type){
            var temp = {},
                _arr = [],
                len = this.length;
            for (var i = 0; i < len; i++) {
                if(!temp[this[i][type]]){
                    temp[this[i][type]] = this[i][type];
                    _arr.push(this[i]);
                }
            }
            return _arr;
        }

        // 根据ID去重
        console.log(arrs.attributeUnique('id'));

ID去重

        // 根据Title去重
        console.log(arrs.attributeUnique('title'));

Title去重