Question

我正在使用上面的代码并删除基于id的项目当我达到最大数组长度时，我在比较i + 1项时没有定义id。感谢你的帮助......

var arr = [{"id":"0-block-0","left":206.5,"top":0},{"id":"0-block-1","left":446.5,"top":0},{"id":"0-block-2","left":474.5,"top":16},{"id":"0-block-2","left":686.5,"top":0}];

    Expecting outout = [{"id":"0-block-0","left":206.5,"top":0},{"id":"0-block-1","left":446.5,"top":0},{"id":"0-block-2","left":686.5,"top":0}]


    Array.prototype.unique = function(){                                    
        var passNum = this.length;
        var _self = this;
        // to repeat loops n*n times
        while(passNum>0){       
             for(var i = 0;i<this.length;i++) {                   
                 if(this[i].id==this[i+1].id){
                        var _indx = this.indexOf(this[i]);
                        this.splice(_indx,1);            
                }                            
            }                   
            passNum = passNum-1;
        }          
        return this;
    };

Answer 1

您可以使用ES2015套件执行此操作。

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set

编辑：如果您无法使用ES2015，则可以使用polyfill。

如何在javascript中从数组中删除重复的对象

1 个答案: