如何使用 JavaScript 从数组中删除对象? [英] How do I remove an object from an array with JavaScript?

问题描述

我有一个这样的 JavaScript 对象:

I have an JavaScript object like this:

id="1";
name = "serdar";

我有一个包含上述许多对象的数组.如何从该数组中删除一个对象，例如:

and I have an Array which contains many objects of above. How can I remove an object from that array such as like that:

obj[1].remove();

推荐答案

splice 很好用:

var arr = [{id:1,name:'serdar'}];
arr.splice(0,1);
// []

不要在数组上使用 delete 运算符.delete 不会从数组中删除一个条目，它只会用 undefined 替换它.

Do NOT use the delete operator on Arrays. delete will not remove an entry from an Array, it will simply replace it with undefined.

var arr = [0,1,2];
delete arr[1];
// [0, undefined, 2]

但也许你想要这样的东西?

But maybe you want something like this?

var removeByAttr = function(arr, attr, value){
    var i = arr.length;
    while(i--){
       if( arr[i] 
           && arr[i].hasOwnProperty(attr) 
           && (arguments.length > 2 && arr[i][attr] === value ) ){ 

           arr.splice(i,1);

       }
    }
    return arr;
}

下面只是一个例子.

var arr = [{id:1,name:'serdar'}, {id:2,name:'alfalfa'},{id:3,name:'joe'}];
removeByAttr(arr, 'id', 1);   
// [{id:2,name:'alfalfa'}, {id:3,name:'joe'}]

removeByAttr(arr, 'name', 'joe');
// [{id:2,name:'alfalfa'}]

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