是否有从JavaScript数组中删除项的方法?
给定一个数组:
var ary = ['three', 'seven', 'eleven'];
我想做的事情是:
removeItem('seven', ary);
我已经查看了splice()，但它只删除了位置号，而我需要一些东西来删除其值的项目。
当前回答
//This function allows remove even array from array
var removeFromArr = function(arr, elem) {
var i, len = arr.length, new_arr = [],
sort_fn = function (a, b) { return a - b; };
for (i = 0; i < len; i += 1) {
if (typeof elem === 'object' && typeof arr[i] === 'object') {
if (arr[i].toString() === elem.toString()) {
continue;
} else {
if (arr[i].sort(sort_fn).toString() === elem.sort(sort_fn).toString()) {
continue;
}
}
}
if (arr[i] !== elem) {
new_arr.push(arr[i]);
}
}
return new_arr;
}
使用实例
var arr = [1, '2', [1 , 1] , 'abc', 1, '1', 1];
removeFromArr(arr, 1);
//["2", [1, 1], "abc", "1"]
var arr = [[1, 2] , 2, 'a', [2, 1], [1, 1, 2]];
removeFromArr(arr, [1,2]);
//[2, "a", [1, 1, 2]]
其他回答
在全局函数中，我们不能直接传递自定义值，但有很多方法，如下所示
var ary = ['three', 'seven', 'eleven'];
var index = ary.indexOf(item);//item: the value which you want to remove
//Method 1
ary.splice(index,1);
//Method 2
delete ary[index]; //in this method the deleted element will be undefined
//This function allows remove even array from array
var removeFromArr = function(arr, elem) {
var i, len = arr.length, new_arr = [],
sort_fn = function (a, b) { return a - b; };
for (i = 0; i < len; i += 1) {
if (typeof elem === 'object' && typeof arr[i] === 'object') {
if (arr[i].toString() === elem.toString()) {
continue;
} else {
if (arr[i].sort(sort_fn).toString() === elem.sort(sort_fn).toString()) {
continue;
}
}
}
if (arr[i] !== elem) {
new_arr.push(arr[i]);
}
}
return new_arr;
}
使用实例
var arr = [1, '2', [1 , 1] , 'abc', 1, '1', 1];
removeFromArr(arr, 1);
//["2", [1, 1], "abc", "1"]
var arr = [[1, 2] , 2, 'a', [2, 1], [1, 1, 2]];
removeFromArr(arr, [1,2]);
//[2, "a", [1, 1, 2]]
这样看看:
delete this.arrayName[this.arrayName.indexOf(value)];
参考:https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/delete
//编辑感谢MarcoCI的建议
试试这个:
function wantDelete(item, arr){
for (var i=0;i<arr.length;i++){
if (arr[i]==item){
arr.splice(i,1); //this delete from the "i" index in the array to the "1" length
break;
}
}
}
var goodGuys=wantDelete('bush', ['obama', 'bush', 'clinton']); //['obama', 'clinton']
希望这对你有所帮助
你可以使用Lodash _来实现这一点。删除功能。
Var array = [' 3 '， ' 7 '， ' 11 ']; Var even = _。删除(数组，函数(e) { 返回e !== 'seven'; })； console.log(均等的); <script type="text/javascript" src="https://cdn.jsdelivr.net/npm/lodash@4.17.10/lodash.min.js"></script> .js
