const newArray = oldArray.filter(item => item !== removeItem);

很简单,只要做:

var arr = [1,2,4,5];
arr.splice(arr.indexOf(5), 1);
console.log(arr); // [1,2,4];

let removeAnElement = (arr, element)=>{
    let findIndex = -1;
    for (let i = 0; i<(arr.length); i++){
        if(arr[i] === element){
            findIndex = i;
            break;
        }
    }
    if(findIndex == -1){
        return arr;
    }
    for (let i = findIndex; i<(arr.length-1); i++){
        arr[i] =  arr[i+1];
    }
    arr.length -= 1;
    return arr;
}

let array = ['apple', 'ball', 'cat', 'dog', 'egg'];
let removeElement = 'ball';

let tempArr2 = removeAnElement(array, 'dummy');
console.log(tempArr2);
// ['apple', 'cat', 'dog', 'egg']

let tempArr = removeAnElement(array, removeElement);
console.log(tempArr);`enter code here`
// ['apple', 'cat', 'dog', 'egg']

除了所有这些解决方案之外, 它也可以用阵列来完成. 减量...

const removeItem = 
    idx => 
    arr => 
    arr.reduce((acc, a, i) =>  idx === i ? acc : acc.concat(a), [])

const array = [1, 2, 3]
const index = 1

const newArray = removeItem(index)(array) 

console.log(newArray) // logs the following array to the console : [1, 3]

...或者一个循环函数(诚实地说不是那么优雅...也许有人有更好的循环解决方案? ? )...

const removeItemPrep = 
    acc => 
    i => 
    idx => 
    arr => 

    // If the index equals i, just feed in the unchanged accumulator(acc) else...
    i === idx ? removeItemPrep(acc)(i + 1)(idx)(arr) :

    // If the array length + 1 of the accumulator is smaller than the array length of the original array concatenate the array element at index i else... 
    acc.length + 1 < arr.length ? removeItemPrep(acc.concat(arr[i]))(i + 1)(idx)(arr) : 

    // return the accumulator
    acc 

const removeItem = removeItemPrep([])(0)

const array = [1, 2, 3]
const index = 1

const newArray = removeItem(index)(array) 

console.log(newArray) // logs the following array to the console : [1, 3]

您可以使用 JavaScript 的标准 __ proto__ 来定义此函数。例如,

让数据 = [;] 数据 .__proto__.remove = (n) { {数据 = 数据 : blockMap ((v) ) { { 返回 v ? v : [] n? v ; 数据 = [1, 2, 3] ; 数据 = [1, 2, 3] ; 数据.remove (2); 控制台.log(数据); / / [1,3] 数据 = [a', b', c'] ; 数据.remove ('b'); 控制台.log(数据); // [a, c]

您可以使用 Set 代替并使用删除函数 :

const s = Set;
s.add('hello');
s.add('goodbye');
s.delete('hello');