我们可以使用筛选器和包含来实现逻辑

const checkAlpha2Code = ['BD', 'NZ', 'IN'] let countryAlpha2Code = ['US', 'CA', 'BD', 'NZ', 'AF' , 'AR' , 'BR'] /** * Returns the modified array countryAlpha2Code * after removing elements which matches with the checkAlpha2Code */ countryAlpha2Code = countryAlpha2Code.filter(alpha2code => { return !checkAlpha2Code.includes(alpha2code); }); console.log(countryAlpha2Code) // Output: [ 'US', 'CA', 'AF', 'AR', 'BR' ] // Resetting the values again countryAlpha2Code = ['US', 'CA', 'BD', 'NZ', 'AF' , 'AR' , 'BR'] /** * Returns the modified array countryAlpha2Code * which only matches elements with the checkAlpha2Code */ countryAlpha2Code = countryAlpha2Code.filter(alpha2code => { return checkAlpha2Code.includes(alpha2code); }); console.log(countryAlpha2Code) // Output: [ 'BD', 'NZ' ]

_.pull(array,'a'); 

使用lib lodash https://lodash.com/docs/4.17.15#pull complelte代码:

import _ from 'lodash';
const allTagList = ['a','b','b']
_.pull(allTagList, b);
console.log(allTagList) // result: ['a']

PS: Lodash提供了大量的操作符，建议使用它来简化您的代码。https://lodash.com

这是我的解决方案:

onDelete(id: number) {
    this.service.delete(id).then(() => {
        let index = this.documents.findIndex(d => d.id === id); //find index in your array
        this.documents.splice(index, 1);//remove element from array
    });

    event.stopPropagation();
}

可以在数组上使用splice方法删除元素。

例如，如果你有一个名为arr的数组，使用以下方法:

arr.splice(2, 1);

因此，这里索引为2的元素将是起点，参数2将决定删除多少个元素。

如果你想删除名为arr的数组的最后一个元素，那么这样做:

arr.splice(arr.length-1, 1);

这将返回删除最后一个元素的arr。

例子:

var arr = ["orange", "mango", "banana", "sugar", "tea"];
arr.splice(arr.length-1, 1)
console.log(arr); // return ["orange", "mango", "banana", "sugar"]

使用TypeScript扩展运算符(…)

// Your key
const key = 'two';

// Your array
const arr = [
    'one',
    'two',
    'three'
];

// Get either the index or -1
const index = arr.indexOf(key); // returns 0


// Despite a real index, or -1, use spread operator and Array.prototype.slice()    
const newArray = (index > -1) ? [
    ...arr.slice(0, index),
    ...arr.slice(index + 1)
] : arr;

Let departments是一个数组。您要从此数组中删除一项。

departments: string[] = [];

 removeDepartment(name: string): void {
    this.departments = this.departments.filter(item => item != name);
  }