实用的JavaScript技巧
1、数组去重
let arr = [...new Set([1,2,3,2,1])];
//输出:[1, 2, 3]
2、删除数组中的虚值(undefined 、null、NaN、0 、'' 、false)
let arr = ['',0,null,50].filter(Boolean);
//输出: [50]
3、合并多个对象
const obj1 = {
name: 'ZHANG SAN',
gender: 'Male'
}
const obj2 = {
age: '18',
gender: 'female'
}
const obj= {...obj1, ...obj2}
//输出:{name: 'ZHANG SAN', gender: 'female', age: '18'}