JavaScript开发的七个实用小技巧(很有用)

let numbers = [2, 52, 55, 5];
let sum = numbers.reduce((x, y) => x + y);
console.log(sum); // 114

let array = [11,12,12,122,1222];
console.log(array.length); // 5
array.length = 2;
console.log(array); // [11, 12]

let array = [11, 12, 13, 14, 150, 15, 555, 556, 545];
let randomArray = array.sort(function() {
  return Math.random() - 0.5
});
console.log(randomArray); // [150, 545, 15, 14, 11, 12, 13, 556, 555]
// 当然，生成的随机值，你每次运行代码都会有有所不同，上面的 console.log 我只是取了其中一种

let array = [11, 12, 12, 222];
const unique = [...new Set(array)];
console.log(unique); // [11, 12, 222]

let x = 1;
x = (x++, x);
console.log(x); // 2

x = (2, 3);
console.log(x); // 3

let temporary = b;
b = a;
a = temporary;

let x = 5;
let y = 10;
[x, y] = [y, x];
console.log(x); // 10
console.log(y); // 5

// 使用 if 的条件判断
if(twitter) {
  followme("adarsh____gupta")
}

// 你可以替换成这样
twiiter && followme("adarsh____gupta")