8个编写优秀JS代码的技巧和窍门（分享）

const found = [{ name: "Alex" }].find(i => i.name === 'Jim');

console.log(found.name);

// TypeError: Cannot read property 'name' of undefined

const found = [{ name: "Alex" }].find(i => i.name === 'Jim') || {};

console.log(found.name);

// undefined

const makeList = (raw) =>

  raw

    .join()

    .trim()

    .split("\n")

    .map((s, i) => `${i + 1}. ${s}`)

    .join("\n");

makeList`

Hello, World

Hello, World

`;

// 1. Hello

// 2. World

let a = "hello";

let b = "world";

// 错误 ?

a = b

b = a

// { a: 'world', b: 'world' }

// 正确 ?

[a, b] = [b, a];

// { a: 'world', b: 'hello' }

const password = "hackme";

password.substr(-3).padStart(password.length, "*");

// ***kme