LeetCode題目: 3. Longest Substring Without Repeating Characters My solution: /** * @param {string} s * @return {number} */ let lengthOfLongestSubstring = ...

LeetCode題目: 1. Two Sum My solution: /** * @param {number[]} nums * @param {number} target * @return {number[]} */ let twoSum = function(nums, target) {...

//方法一: 使用Promise的then方法 let fakeAjax = (url, sec) => new Promise((resolve, reject) => { setTimeout(() => { resolve(`Ajax ${url} OK!`); ...

//arugumets是個神奇的語法，就算定義的function括號裡面不設定參數，arguments還是會儲存呼叫自己函式時裡面所帶的參數，是以類似陣列的物件儲存，此語法只能在function內使用。 function child() { console.log("(arguments)呼叫ch...

//只要是宣告過後的變數都不能刪除! 如:var、let、const、function，什麼意思呢? 舉例如下: var thisVar = "I'm Var"; delete thisVar; //return false let thisLet = "I'...