標籤:javascript要點:1、typeof操作符 var box=false;alert(typeof box );2、Undefined類型 var box;//undefined類型alert(box) 3、Null類型 alert(undefined==null)//undefined是派生自null的,因此它們兩個相等,返回true4、Boolean類型 var box
標籤:https://leetcode.com/problems/valid-parentheses/Valid Parentheses Given a string containing just the characters ‘(‘, ‘)‘, ‘{‘, ‘}‘, ‘[‘ and ‘]‘, determine if the input string is valid.The brackets must
標籤:原貼地址:http://pierrespring.com/2010/05/11/function-scope-and-lexical-scoping/個人覺得寫得不錯,簡單地搬運,如有錯誤,請指正。 Wikipedia defines Scope as follows: Tipically, scope is used to define the extent of information hiding--that is, the visibility or
標籤:https://leetcode.com/problems/remove-nth-node-from-end-of-list/Remove Nth Node From End of ListGiven a linked list, remove the nth node from the end of list and return its head.For example, Given linked list: 1->2->3->4->5,
標籤:JavaScript 是一種解釋性語言。Python也是一種解釋性語言。對於解釋性語言,需要瞭解該語言的Integrated Development Environment,比如命令列。Python中的sync, for x in [1,2,3,4,5,6,7,8,9,0] y = 0 while y < 1000000: y += 1 print xJavaScript中的Async: fs =
標籤:https://leetcode.com/problems/jump-game/Jump GameGiven an array of non-negative integers, you are initially positioned at the first index of the array.Each element in the array represents your maximum jump length at that position.Determine if you
標籤:javascript web 在牛腩新聞發布系統中我們曾經接觸過JavaScript和JQuery這兩個概念,但是具體是什麼呢?那時候只是簡單的瞭解了一下,並沒有作深入的研究。而隨著我們學習的深入,所接觸的東西也就越來越深入,現在也就開始了JavaScript的詳細學習。 這部分的學習視頻大概是150集,
標籤:https://leetcode.com/problems/longest-valid-parentheses/Longest Valid ParenthesesGiven a string containing just the characters ‘(‘ and ‘)‘, find the length of the longest valid (well-formed) parentheses substring.For "(()",
標籤:Related to question Excel Sheet Column TitleGiven a column title as appear in an Excel sheet, return its corresponding column number.For example: A -> 1 B -> 2 C -> 3 ... Z -> 26 AA -> 27 AB -> 28
標籤:https://leetcode.com/problems/insert-interval/Insert IntervalGiven a set of non-overlapping intervals, insert a new interval into the intervals (merge if necessary).You may assume that the intervals were initially sorted according to
標籤:https://leetcode.com/problems/number-of-1-bits/Number of 1 BitsWrite a function that takes an unsigned integer and returns the number of ’1‘ bits it has (also known as the Hamming weight).For example, the 32-bit integer ’11‘ has
標籤:https://leetcode.com/problems/majority-element/Majority ElementGiven an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times.You may assume that the