在Tex中,左双引号是“,右双引号是”,输入一篇包含双引号的文章,你的任务是把它转换成Tex的格式. 样例输入: “To be or not to be,”quoth the Bard,"that is the question". 样例输入: +To be or not to be ,*quoth the Bard,+that is the question*. // 其实原版中文是让变成 ''To be or not to be ,”quoth the Bard,''that…
在TeX中,左双引号是“``”,右双引号是“''”.输入一篇包含双引号的文章,你的任务是 把它转换成TeX的格式. 样例输入: "To be or not to be," quoth the Bard, "that is the question". 样例输出: ``To be or not to be,'' quoth the Bard, ``that is the question''. 本题的关键有两个:输入字符串和判断左右括号. 1.输入字符串. 之前学习了…
Remove the minimum number of invalid parentheses in order to make the input string valid. Return all possible results. Note: The input string may contain letters other than the parentheses ( and ). Examples: "()())()" -> ["()()()",…
Given a string of numbers and operators, return all possible results from computing all the different possible ways to group numbers and operators. The valid operators are +, -and *. Example 1 Input: "2-1-1". ((2-1)-1) = 0 (2-(1-1)) = 2 Output: …
Given a string containing just the characters '(' and ')', find the length of the longest valid (well-formed) parentheses substring. For "(()", the longest valid parentheses substring is "()", which has length = 2. Another example is &…
Given n pairs of parentheses, write a function to generate all combinations of well-formed parentheses. For example, given n = 3, a solution set is: "((()))", "(()())", "(())()", "()(())", "()()()" 在LeetCo…
Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. The brackets must close in the correct order, "()" and "()[]{}" are all valid but "(]" and "([)]"…
看完了javaScript数据类型和表达式与运算符相关知识后以为可以对JavaScript笔试题牛刀小试一把了,没想到有一次次的死在逗号,冒号和括号上,不得已再看看这几个符号吧. 逗号 逗号我们常见的用法就是在连续声明一些变量的时候,可以少些很多var var a=1, b=2, c=3; 方法参数我们使用逗号隔开,对象属性也是逗号隔开 function fbn(name,title){} var person={ name:"Byron", age:"24" };…
一.小括号,圆括号() 1.单小括号 () ①命令组.括号中的命令将会新开一个子shell顺序执行,所以括号中的变量不能够被脚本余下的部分使用.括号中多个命令之间用分号隔开,最后一个命令可以没有分号,各命令和括号之间不必有空格. ②命令替换.等同于`cmd`,shell扫描一遍命令行,发现了$(cmd)结构,便将$(cmd)中的cmd执行一次,得到其标准输出,再将此输出放到原来命令.有些shell不支持,如tcsh. ③用于初始化数组.如:array=(a b c d) …
一.不管什么程序,function name(){}, for(){}, ….这太多了,不说也知道什么用了. 二.$str{4}在字符串的变量的后面跟上{}大括号和中括号[]一样都是把某个字符串变量当成数组处理. 三.{$val}这种情况就是我遇到的问题,这时候大括号起的作用就是,告诉PHP,括起来的要当成变量处理. 如下例子: //The following is okay as it's inside a string. Constants are not //looked for with…
