自C++11起,我们可以定义 raw string 字符串字面常量. Raw string 允许我们定义所见即所得的字符串字面常量,从而可以省下很多用来修饰特殊 字符的符号. Raw string 以 R"( 开头,以 )" 结尾,可以内含 line break.例如一个用来表示”两个反 斜线和一个n“的寻常字面常量可以定义如下: "\\\\n" 也可以定义它为如下 raw string literal: R"(\\n)" 如果要在 raw st…
Given a string and an integer k, you need to reverse the first k characters for every 2k characters counting from the start of the string. If there are less than k characters left, reverse all of them. If there are less than 2k but greater than or eq…
Given a string containing only three types of characters: '(', ')' and '*', write a function to check whether this string is valid. We define the validity of a string by these rules: Any left parenthesis '(' must have a corresponding right parenthesi…
A character is unique in string S if it occurs exactly once in it. For example, in string S = "LETTER", the only unique characters are "L" and "R". Let's define UNIQ(S) as the number of unique characters in string S. For exam…
Two strings X and Y are similar if we can swap two letters (in different positions) of X, so that it equals Y. For example, "tars" and "rats" are similar (swapping at positions 0 and 2), and "rats" and "arts" are si…
1.js字符串转换成时间 1.1方法一:输入的时间格式为yyyy-MM-dd function convertDateFromString(dateString) { if (dateString) { var date = new Date(dateString.replace(/-/,"/")) return date; } } 1.2方法二:输入的时间格式为yyyy-MM-dd hh:mm:ss function convertDateFromString(dateString…
问题 该文章的最新版本已迁移至个人博客[比特飞],单击链接 https://www.byteflying.com/archives/3933 访问. 编写一个函数,其作用是将输入的字符串反转过来. 输入: "hello" 输出: "olleh" 输入: "A man, a plan, a canal: Panama" 输出: "amanaP :lanac a ,nalp a ,nam A" Write a function t…