482. License Key Formatting 格式化激活码
Posted Long Long Journey
tags:
篇首语:本文由小常识网(cha138.com)小编为大家整理,主要介绍了482. License Key Formatting 格式化激活码相关的知识,希望对你有一定的参考价值。
You are given a license key represented as a string S which consists only alphanumeric character and dashes. The string is separated into N+1 groups by N dashes.
Given a number K, we would want to reformat the strings such that each group contains exactly K characters, except for the first group which could be shorter than K, but still must contain at least one character. Furthermore, there must be a dash inserted between two groups and all lowercase letters should be converted to uppercase.
Given a non-empty string S and a number K, format the string according to the rules described above.
Example 1:
Input: S = "5F3Z-2e-9-w", K = 4 Output: "5F3Z-2E9W" Explanation: The string S has been split into two parts, each part has 4 characters. Note that the two extra dashes are not needed and can be removed.
Example 2:
Input: S = "2-5g-3-J", K = 2 Output: "2-5G-3J" Explanation: The string S has been split into three parts, each part has 2 characters except the first part as it could be shorter as mentioned above.
Note:
- The length of string S will not exceed 12,000, and K is a positive integer.
- String S consists only of alphanumerical characters (a-z and/or A-Z and/or 0-9) and dashes(-).
- String S is non-empty.
/**
* @param {string} S
* @param {number} K
* @return {string}
*/
var licenseKeyFormatting = function (S, K) {
let res = "";
let str = S.replace(/-/g, "");
let groupLength = 0;
for (let i = str.length - 1; i >= 0; i--) {
res = str[i].toUpperCase() + res;
if (++groupLength == K && i != 0) {
res = "-" + res;
groupLength = 0;
}
}
return res;
};
let s = "2-5g-3-J";
let k = 2;
let res = licenseKeyFormatting(s, k);
console.log(res);
以上是关于482. License Key Formatting 格式化激活码的主要内容,如果未能解决你的问题,请参考以下文章
LeetCode_482. License Key Formatting
leetcode 482. License Key Formatting
leetcode-482-License Key Formatting
482. License Key Formatting - LeetCode