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Commit 8f64507

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Merge pull request #188 from gostool/leetcode0520
Leetcode0520
2 parents d9a9759 + 0ef19c8 commit 8f64507

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package leetcode
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import "strings"
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func detectCapitalUse(word string) bool {
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wLower := strings.ToLower(word)
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wUpper := strings.ToUpper(word)
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wCaptial := strings.ToUpper(string(word[0])) + strings.ToLower(string(word[1:]))
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if wCaptial == word || wLower == word || wUpper == word {
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return true
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}
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return false
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}
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package leetcode
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import (
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"fmt"
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"testing"
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)
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type question520 struct {
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para520
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ans520
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}
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// para 是参数
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type para520 struct {
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word string
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}
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// ans 是答案
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type ans520 struct {
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ans bool
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}
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func Test_Problem520(t *testing.T) {
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qs := []question520{
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{
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para520{"USA"},
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ans520{true},
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},
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{
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para520{"FlaG"},
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ans520{false},
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},
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}
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fmt.Printf("------------------------Leetcode Problem 520------------------------\n")
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for _, q := range qs {
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_, p := q.ans520, q.para520
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fmt.Printf("【input】:%v 【output】:%v\n", p, detectCapitalUse(p.word))
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}
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fmt.Printf("\n\n\n")
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}

‎leetcode/0520.Detect-Capital/README.md

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# [520. Detect Capital](https://leetcode-cn.com/problems/detect-capital/)
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## 题目
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We define the usage of capitals in a word to be right when one of the following cases holds:
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All letters in this word are capitals, like "USA".
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All letters in this word are not capitals, like "leetcode".
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Only the first letter in this word is capital, like "Google".
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Given a string word, return true if the usage of capitals in it is right.
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**Example 1:**
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```
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Input: word = "USA"
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Output: true
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```
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**Example 2:**
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```
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Input: word = "FlaG"
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Output: false
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```
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**Constraints:**
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- 1 <= word.length <= 100
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- word consists of lowercase and uppercase English letters.
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## 题目大意
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我们定义,在以下情况时,单词的大写用法是正确的:
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全部字母都是大写,比如 "USA" 。
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单词中所有字母都不是大写,比如 "leetcode" 。
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如果单词不只含有一个字母,只有首字母大写,比如"Google" 。
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给你一个字符串 word 。如果大写用法正确,返回 true ;否则,返回 false 。
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## 解题思路
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- 把word分别转换为全部小写wLower,全部大写wUpper,首字母大写的字符串wCaptial
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- 判断word是否等于wLower,wUpper,wCaptial中的一个,如果是返回true,否则返回false
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## 代码
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```go
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package leetcode
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import "strings"
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func detectCapitalUse(word string) bool {
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wLower := strings.ToLower(word)
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wUpper := strings.ToUpper(word)
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wCaptial := strings.ToUpper(string(word[0])) + strings.ToLower(string(word[1:]))
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if wCaptial == word || wLower == word || wUpper == word {
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return true
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}
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return false
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}
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```

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