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Detect Capital

Created

2022/01/24 02:35

문제 번호

520

카테고리

String

Detect Capital - LeetCode

We define the usage of capitals in a word to be right when one of the following cases holds: All letters in this word are capitals, like "USA". All letters in this word are not capitals, like "leetcode". Only the first letter in this word is capital, like "Google".

https://leetcode.com/problems/detect-capital/

Code

제출 날짜	시간	메모리
2022/01/24	0 ms	2.1 MB

// 520. Detect Captial
//
// https://leetcode.com/problems/detect-capital/

// detectCapitalUse function checks whether the string follows the captial rules or not.
// To return true, one of the rule should be satisfied. Or, return false.
// 1. All capital letters.
// 2. Only the first capital letter.
// 3. All non-capital letters.
// Divide into 2 cases and iterate own way.
// If the length of the word is 1, then it is always true.
func detectCapitalUse(word string) bool {
	if len(word) == 1 {
		return true
	}
	if unicode.IsUpper(rune(word[0])) {
		keepUpper := unicode.IsUpper(rune(word[1]))
		for i := 2; i < len(word); i++ {
            if keepUpper != unicode.IsUpper(rune(word[i])) {
				return false
			}
		}
	} else {
		for _, ch := range word {
			if unicode.IsUpper(rune(ch)) {
				return false
			}
		}
	}
	return true
}
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