[345] Reverse Vowels of a String
Easy Two Pointers String
Given a string s, reverse only all the vowels in the string and return it.
The vowels are 'a', 'e', 'i', 'o', and 'u', and they can appear in both cases.
Example 1:
Input: s = "hello"
Output: "holle"
Example 2:
Input: s = "leetcode"
Output: "leotcede"
解答
注意byte与string的互相转换
func reverseVowels(s string) string {
if len(s) <= 1 {
return s
}
b := []byte(s)
begin, end := 0, len(b)-1
for begin < end {
if !isVowel(b[begin]) {
begin++
continue
}
if !isVowel(b[end]) {
end--
continue
}
b[begin], b[end] = b[end], b[begin]
begin++
end--
}
return string(b)
}
func isVowel(c byte) bool {
if c < 'a' {
c += 32
}
return c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u'
}
注意byte与string, byte与rune之间的互相转换
func reverseVowels(s string) string {
if len(s) <= 1 {
return s
}
vowels := "aeiouAEIOU"
vowelMap := make(map[byte]bool)
for _, val := range vowels {
vowelMap[byte(val)] = true
}
b := []byte(s)
begin, end := 0, len(s)-1
for begin < end {
if !vowelMap[b[begin]] {
begin++
continue
}
if !vowelMap[b[end]] {
end--
continue
}
b[begin], b[end] = b[end], b[begin]
begin++
end--
}
return string(b)
}
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- Rust Is The Future of JavaScript Infrastructure
- Hacker News: Rust Is the Future of JavaScript Infrastructure (leerob.io)
- rust-fe
- Golang has integer types called byte and rune that are aliases for uint8 and int32 data types
- The byte data type represents ASCII characters while the rune data type represents a more broader set of Unicode characters that are encoded in UTF-8 format.
- The default type for character values is rune
-
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-
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