[用Golang刷LeetCode之 6] 557. Reverse Words in a String III

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題目

Given a string, you need to reverse the order of characters in each word within a sentence while still preserving whitespace and initial word order.

Example 1:

Input: "Let's take LeetCode contest"
Output: "s'teL ekat edoCteeL tsetnoc"

Note: In the string, each word is separated by single space and there will not be any extra space in the string.

題目大意

給定字串，將每個單詞逐字元逆置，返回新字串。

注意：字串中單詞之間有且只有1個空格分開。

思路

代碼

reverseWords.go

package _557_Reverse_Words3import "strings"func ReverseWord(s string) string {    runes := []rune(s)    for from, to := 0, len(runes)-1; from < to; from, to = from+1, to-1 {        runes[from], runes[to] = runes[to], runes[from]    }    return string(runes)}func ReverseWords(s string) string {    wordArr := strings.Split(s, " ")    var ret string    length := len(wordArr)    for i := 0; i < length; i++ {        reverseWord := ReverseWord(wordArr[i])        if 0 == i {            ret = ret + reverseWord        } else {            ret = ret + " " + reverseWord        }    }    return ret}

測試

reverseWords_test.go

package _557_Reverse_Words3import "testing"func TestReverseWords(t *testing.T) {    ret := ReverseWords("Let's take LeetCode contest")    want := "s'teL ekat edoCteeL tsetnoc"    if ret == want {        t.Logf("pass")    } else {        t.Errorf("fail, want %+v, get %+v", want, ret)    }}