reverse words 557

main.go

@@ -0,0 +1,9 @@
+package main
+
+import (
+	"log"
+)
+
+func main() {
+	log.Printf("Hi")
+}

reversewords/readme.md

@@ -0,0 +1,27 @@
+Given a string s, reverse the order of characters in each word within a sentence while still preserving whitespace and initial word order.
+
+ 
+Example 1:
+
+```
+Input: s = "Let's take LeetCode contest"
+Output: "s'teL ekat edoCteeL tsetnoc"
+```
+
+Example 2:
+
+```
+Input: s = "God Ding"
+Output: "doG gniD"
+```
+
+ 
+
+Constraints:
+
+    1 <= s.length <= 5 * 104
+    s contains printable ASCII characters.
+    s does not contain any leading or trailing spaces.
+    There is at least one word in s.
+    All the words in s are separated by a single space.
+

reversewords/reverse.go

@@ -0,0 +1,19 @@
+package reversewords
+
+import "strings"
+
+func reverse(s string) string {
+	result := make([]rune, len(s))
+	for i, v := range s {
+		result[len(result)-i-1] = v
+	}
+	return string(result)
+}
+
+func ReverseWords(s string) string {
+	words := strings.Fields(s)
+	for i, v := range words {
+		words[i] = reverse(v)
+	}
+	return strings.Join(words, " ")
+}

reversewords/reverse_test.go

@@ -0,0 +1,29 @@
+package reversewords_test
+
+import (
+	"fmt"
+	"testing"
+
+	"git.jxs.me/leetgo/reversewords"
+)
+
+func TestExamples(t *testing.T) {
+	cases := map[string]string{
+		"":                            "",
+		"foo":                         "oof",
+		"Hello World":                 "olleH dlroW",
+		"Let's take LeetCode contest": "s'teL ekat edoCteeL tsetnoc",
+	}
+
+	for source, expected := range cases {
+		t.Run(fmt.Sprintf("Check %q", source), func(t *testing.T) {
+			result := reversewords.ReverseWords(source)
+
+			if expected != result {
+				t.Errorf("%q != %q", expected, result)
+			}
+		})
+
+	}
+
+}