Update: Reverse String #209

Original file line number	Diff line number	Diff line change
		@@ -1,9 +1,7 @@
		package reverse_string

	func reverseString(s string) string {
	runes := []rune(s)
	for i, j := 0, len(runes)-1; i < j; i, j = i+1, j-1 {
	runes[i], runes[j] = runes[j], runes[i]
	func reverseString(s []byte) {
	for i, j := 0, len(s)-1; i < j; i, j = i+1, j-1 {
	s[i], s[j] = s[j], s[i]
		}
	return string(runes)
		}

34 changes: 24 additions & 10 deletions problems/reverse-string/reverse_string_test.go

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Original file line number	Diff line number	Diff line change
		@@ -1,18 +1,32 @@
		package reverse_string

	import "testing"
	import (
	"reflect"
	"testing"
	)

	type caseType struct {
	input []byte
	expected []byte
	}

		func TestReverseString(t *testing.T) {
	tests := map[string]string{
	"hello, world": "dlrow ,olleh",
	"你好,世界": "界世,好你",
	"A man, a plan, a canal: Panama": "amanaP :lanac a ,nalp a ,nam A",
	tests := [...]caseType{
	{
	input: []byte{'h', 'e', 'l', 'l', 'o'},
	expected: []byte{'o', 'l', 'l', 'e', 'h'},
	},
	{
	input: []byte{'H', 'a', 'n', 'n', 'a', 'h'},
	expected: []byte{'h', 'a', 'n', 'n', 'a', 'H'},
	},
		}

	for input, expected := range tests {
	output := reverseString(input)
	if output != expected {
	t.Fatalf("input: %v, output: %v, expected: %v", input, output, expected)
	for _, tc := range tests {
	output := make([]byte, len(tc.input))
	copy(output, tc.input)
	reverseString(output)
	if !reflect.DeepEqual(output, tc.expected) {
	t.Fatalf("input: %v, output: %v, expected: %v", tc.input, output, tc.expected)
		}
		}
		}

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