refactor Longest Substring Without Repeating Characters

Author: rihib

go/longest_substring_without_repeating_characters.go

@@ -3,16 +3,16 @@ package main
 
 func lengthOfLongestSubstring(s string) int {
 	maxLen, head := 0, 0
-	using := make(map[byte]struct{})
+	inUse := make(map[byte]struct{})
 	for tail := range s {
-		if _, ok := using[s[tail]]; ok {
+		if _, ok := inUse[s[tail]]; ok {
 			for s[head] != s[tail] {
-				delete(using, s[head])
+				delete(inUse, s[head])
 				head++
 			}
 			head++
 		} else {
-			using[s[tail]] = struct{}{}
+			inUse[s[tail]] = struct{}{}
 		}
 		maxLen = max(maxLen, tail-head+1)
 	}