Search & Check

Contains, prefix/suffix, case-insensitive equality

Function	What it does
strings.Contains	Check if string contains substring
strings.ContainsAny	Check if string contains any character from chars
strings.ContainsRune	Check if string contains rune
strings.EqualFold	Case-insensitive string equality
strings.HasPrefix	Check if string starts with prefix
strings.HasSuffix	Check if string ends with suffix