在大写字母之间添加空格

Question

I have string like this ClientLovesProcess I need to add a space between each uppercase letter except for the first uppercase letter so the end result would be this Client Loves Process

I don't think golang has the best string support but this is how I was thinking about going about it:

First loop through each letter so something like this:

name := "ClientLovesProcess"

wordLength := len(name)

for i := 0; i < wordLength; i++ {
    letter := string([]rune(name)[i])

    // then in here I would like to check
   // if the letter is upper or lowercase

   if letter == uppercase{
       // then break the string and add a space
   }
}

The issue is I don't know how to check if a letter is lower or uppercase in go. I checked the strings manual but they don't some to have a function for it. What would be another approach to get this done with go?

Answer 1

The function you're looking for is unicode.IsUpper(r rune) bool.

I would use a bytes.Buffer so that you're not doing a bunch of string concatenations, which results in extra unnecessary allocations.

Here's an implementation:

func addSpace(s string) string {
    buf := &bytes.Buffer{}
    for i, rune := range s {
        if unicode.IsUpper(rune) && i > 0 {
            buf.WriteRune(' ')
        }
        buf.WriteRune(rune)
    }
    return buf.String()
}

And a play link.