Case insensitive HasSuffix in Go

Question

I am looking for specific file types from a directory listing and use HasSuffix to do the comparision looking for a few specific file types. I would like to make this comparison case insensitive.

Is there a way to add EqualFold or another case insensitive comparison to the HasSuffix function?

Answer 1

You could just use

if strings.HasSuffix(strings.ToLower(s), "suffix") {
    // do something 
}

You can also write your own wrapper function:

func hasSuffix(s, suffix string, caseSensitive bool) bool {
    if caseSensitive {
        return strings.HasSuffix(s, suffix)
    }
    return strings.HasSuffix(strings.ToLower(s), suffix)
}

For file names or paths you can use (see answer of PeterSO):

if strings.ToLower(filepath.Ext(s)) == ".fileending" {
    // do something
}