如何在Golang中编写isNumeric函数？

Question

I want to check if a string is numeric.

For example:

• "abcd123" should return false.
• "1.4" or "240" should return true.

I thought about using ParseInt and ParseFloat (from the strconv package), but am not sure if that is the right way.

Answer 1

I was thinking of using strconv ParseInt and ParseFloat but not sure if that is the right way.

Well, it's certainly a right way.

You don't need to use ParseInt, though. ParseFloat will do the job.

func isNumeric(s string) bool {
    _, err := strconv.ParseFloat(s, 64)
    return err == nil
}

See an example here: https://play.golang.org/p/D53HRS-KIL