Trim string's suffix or extension?

go, string

Solution

Edit: Go has moved on. Please see Keith's answer.

Use path/filepath.Ext to get the extension. You can then use the length of the extension to retrieve the substring minus the extension.

var filename = "hello.blah"
var extension = filepath.Ext(filename)
var name = filename[0:len(filename)-len(extension)]

Alternatively you could use strings.LastIndex to find the last period (.) but this may be a little more fragile in that there will be edge cases (e.g. no extension) that `filepath.Ext` handles that you may need to code for explicitly, or if Go were to be run on a theoretical O/S that uses a extension delimiter other than the period.

Problem

For example, I have a string, consists of "sample.zip". How do I remove the ".zip" extension using strings package or other else?

Original source