Index counting from the last char

[Duncan Booth]

gisleyt wrote:

> I'd like to use the index-function to retrieve a certain char in a
> string, but i need it to start counting from the last char.
> 
> E.g. in the string.
> 
> Foo-bar, foo foo-bar
> 
> I want the latter hyphen to be returned when i do a index for '-'. Is
> there any built in function for this, I don't want to reverse every
> string just to do this.
> 
str.rindex