Re: why "function!" instead of just "function"

On Mon, 19 Jan 2015 22:50:49 -0600
Tim Chase <vim@tim.thechases.com> wrote:

> On 2015-01-19 20:31, Bao Niu wrote:
> > I am learning Vimscript and I wonder if there is any difference
> > between writing "function!" vs. "function"? What is that
> > exclamation point for here?
>
> As detailed at
>
> :help E123
>
> If a function already exists with the same name as you want to
> create, the "!" will tell it to overwrite the previously-existing
> function. Thus, you might have
>
> function Hello()
> echo 'Hello'
> endfunction
>
> and then want to change it, so you'd use
>
> function! Hello()
> echoerr 'Hello'
> endfunction
>
> to overwrite it. Because of the behavior, I just use the "!" *every*
> time that I define a function. That way, I don't have to think about
> whether it already exists or not.
>
> -tim

Tim,

Thanks for the complete explanation. I always wondered that myself.

SteveT

Steve Litt * http://www.troubleshooters.com/
Troubleshooting Training * Human Performance

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