Re: [WebMacro-user] Break or Continue in a whiel loop

[Shane F. <sha...@gm...>]

Thanks Keats for the words of wisdome. I think that has given me everything
I need to finish it off.

The main reason for coding a while loop was to help another developer out.
Maybe #count would have worked better for him.

Shane

On 10/19/06, Keats Kirsch <ke...@xa...> wrote:
>
> The directive code looks pretty clean, but I'd question the need for
> it.  We've discussed a #while directive many times over the years, and I
> have yet to see a use-case that couldn't be handled pretty well by
> #foreach or #count.  The general feeling was always that #while is too
> dangerous because it makes it too easy for a template designer to
> introduce infinite loops.
>
> However I think a #break directive or subdirective might be useful.
> One approach might be to add an option to the directive, like:
>
> #foreach $var in $collection breakon $break {
> #if ($var = "Bad") { #set $break = true }
> }
>
> Then the directive could just check the value of the break variable.
>
> The problem with a break directive is that you would have to deal with
> nested loops.  This could be handled by using labels, like in Java.
>
> #foreach $list in $collection label "outerloop" {
>   #foreach $item in $list {
>      #if ($item = "Bad") { #break "outerloop" }
>   }
> }
>
> This would be harder than the first option, and not any better really
> IMHO.
>
> I don't think #continue would be useful.  It would be difficult to code
> and you can always use an #if instead, which is cleaner anyway.
>
> Keats
>
> Shane Farmer wrote:
> > Hi All,
> >
> > I have been looking around for a while loop to no avail. As such I
> > have implimented a very basic while loop directive. I am using an
> > older version of WM (1.0 or 1.1) and was wondering if it possible to
> > create 2 subdirectives, break and continue, and if anyone would have
> > some pointers on how to go about doing this.
> >
> > The code is _very_ basic ATM and simply loops while ever the
> > conditional arg is true and evaluates [block.write(...)] on the block
> arg.
> >
> > Im am all ears for better design startegies for this directive as well.
> >
> > Thanks in advance
> > Shane
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