Re: Repeat argument N times?

[Mikael Magnusson <mikachu@xxxxxxxxx>]

On 30 July 2014 08:48, Bart Schaefer <schaefer@xxxxxxxxxxxxxxxx> wrote:
> On Jul 29, 11:12pm, Benjamin R. Haskell wrote:
> }
> } Is there a built-in way to repeat an argument N times?
>
> Not really.  You have to admit it's a rather unusual thing to do.  It
> can be done by abusing other expansions, as you've discovered.
>
> } It'd be nice if I could write (something like):
> }
> }     upload-files file1(N3) file2(N10) file3(N4)
>
> You can create an array of N empty elements just by assigning to the
> Nth position:
>
>     N[100]=()
>
> And then:
>
>     upload-files file1$^N[1,3] file2$^N[1,10] file3$^N[1,4]
>
> Works up to however much memory you're willing to waste on allocating
> empty array slots.
>
> There are other ways, e.g.
>
>     upload-files file2${^${:-{1..10}}/*/}
>
>     upload-files file2(e{'repeat 10 reply+=($REPLY)'})
>
> though the latter requires "file2" to actually exist, which sometimes
> might be a good thing.

Here's another minor variation on the first one,
upload-files file1${(s: :)^${(l:50:)}}

-- 
Mikael Magnusson