array -> list

[Wybo Dekker]

Is there a way to convert an array to a (parameter-)list?

I often find myself doing things like:

year,mon,day,hour,minute = ParseDate.parse(datestring)
printf("%04d-%02d-%02d %02d:%02d\n",year,mon,day,hour,minute)

while it would be a lot nicer to do:

printf("%04d-%02d-%02d %02d:%02d\n", ParseDate.parse(datestring)

It is of course perfectly possible to redefine printf and make it check
whether it is offered an array or a parameter list, but it would be a lot
easier when ruby did so automatically.

Alternatively, there could be something like Array#flatten which flattens
an array to a list.

--
Wybo

[ts]

>>>>> "W" == Wybo Dekker <wybo@servalys.nl> writes:

W> printf("%04d-%02d-%02d %02d:%02d\n", ParseDate.parse(datestring)

svg% ruby -rparsedate \

> -e 'printf("%04d-%02d-%02d %02d:%02d\n", *ParseDate.parsedate(Time.now.to_s))'

2003-11-15 13:31
svg%


Guy Decoux

[gabriele renzi]

il Sat, 15 Nov 2003 21:23:09 +0900, Wybo Dekker <wybo@servalys.nl> ha
scritto::

>Is there a way to convert an array to a (parameter-)list?
>
>I often find myself doing things like:
>
> year,mon,day,hour,minute = ParseDate.parse(datestring)
> printf("%04d-%02d-%02d %02d:%02d\n",year,mon,day,hour,minute)
>
>while it would be a lot nicer to do:
>
> printf("%04d-%02d-%02d %02d:%02d\n", ParseDate.parse(datestring)

just use a * just before an array to make it a list of parameters.

Btw, maybe you could just use
print Date.strftime(yourformat)

[Fred Werne]

Hi Wybo

Wybo Dekker schrieb:

>
> Is there a way to convert an array to a (parameter-)list?

Do you mean *anArray ?

> I often find myself doing things like:
>
> year,mon,day,hour,minute = ParseDate.parse(datestring)
> printf("%04d-%02d-%02d %02d:%02d\n",year,mon,day,hour,minute)
>
> while it would be a lot nicer to do:
>
> printf("%04d-%02d-%02d %02d:%02d\n", ParseDate.parse(datestring)

I tested the following
---------------------------------------------------
dateArray = [1973,11,9,11,30]
printf("%04d-%02d-%02d %02d:%02d\n", *dateArray)
---------------------------------------------------
It works.

I don't have a class ParseDate with a method parse,
but if it returns an Array, I think

printf("%04d-%02d-%02d %02d:%02d\n", *ParseDate.parse(datestring))
^ ^

will work.

I hope, I understand your problem.

Regards

Fred from Wuppertal, Germany

[Wybo Dekker]

On Sat, 15 Nov 2003, ts wrote:

> ruby -rparsedate \
> -e 'printf("%04d-%02d-%02d %02d:%02d\n",
> *ParseDate.parsedate(Time.now.to_s))'
> 2003-11-15 13:31

Great! That's just what I was looking for;
I now could even find it in the book; thanks!

--
Wybo