function return value in a regexpr

[Jonas]

Dear members,

How can I use a function return value in a regexpr?

$tmp=~s/mysearch/myfunction($1)/;
sub myfunction {
return $v;
}


Thanks in advance,

Jona


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Jona
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[Gunnar Hjalmarsson]

Re: function return value in a regexpr

Jonas wrote:[color=blue]
> How can I use a function return value in a regexpr?
>
> $tmp=~s/mysearch/myfunction($1)/;
> sub myfunction {
> return $v;
> }[/color]

You can either use the /e modifier, or you can do

$tmp =~ s/mysearch/${\ myfunction($1) }/;

--
Gunnar Hjalmarsson
Email: http://www.gunnar.cc/cgi-bin/contact.pl

[nobull@mail.com]

Re: function return value in a regexpr

Gunnar Hjalmarsson <noreply@gunnar .cc> wrote in message news:<FelSc.100 519$dP1.348987@ newsc.telia.net >...[color=blue]
> Jonas wrote:[color=green]
> > How can I use a function return value in a regexpr?
> >
> > $tmp=~s/mysearch/myfunction($1)/;
> > sub myfunction {
> > return $v;
> > }[/color]
>
> You can either use the /e modifier, or you can do
>
> $tmp =~ s/mysearch/${\ myfunction($1) }/;[/color]

The "${\foo()}" interpolation construct is best avoided. It looks
like foo() should be called in a scalar context but in fact it's
called in a list context and all but the last value is discarded.
This is confusing better IMNSO to use "@{[foo()]}" which looks like
it's a list context.

[Gunnar Hjalmarsson]

Re: function return value in a regexpr

nobull@mail.com wrote:[color=blue]
> Gunnar Hjalmarsson wrote:[color=green]
>> Jonas wrote:[color=darkred]
>>> How can I use a function return value in a regexpr?
>>>
>>> $tmp=~s/mysearch/myfunction($1)/;
>>> sub myfunction {
>>> return $v;
>>> }[/color]
>>
>> You can either use the /e modifier, or you can do
>>
>> $tmp =~ s/mysearch/${\ myfunction($1) }/;[/color]
>
> The "${\foo()}" interpolation construct is best avoided. It looks
> like foo() should be called in a scalar context but in fact it's
> called in a list context and all but the last value is discarded.
> This is confusing better IMNSO to use "@{[foo()]}" which looks like
> it's a list context.[/color]

Well, the OP's example function does not return more than one element,
which made me post that example. But, sure, "@{[foo()]}" works
irrespective of how many elements that are returned.

--
Gunnar Hjalmarsson
Email: http://www.gunnar.cc/cgi-bin/contact.pl