> "Lysander" == Lysander <[EMAIL PROTECTED]> writes:
Lysander> This doesn't seem to work... My webhost is running PERL 5.004_04
That's your problem. For older Perls, you can use
for (@body) { s/foo/bar/ }
>> This works:
>>
>> s/foo/bar/ for @body;
>>
>> presuming you have a re
From: "Lysander" <[EMAIL PROTECTED]>
> This doesn't seem to work... My webhost is running PERL 5.004_04
>
> s/foo/bar/ for @body;
Too old perl for this. Use
for (@body) {
s/foo/bar/;
}
instead.
Jenda
=== [EMAIL PROTECTED] == http://
MAIL PROTECTED]>; "Robert Hanson" <[EMAIL PROTECTED]>;
"Lysander" <[EMAIL PROTECTED]>
Sent: Monday, February 04, 2002 12:28 PM
Subject: Re: Using =~ with a list
[snip]
> This works:
>
> s/foo/bar/ for @body;
>
> presuming you have a reasonably modern Perl.
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hi,
use a for loop to traverse the list...
for ($i=0;$i<$#body;$i++){
$body=$body[$i];
$body =~ s/foo/bar/;
$body[$i]=$body;# 2
}
this will also change the contents of the listif u dont want
it...comment statement marked 2.
hope this solves u r query
regs,
sa
> > Eeek. A map in void context! Please don't do that.
>
> If I do not sound inane, could you please clarify the
> following:
>
> a) Why do perl gurus exhort, not to use 'grep' or 'map'
> functions under void context?
>
Do you work 80 hours a week for no pay (void context)?
Grep, map and oth
> "RArul" == RArul <[EMAIL PROTECTED]> writes:
RArul> a) Why do perl gurus exhort, not to use 'grep' or 'map'
RArul> functions under void context?
It is only an artifact of implementation that altering $_ can alter
the input list. The purpose of map or grep is to process a list to
produce
>
> Eeek. A map in void context! Please don't do that.
>
If I do not sound inane, could you please clarify the following:
a) Why do perl gurus exhort, not to use 'grep' or 'map' functions under void
context?
b) What other functions, are to be avoided in 'void' context?
Thanks,
Rex
> "Hanson," == Hanson, Robert <[EMAIL PROTECTED]> writes:
Hanson,> Ahhh, I see. So this would work as well.
Hanson,> map {s/foo/bar/} @data;
Eeek. A map in void context! Please don't do that.
Hanson,> ...But the "for" seems to be a little bit faster which makes sense.
Hanson,> Benchmark
wallclock secs (18.87 usr + 0.00 sys = 18.87 CPU) @ 52982.94/s
(n=100)
Thanks.
Rob
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Monday, February 04, 2002 1:34 PM
To: [EMAIL PROTECTED]
Subject: Re: Using =~ with a list
>>>>> "Randal
> "Randal" == Randal L Schwartz <[EMAIL PROTECTED]> writes:
> "Robert" == Robert Hanson <[EMAIL PROTECTED]> writes:
Robert> You probably want to use "map".
Robert> This should work.
Robert> @body = map { s/foo/bar/; $_ } (@body);
Randal> No. Please don't answer without testing.
Randal
--- Lysander <[EMAIL PROTECTED]> wrote:
> I need to replace all the occurances of one thing
> with another. This is simple enough, except that
> I am working with a list variable, rather than a
> scalar.
>
> @body =~ s/foo/bar/;
Do I sense someone trying to do what HTML::Template was
designed
--- Lysander <[EMAIL PROTECTED]> wrote:
> I need to replace all the occurances of one thing
> with another. This is simple enough, except that
> I am working with a list variable, rather than a
> scalar...
list != array (and you mean an array)
>
> for my $body (@body)
> {
> $body =~
> "Robert" == Robert Hanson <[EMAIL PROTECTED]> writes:
Robert> You probably want to use "map".
Robert> This should work.
Robert> @body = map { s/foo/bar/; $_ } (@body);
No. Please don't answer without testing.
That messes up @body as well, since $_ is an alias back into the
original list
You probably want to use "map".
This should work.
@body = map { s/foo/bar/; $_ } (@body);
Rob
-Original Message-
From: Lysander [mailto:[EMAIL PROTECTED]]
Sent: Monday, February 04, 2002 1:17 PM
To: [EMAIL PROTECTED]
Subject: Using =~ with a list
I need to replace all the
I need to replace all the occurances of one thing with another. This is simple
enough, except that I am working with a list variable, rather than a scalar.
@body =~ s/foo/bar/;
give an error and
for my $body (@body)
{
$body =~ s/foo/bar/;
}
appears to leave @body empty.
How does
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