Useless use of array element in void context

[Dr.Ruud]

Paul Lalli schreef:

Dr.Ruud:

Er. Presumably the line of quote directly above the text
that you just quoted...

Not if you believe his use of "[T]his".

 

[Michele Dondi]

if (@old_line_num_to_comp == @out_line_num_to_comp) { ... }

But apparently here is the same problem, the comma operator is working
silently over the two arrays. This is tricky and I am wondering, why

No comma operator. Something different happening there; it checks
whether @old_line_num_to_comp and @out_line_num_to_comp have the same
number of elements.

Larry Wall or somebody else from you gurus is not inventing an
operator, just to compare two arrays, one element after the other

Well surprising as it may be, it turns out that "this kinda things" is
not required that often. And in *many cases*, but by all means *not*
in all of them, a simple

if ("@old_line_num_to_comp" eq "@out_line_num_to_comp") { ... }

would do it.


Michele

 

[Michele Dondi]

Thank you Peter!

Very polite of you to thank, but please quote *some* relevant context
from the posts you reply to, and put your comments below those
portions: this is considered good practice and greately aids
communication. You'll notice that most of us do, here.

of course! Little question to you more: you suggested:

my $same = 1;
$same = $same && $old_line[$_] == $out_line[$_] for (2 .. 6);
if ($same) { ... }

I changed to:

my $same = 1;
$same = $old_line[$_] == $out_line[$_] for (2 .. 6);
if ($same) { ... }

because I did not understand the use of the second "$same" after "="
Is it really needed?

You're confused by the absence of parentheses. Ask perl:

: gin:~ [14:35:40]$ perl -MO=Deparse,-p -e '$same = $same && $old_line[$_] == $out_line[$_] for (2 .. 6)'
: ;
: ($same = ($same && ($old_line[$_] == $out_line[$_]))) foreach (2 .. 6);
: -e syntax OK

You were probably thinking along the lines of

($same = $same) && ($old_line[$_] == $out_line[$_]))


Michele

 

[Michele Dondi]

Heheh, "Affijn" is a Dutch variant of the French "enfin".

And "enfin" for us poor (Italian and most) English speaker is... "the
end"?


Michele

 

[Dr.Ruud]

Michele Dondi schreef:

And "enfin" for us poor (Italian and most) English speaker is... "the
end"?

It can mean many things, depending how (tone and melody) it is said (or
written .

at last, at the end, shortly, summarizing, oh well, still, &c &c