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ratbastid

10-13-2003 10:56 AM

Tiny mistake, BIG problem

Just in case any of you were wondering, when you're working in Perl, building a select box of shipping rates, there's a HUGE difference between this:

<code>
foreach my $key (sort {$rates->{$a} <=> $rates->{$b}} keys %$rates) {
  $option_list .= '<option value="' . $ups->servicenames($key) . $rates->{$key} . "\">$key - $rates->{$key}</option>\n";
}
</code>

And:<code>
foreach my $key (sort {$rates->{$a} <=> $rates->{$b}} keys %$rates) {
  $option_list .= '<option value="' . $ups->servicenames($key) . $rates->{$key} "\">$key - $rates->{$key}</option>\n";
}
</code>

One dot makes all the difference between "runs" and "not runs". That dot is the difference between "happy customer" and "SAD customer".

What obnoxious little spelling errors have YOU programmed recently?

Fallon

10-13-2003 03:11 PM

Lets see...I think I missed a " somewhere and I spent three hours searching a 5k line file for where the error was. That I think was my most recent

The_Dude

10-13-2003 04:11 PM

Quote:

int x = (int)(Math.Random() * 3)+1;

i was like why wasnt it workin, then i realized that "Random" shouldnt start w/ a capital letter.

case sensitive bastards.

juanvaldes

10-13-2003 04:22 PM

Quote:

Originally posted by The_Dude
case sensitive bastards.

Welcome to the wide world of programming. :D

Mephisto2

10-13-2003 04:27 PM

Programmers scare me.

I don't have a very "structured" mind that can look at things in a "logical" manner. My mind is all over the place, jumping from topic to topic, trying to understand the Big Picture etc.

Makes me a good PM, but I would be crap at programming...

Mr Mephisto

ratbastid

10-13-2003 05:35 PM

Quote:

Originally posted by The_Dude
case sensitive bastards.

Yeah. They're also real shits when it comes to spelling. Picky, picky!

Okay, so "print" isn't spelled with a "g" on the end. You knew what I MEANT!!!

seretogis

10-13-2003 07:45 PM

Oh man. You have no idea how wonderful that syntax highlighting in vim is until you try to work without it. I used to find it irritating to begin with, but now I can't work without it.

cliche

10-13-2003 11:57 PM

I still have a habit of leaving out semicolons, which always seems to throw up random entertaining errors.

Silvy

10-14-2003 12:14 AM

Debugging?
Try any program in Miranda...
It keeps throwing up errors like

Code:

type [[[[[[[[]]]]]]]] is unequal to [[[[[[[]]]]]]]

Tiny source, easy problem, but reading the error... sheesh!

Lebell

10-14-2003 01:20 AM

O vs 0.

I spent a day tearing out my hair (much thicker then) over this one.

seretogis

10-14-2003 04:12 AM

Quote:

Originally posted by Lebell
O vs 0.

I spent a day tearing out my hair (much thicker then) over this one.

Ouch! May I suggest changing fonts? :o

peacy

10-14-2003 05:07 AM

Re: Tiny mistake, BIG problem

Mine wasn't really a spelling error. But I started crying when after 2 days of debugging and no sleeping I finally found the "//FJD" remark in the code. (Just For Debug).
After removing couple of lines after the remark everything worked like a charm... :)

Quote:

Originally posted by ratbastid
<code>
foreach my $key (sort {$rates->{$a} <=> $rates->{$b}} keys %$rates) {
  $option_list .= '<option value="' . $ups->servicenames($key) . $rates->{$key} "\">$key - $rates->{$key}</option>\n";
}
</code>

A remark about the perl code:
In the "foreach" line when you use the when you use "keys" it's not necessary to write %$. The % is enough. Like this:
<code>
foreach my $key (sort {$rates->{$a} <=> $rates->{$b}} keys %rates)
</code>

ratbastid

10-14-2003 05:29 AM

Quote:

Originally posted by peacy
A remark about the perl code:
In the "foreach" line when you use the when you use "keys" it's not necessary to write %$. The % is enough. Like this:
<code>
foreach my $key (sort {$rates->{$a} <=> $rates->{$b}} keys %rates)
</code>

Not when you're working with a hashref, it's not. The hash reference $rates must be "hashified" by spelling it %$rates as an argument to the keys() function. Otherwise you're talking about the HASH %rates which, in this code snippet, is undefined.

Try running the following code:

Code:

#!/usr/bin/perl



my $hashref;

my %hash;



%hash = ( a => 1, b => 2);

$hashref = \%hash;



print "Foreaching through \%hash:\n";

foreach my $key (keys %hash) {

&nbsp;&nbsp;print "$key -> $hash{$key}\n";

}



print "\nForeaching through \$hashref:\n";

foreach $key (keys %$hashref) {

&nbsp;&nbsp;print "$key -> $hashref->{$key}\n";

}



print "\nForeaching through \$hashref treated like a hash:\n";

foreach $key (keys %hashref) {

&nbsp;&nbsp;print "$key -> $hashref->{$key}\n";

}



print "\nDone!\n";

exit(0);

This is ANOTHER thing I've learned by making stupid one-character mistakes! :D

peacy

10-14-2003 05:35 AM

Quote:

Originally posted by ratbastid
Not when you're working with a hashref, it's not. The hash reference $rates must be "hashified" by spelling it %$rates as an argument to the keys() function. Otherwise you're talking about the HASH %rates which, in this code snippet, is undefined.

Ok... From the original code I didn't realize (at first sight) that it's a ref... Should've known it...

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