Re: Parse file to Hash of Hash etc.

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Re^2: Parse file to Hash of Hash etc. by merlyn (Sage) on May 18, 2005 at 19:02 UTC
Arggh. -1 vote. Please don't use eval for this! (was Re: List Values As Multidimensional Hash Keys) Those who do not study history are doomed to repeat it, it seems. -- Randal L. Schwartz, Perl hacker Be sure to read my standard disclaimer if this is a reply.	[reply]
Re^3: Parse file to Hash of Hash etc. by mrborisguy (Hermit) on May 18, 2005 at 19:23 UTC
Point taken. And a good read too. Thanks! I'll try to be more careful next time. Do you have a suggestion of the simplest way to do this safely?	[reply]
Re^4: Parse file to Hash of Hash etc. by merlyn (Sage) on May 18, 2005 at 19:25 UTC
There are various solutions in the referenced thread, as well as other places here. Super Search is your friend. -- Randal L. Schwartz, Perl hacker Be sure to read my standard disclaimer if this is a reply.	[reply]
Re^3: Parse file to Hash of Hash etc. by crusty_collins (Friar) on May 18, 2005 at 19:41 UTC
I think I understand what you are saying but the code from mrborisguy works great for me and I understand what it is doing, which for me is very important. I do not like to just cut and past code because in the end someone has to support it. I did try the data dumper but am unable to access the data on the return. ?? Probably since I don't know what I am doing :) maybe a plus one for for mrborisguy ?	[reply]
Re^4: Parse file to Hash of Hash etc. by merlyn (Sage) on May 18, 2005 at 20:14 UTC
It'll "work" until someone passes you a hash key containing a single quote, and then all hell breaks loose. Please read the articles in the thread that I reference. -- Randal L. Schwartz, Perl hacker Be sure to read my standard disclaimer if this is a reply.	[reply]
Re^5: Parse file to Hash of Hash etc. by crusty_collins (Friar) on May 18, 2005 at 20:15 UTC
Re^2: Parse file to Hash of Hash etc. by crusty_collins (Friar) on May 18, 2005 at 18:44 UTC
VERY cool One question.... What is recursive sub? I can not find it in my perl book.	[reply]
Re^3: Parse file to Hash of Hash etc. by mrborisguy (Hermit) on May 18, 2005 at 19:01 UTC
A recursive sub is when a sub calls itself in some form. The best example of this usually given is the mathematical function factorial (denoted by !). Are you familiar with it? 4! = 4321. 7! = 7654321. In general, n! = n(n-1)(n-2)...21. But you could also say that n! = n(n-1)!. so if you would make a sub called factorial, then it would be something like this: `sub factorial { my $n = shift; return $n &factorial( $n - 1 ); }` [download] but this obviously doesn't work, 'cause it will keep going and going, so you need a stopping point too. `sub factorial { my $n = shift; if ( $n == 1 ) { return 1 } return $n * &factorial( $n - 1 ); }` [download] Try searching Google for recursive functions, recursive subs, recursion, etc.	[reply] [d/l] [select]
Re^2: Parse file to Hash of Hash etc. by crusty_collins (Friar) on May 18, 2005 at 18:48 UTC
The untested code works just fine for me.	[reply]