Re: Complex conditional statements

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Re^2: Complex conditional statements by bofh_of_oz (Hermit) on Jun 16, 2005 at 14:24 UTC
I think that's difficult to understand, even in English. Guess it's my Russian background and non-linear thinking then. ;) As for the `if !B then A else if (E and F) then (C and D)` [download] AFAIK there is no then keyword in Perl, and I wanted to use the corerct syntax (i.e. to be able to replace A, B, C etc by valid statements to get a working code) By the way, where can I find references to the syntax of those Perl keywords? I tried to search for them, but they aren't functions, and Google promptly omits them from the search criteria... -------------------------------- An idea is not responsible for the people who believe in it...	[reply] [d/l]
Re^3: Complex conditional statements by Transient (Hermit) on Jun 16, 2005 at 14:30 UTC
oh, well, then you're still missing curly braces and mandatory parens :) I was equating to English. But I really meant "spoken language" when I said English... but perhaps that is more of a characterstic of the way English is constructed? I know for me, I had to re-read your original statement a few times to fully grok the meaning. It seems more natural as two separate concepts (personally speaking). Code-wise you want something like (if A, B, C and D were variables): `if ( !$b ) { $a; } elsif ( $e and $f ) { $c and $d; }` [download] if they are statements, something similar should suffice, with perhaps more parens and/or do {} blocks. HTH	[reply] [d/l]
Re^3: Complex conditional statements by xtype (Deacon) on Jun 16, 2005 at 17:31 UTC
By the way, where can I find references to the syntax of those Perl keywords? I tried to search for them, but they aren't functions, and Google promptly omits them from the search criteria... `perldoc perlop`	[reply]
Re^4: Complex conditional statements by GrandFather (Saint) on Jun 16, 2005 at 21:37 UTC
You might like to take a look in Tutorials and in particular at Control statements and looping. Perl is Huffman encoded by design.	[reply]
Re^4: Complex conditional statements by kaif (Friar) on Jun 21, 2005 at 06:51 UTC
They're "statement modifiers". In general, for help with Perl keywords and such that aren't functions, take a look at szabgab's immensely helpful Perl index.	[reply]
Re^3: Complex conditional statements by monarch (Priest) on Jun 17, 2005 at 07:42 UTC
Replace `then` with `&&`. IE `if ( A ) { B }` is the same as `A && B`. Likewise `if ( !A ) { B }` is the same as `A \|\| B`. So to code `if !B then A else if (E and F) then (C and D)` you would say `( ! B ) ? A : ( ( E && F ) && ( C && D ) )` [download]	[reply] [d/l] [select]
Re: Complex conditional statements by hash (Scribe) on Jun 16, 2005 at 17:15 UTC
It is possible, take a look at this piece of code: `$status != $sigsegv or $ret = $counter + 4 and printf("> Done!\n$bugfi +le is vulnerable at $counter bytes!\n") and last;` [download] As you can see i have mixed "or","and", and could include some "if" statement just for example: `$status != $sigsegv or $ret = $counter + 4 and printf("> Done!\n$bugfi +le is vulnerable at $counter bytes!\n") and last if $test eq 1;` [download]	[reply] [d/l] [select]
Re^2: Complex conditional statements by wolfger (Deacon) on Jun 20, 2005 at 16:02 UTC
A unless B or (C and D) if (E and F) and I think that's difficult to understand, even in English. I would definitely recommend if !B then A else if (E and F) then (C and D) Demonstably difficult to understand, because I read it more like: `if (E && F) { unless (B \|\| (C && D)) { A } }` [download] -- Random Synapse Firing	[reply] [d/l]