Re^4: Declaring and checking content of variables with consecutive names

Thank you very much, I get your point regarding the two-dimensional array. On a related note, how would you store data to disk into consecutively named files? I would typically use a rootstring (something like $rootStr = 'dataFile' in Perl) and a counter $j, increment the counter in a loop, and print "$rootStr . $j" into a string "$fileNameString". Then I would want to name the file according to the contents of "$fileNameString". I understand, however, this is strongly discouraged in the Perl community. What approach would be better to make consecutively named files, using Perl?

Comment on Re^4: Declaring and checking content of variables with consecutive names

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Re^5: Declaring and checking content of variables with consecutive names by hippo (Archbishop) on Sep 29, 2016 at 10:01 UTC
I understand, however, this is strongly discouraged in the Perl community. If I've understood your description correctly, there should be no discouragement at all to this. I assume you mean: `my $fileroot = 'foo'; for my $j (0..999) { my $filename = $fileroot . $j; open (my $out, '>', $filename) or die "Cannot open file $filename fo +r writing: $!"; print $out "Hello world!\n"; close $out; }` [download] which seems a perfectly feasible way of achieving 1000 consecutively numbered files in one directory.	[reply] [d/l]
Re^6: Declaring and checking content of variables with consecutive names by rflesch (Novice) on Sep 29, 2016 at 10:12 UTC
Thank you again, hippo. Your code is exactly what I should have written in my reply, instead of merely describing my intentions. I used the word "discouraged" because I understood it is alway considered bad practice to put the name of a variable (i.e. the filename) into another variable.	[reply]
Re^7: Declaring and checking content of variables with consecutive names by hippo (Archbishop) on Sep 29, 2016 at 10:41 UTC
What is discouraged is using the value of one variable to be part or all of the name of another variable. See the venerable Why it's stupid to `use a variable as a variable name' by Dominus as a guide.	[reply]
Re^7: Declaring and checking content of variables with consecutive names by choroba (Cardinal) on Sep 29, 2016 at 16:37 UTC
> it is always considered bad practice to put the name of a variable (i.e. the filename) into another variable Yes, it is, but in this case, we're putting the value of a variable into another variable, which is OK and practical. ($q=q:Sq=~/;[c](.)(.)/;chr(-\|\|-\|5+lengthSq)`"S\|oS2"`map{chr \|+ord }map{substrSq`S_+\|`\|}3E\|-\|`7**2-3:)=~y+S\|`+$1,++print+eval$q,q,a, [download]	[reply] [d/l]