Re^2: How can i debug compound map/grep statements just using print?

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Re^3: How can i debug compound map/grep statements just using print? by Kenosis (Priest) on Dec 01, 2012 at 21:39 UTC
You have the following: `=item B<-a, --amount> Search for files older than <amount> days, mandatory.` [download] In two days, there are 2 * 24 * 60 * 60 or 172800 seconds, thus it seemed that the following was needed: `$amount = $amount * 24 * 60 * 60;` [download] since one day equals 24 * 60 * 60 or 86400 seconds. Additionally, the following worked when I ran it using the above formula for `$amount`: `$result = grep { /.+\.$suffix$/ and $time - ( $_->stat )[9] >= $amount } io($dir)->all;` [download] An equivalent search can be done using File::Find::Rule: `$result = File::Find::Rule->file() ->maxdepth(1) ->name(qr/.+\.$suffix$/i) ->mtime(">= $amount") ->in($dir);` [download] And the following, too, but `grep`ping on days old instead of using `mtime`: `$result = grep { -M >= $amount / 86400 } # Convert back to days File::Find::Rule->file() ->maxdepth(1) ->name(qr/.+\.$suffix$/i) ->in($dir);` [download] All three methods produced the same result, even when an equivalent constant was used for the days in the last `grep`. After adjusting the `$amount` formula, your original code produced the same result, too: `$result = grep { $_ == 1 } map { $time - $_ >= $amount } map { ( $_->stat )[9] } # e.g i'm interested in this... grep { $_->name =~ /.+\.$suffix$/ } # ...and this io($dir)->all;` [download] Thus, all four code snippets produced identical results.	[reply] [d/l] [select]
Re^4: How can i debug compound map/grep statements just using print? by karlgoethebier (Abbot) on Dec 01, 2012 at 23:22 UTC
Sorry about that awkward typo: should have been hours... ŤThe Crux of the Biscuit is the Apostropheť	[reply]
Re^5: How can i debug compound map/grep statements just using print? by Kenosis (Priest) on Dec 01, 2012 at 23:59 UTC
Ah, yes--that makes sense! Used the hours calculation for all four snippets: `$amount = $amount * 60 * 60;` [download] and got identical results, until 79 hours was used (a result difference of 2), but I suspect the division in the `grep { -M >= $amount / 86400 }` yields a different precision. Interestingly, `IO::All` didn't see the file "song自然之歌," but `File::Find::Rule` did (and should have).	[reply] [d/l] [select]
Re^6: How can i debug compound map/grep statements just using print? by karlgoethebier (Abbot) on Dec 02, 2012 at 00:20 UTC
Re^7: How can i debug compound map/grep statements just using print? by Kenosis (Priest) on Dec 02, 2012 at 01:56 UTC
Re^4: How can i debug compound map/grep statements just using print? by karlgoethebier (Abbot) on Dec 02, 2012 at 00:03 UTC
"An equivalent search can be done using File::Find::Rule" This is simply true, but what i wanted to do was this: Not using File::Find Not using File::Find::Rule" Not using `qx(find...[options])` Bothering myself with map/grep Thank you very much for your advice and the insights you gave to me. Regards, Karl ŤThe Crux of the Biscuit is the Apostropheť	[reply] [d/l]
Re^5: How can i debug compound map/grep statements just using print? by Kenosis (Priest) on Dec 02, 2012 at 01:55 UTC
I really should have said that I wasn't suggesting a different or better way by using File::Find::Rule. Only used it to verify your results (like inter-rater reliability). Yours was a good map/grep piece. Nice update, by the way...	[reply]