Re^2: Need help understanding code snippet with "grep -f"

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Re^3: Need help understanding code snippet with "grep -f" by afoken (Chancellor) on Dec 23, 2015 at 09:20 UTC
I figure the grep -f and the map are both not necessary. Shouldn't this work also? `my @files = glob {"archiv/vp.o$id"};` [download] No. glob does not check the type of the file. -f does: `/tmp>touch foo.txt /tmp>mkdir bar.txt /tmp>ls -lF [...] drwxr-xr-x 2 alex users 40 Dec 23 10:16 bar.txt/ -rw-r--r-- 1 alex users 0 Dec 23 10:16 foo.txt [...] /tmp>perl -E 'say for glob ".txt"' bar.txt foo.txt /tmp>perl -E 'say for grep -f,glob "*.txt"' foo.txt /tmp>` [download] Alexander -- Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)	[reply] [d/l] [select]
Re^4: Need help understanding code snippet with "grep -f" by Marshall (Canon) on Dec 23, 2015 at 09:49 UTC
Yes, this is quite correct! We are getting far from the original point. I think that instead of creating a bunch of sub-directories, a simple DB file would be just fine. An EXCEL .csv file would be fine.	[reply]
Re^3: Need help understanding code snippet with "grep -f" by GrandFather (Saint) on Dec 23, 2015 at 08:47 UTC
The map is useful if you have a list containing more than one item. As I said in my OP the grep is redundant if you are using glob. Premature optimization is the root of all job security	[reply]
Re^4: Need help understanding code snippet with "grep -f" by Marshall (Canon) on Dec 23, 2015 at 09:28 UTC
I think the OP has working code and all is fine. I don't see any reason at all to quibble. The Perl map{} especially in conjunction with Perl grep{} in the comma format can be hard to understand.	[reply]