using grep to search an array

alicatserver has asked for the wisdom of the Perl Monks concerning the following question:

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Re: using grep to search an array by toolic (Bishop) on May 23, 2011 at 20:15 UTC
Since you didn't show any input data, and you didn't elaborate on "I cant get grep to work", I can only guess at a couple of likely problems. You might need to chomp your input: `chomp(@raw_data, @fileb);` [download] You might need to use quotemeta on your regex: `$testit = quotemeta $_;` [download] Misc advice: "code" tags are nice: Writeup Formatting Tips use strict and warnings	[reply] [d/l] [select]
Re: using grep to search an array by John M. Dlugosz (Monsignor) on May 23, 2011 at 20:14 UTC
Are you looking for lines exactly the same or just prefixes? If the latter, the "\n" at the end of $testit will get in the way. In any case, you are overwriting @grepnames each time through the loop, so you will only return the matches from the last line of FILEA. Try `push @grepnames, grep...` instead. And use strict and warnings!	[reply] [d/l]
Re^2: using grep to search an array by alicatserver (Initiate) on May 23, 2011 at 20:46 UTC
Here's the data that I should have added earlier... Also, the goal is to print the matching 7 digit line. If I found 7770005 I would get the full line from fileB. (And I change the grep line to a push) push(@grepnames,grep/$testit/,@fileb); fileA: 7770005 7770012 fileB: 7770001 ABA BANKING JOURNAL.RECORD # = b12822826. OK 7770002 THE ABNF JOURNAL.RECORD # = b13671558. ok 7770003 ACADEMIC EXCHANGE QUARTERLY : AEQ.RECORD # = b14618114. ok 7770004 THE ACADEMY OF MANAGEMENT REVIEW.RECORD # = b12691070. ok 7770005 THE ACCOUNTING REVIEW.RECORD # = b13123269. ok 7770006 "ACCOUNTING, ORGANIZATIONS AND SOCIETY.RECORD " # = b15123236. ok 7770007 "ACTA CRYSTALLOGRAPHICA. SECTION A: CRYSTAL PHYSICS, DIFFRACTION, 7770008 ADAPTED PHYSICAL ACTIVITY QUARTERLY : APAQ.RECORD # = b13274272. ok 7770009 ADMINISTRATION IN SOCIAL WORK.RECORD # = b12754225. ok 7770010 ADMINISTRATIVE SCIENCE QUARTERLY.RECORD # = b13123415. 7770011 ADOLESCENCE.RECORD # = b13171288. ok 7770012 ADVANCES IN NURSING SCIENCE.RECORD # = b12795896. ok	[reply]
Re^3: using grep to search an array by John M. Dlugosz (Monsignor) on May 23, 2011 at 20:53 UTC
OK, so it is supposed to be a prefix. That means the \n at the end of $testit is getting in the way of letting it match. Use chomp inside the loop.	[reply]
Re^4: using grep to search an array by alicatserver (Initiate) on May 23, 2011 at 21:11 UTC
Re^5: using grep to search an array by alicatserver (Initiate) on Jun 06, 2011 at 21:54 UTC


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