frazzmata wrote:
I am writing a program where I want to be able to locate information
regarding a person in one file, if they appear in another.
For instance:
I have a file that just has student IDs (for students that are new)
It has a long list of Student IDs like this:
100955
104024
564765
123456
765437
123321
323999
444555
Then there is another file that has information such as this:
100955 BLow-Gomez, Joseph M MEX.AMER. QHUTC012
101121 NOBODY, GARY E. M CAUC COCO0502
101985 sOMEBODY, RICHARD M CAUC COCO0404
102989 GUY, JON G. M BLACK COCO0505
103257 DUDE, MICHAEL D. M CAUC TENN3306
104024 CHICK, JENNY A. M BLACK QHUTJ005
104272 GIRL, JOSIE R. M MEX.AMER. TENN3201
104586 BOY, TERRELL L. M BLACK QHUTG013
104802 SOMEFELLA, JAMES D. M BLACK QHUTA001
105011 PERSON, JAMES J. M CAUC COCO1909
106455 HUMAN, STEPHEN J. M CAUC YUMAD012
106461 HOMOSAPIEN, RODNEY M BLACK QHUTB014
106953 ERECTUS, JAVIER M MEX.NAT. COCO0701
107461 THIRTYTWOTEETH, TIMOTHY M CAUC TENS0904
108594 TACOBELL, ARNOLD G. M MEX.AMER. TENN2303
(all tab delimited)
For each id in the first file, I want to match it in the second file
and then print all the info contained in the second file into a third
file that contains only the people that were in both.
my %ids;
while ( <STUDENT_IDS> ) {
chomp;
next unless /^\d{6}$/;
$ids{ $_ }++;
}
while ( <SECOND_FILE> ) {
my ( $id ) = split /\t/;
next unless exists $ids{ $id };
print THIRD_FILE;
}
This is essentially what I have so far…
This only gets me up to a certain point. It doesn’t do the
comparison.
$ifile = "roster.txt";
$ofile = "output.txt";
my $ifile = "roster.txt";
my $ofile = "output.txt";
open(IFILE, "$ifile");
open(OFILE, "+>$ofile");
You should *always* verify that the file opened correctly:
open IFILE, '<', $ifile or die "Cannot open '$ifile' $!";
open OFILE, '>', $ofile or die "Cannot open '$ofile' $!";
[ *snip* ]
John
--
Perl isn't a toolbox, but a small machine shop where you
can special-order certain sorts of tools at low cost and
in short order. -- Larry Wall
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