At 1:30am they seem the same to me, but I do know the difference. I will be more clear in my future attempts to get help. Nice example, but it still doesn't answer my last question. And in my original post, I specifically asked which ids are in @data2 and not in @data.
I just need a little more help in understanding how can I do lookups on any value I want instead of every value or just the first value. Please don't think I'm being scarcastic, I'm very frustrated in trying to learn about hashes and arrays. :) Smile on those who read the docs, Perl Cookbook, The Complete Reference to Perl, and even Perl DBI. Yes, I own all three and I'm trying very hard to learn this...phew. Thanks. | [reply] |
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Actually I've got a login, but sometimes I refrain because monks will get annoyed at how many times I post a question...lol. Anyway, please tell me where you get lost in my post so I can get better at writing these situations.
Now, let me explain in detail what's happening.
@data is read from a file containg many rows such as:
1,comp1,type1
2,comp2,type2
3,comp3,type3
@data2 is read from a file containing many rows such as:
1,comp1,type1,doc1,ref1
2,comp2,type2,doc2,ref2
3,comp3,type3,doc3,ref3
4,comp4,type4,doc4,ref4
5,comp5,type5,doc5,ref5
Using this code:
{
my %data;
undef @data{@data};
foreach ( @data2 ) {
print "This $_ was not found.\n"
if not exists $data{$_}
}
}
it matches all five values from each line in @data2 to all 3 values in @data line by line. So basically every line in @data2 gets printed when that script is run. What I want to do is match the first value from @data2 to the first value from @data and return the results based on values in @data2 that are not in @data.
I also want to know how I can match the second value from @data2 to the first value in @data and return the results that are not in @data.
I hope this makes better senses. I'll keep trying if it doesn't. Thanks for all your help.
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