Dear All,

Please find the script below which although doesnt have immediate errors..is not what I was hoping it would acheive!

#perl -w
print("Importing two data files \n");


# Lets open up file A which reads data from names_ticker to FILE_A
open(FILE_A, "< Names_Ticker.txt")
        or die "Couldn't open Names_Ticker for reading: $!\n";
@fileA=<FILE_A>;
close(FILE_A);
print "@fileA \n";

# Lets open up file B which reads data from names_offer to FILE_B
open(FILE_B, "< Names_Offer.txt")
        or die "Couldn't open Names_Offer for reading: $!\n";
@fileB=<FILE_B>;
close(FILE_B);

print "@fileB \n";





#Print the lists generated with commas... sort the format out!

#sub commify_series {
#        my $sepchar = grep(/,/ => @_) ? ";" : ",";
#        (@_ == 0) ? ''                   :
#        (@_ == 1) ? $_[0]                :
#        (@_ == 2) ? join(" and ", @_)    :
#                    join("$sepchar ", @_[0..($#_-1)], "and $_[-1]");
#                    }
#
#foreach $aref(@fileB) {
#        print "This lists contains: " . commify_series(@aref) . ".\n"
+;
#
#}


print("Comparing company names between two files\n");

# Essentially we want to find elements that are in one array but not a
+nother,
# that is find elements in @fileA that arent in @fileB.
# Solution? build hash keys of @fileB to use as a lookup table. Then c
+heck each
# element in @fileA to see if it is in @fileB

%seen = () ;             # lookup table to test memebership of @fileB
@aonly = () ;            # answer

# build lookup table
foreach $item (@fileB) { $seen{$item} = 1}

# find only elements in @fileA and not in @fileB
foreach $item (@fileA) {
        unless ($seen{$item}) {
        # its not in %seen, so add to @aonly
        push(@aonly, $item);
        }
}

print "@aonly \n";



print("Saving matched company records as new file\n");
[download]

Ideally, as suggested from previous email - I am merging two records @fileA and @fileB into a single new file which is given as @aonly.

Problems I face:

1. the contents of @fileA and @fileB - I would like to convert everything into lower capitals
2. can I add a search condition to this script which would search (a) the first 4 letters of each string in the arrays (either from the start or end of line? )

Your advice will be appreciated.

regards

Edited by Chady -- cleaned up formatting

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