Help with Compare script

Posted on 2014-09-07
Last Modified: 2014-09-10
Need a script to compare two lists
Question by:gaurav sharma
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 5
  • 3
LVL 26

Expert Comment

ID: 40309035
my @list1 = (5,3,7,2,4);
my @list2 = (3,6,8,2,1);
my %hash1 = map { $_ => 1 } @list1;
foreach my $k (@list2) {
    if (exists $hash1{$k}) {
        print "$k found in both lists\n";
        delete $hash1{$k};
    } else {
        print "$k not found in list1\n";
print map { "$_ not found in list2\n" } keys %hash1;

Open in new window


Author Comment

by:gaurav sharma
ID: 40309040
I have two text files workspace.txt and invalids.txt .Attached are both the text files. The perl script :

1. Needs to have the paths to the workspace.txt and invalids.txt as arguments like  /path/to/invalids.txt /path/to/workspace.txt  

2.  Check if each string in workspace.txt is present in invalids.txt. If a match is found in the invalids.txt then print
     the corresponding line in invalids.txt

3. The above check in invalids.txt is to look for string between the dot(.)and colon(') at the end.
      For instance in the file invalids.txt consider the line  'PACKAGE BODY: TRON2000.ts_k_jrp_300901sfsfs0_mma'      
      for comparison only consider the string


4. If a match is found then print the complete corresponding line in invalids.txt  like

     'PACKAGE BODY: TRON2000.ts_k_jrp_300901sfsfs0_mma' is invalid

      or else just print the text from workspace.txt is valid this case print

      ts_k_jrp_300901sfsfs0_mma is valid

4 . Finally while comparison ignore the last row in invalids.txt n this case the line

    2 rows

Author Comment

by:gaurav sharma
ID: 40309047
Desired output :

Since the only first string in workspace.txt matches the string in the invalids.txt the desired output should be

 'PACKAGE BODY: TRON2000.ts_k_jrp_300901sfsfs0_mma' is invalid
we_fg_hj_k_mma is valid
fd_hf_ks_kd_mma is valid
fg_cb_vn_kd_kl_mma is valid
qw_kj_lk_oi_lm_mma is valid
qw_df_vc_bh_lk_mma is valid
ts_k_jrp_3dfdssd01140_mma is valid
rtewtwert_dfsg_dafasd_mma is valid
adf_afaf_afa_afA_mma is valid
Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!


Author Comment

by:gaurav sharma
ID: 40309051
@WILCOXON: Thanks for your response. I was trying to clearly explain what I need.
LVL 26

Accepted Solution

wilcoxon earned 500 total points
ID: 40309153
Based on your description, this should do what you want:
use strict;
use warnings;
use Fatal qw(open close);
my $finv = shift or die "Usage: $0 <invalids_file> <workspace_file>\n";
my $fwrk = shift or die "Usage: $0 <invalids_file> <workspace_file>\n";
open IN, $finv or die "could not open $finv: $!";
my %chk;
while (<IN>) {
    next if m{^\d+\s+rows?\s*$};
    if (m{\.(.*)'\s*$}) {
        $chk{$1} = $_;
close IN;
open IN, $fwrk or die "could not open $fwrk: $!";
while (<IN>) {
    if (exists $chk{$_}) {
        print "$chk{$_} is invalid\n";
    } else {
        print "$_ is valid\n";
close IN;

Open in new window


Author Comment

by:gaurav sharma
ID: 40309924
The script works perfectly fine. Thank you for quick response. I had one last correction to make in the requirements. The strings in invalids.txt are all uppercase.  
Before checking if the string in workspace.txt exists in invalids.txt , convert the all the strings in workspace.txt to uppercase.

Author Comment

by:gaurav sharma
ID: 40311259
@Wilcoxon: Let me know if you need anything
LVL 26

Expert Comment

ID: 40315248
It should work to just change line 19 to:
if (exists $chk{uc($_)}) {

Open in new window


Featured Post

On Demand Webinar - Networking for the Cloud Era

This webinar discusses:
-Common barriers companies experience when moving to the cloud
-How SD-WAN changes the way we look at networks
-Best practices customers should employ moving forward with cloud migration
-What happens behind the scenes of SteelConnect’s one-click button

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Using Perl DBI to query oracle 3 53
.properties file to call function/method 9 69
Perl Write to Specific line in a file 15 123
Perl Snippet to Parse String 1 60
Many time we need to work with multiple files all together. If its windows system then we can use some GUI based editor to accomplish our task. But what if you are on putty or have only CLI(Command Line Interface) as an option to  edit your files. I…
In the distant past (last year) I hacked together a little toy that would allow a couple of Manager types to query, preview, and extract data from a number of MongoDB instances, to their tool of choice: Excel (…
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…

737 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question