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Using findstr to find non matching records in two text files


Using findstr to find non matching records in two text files

By : Muru
Date : November 22 2020, 01:01 AM
it fixes the issue I am a librarian and have an issue.
code :
findstr /v /x /g:NEEDLE HAYSTACK


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How to find the matching records from 2 files in unix

How to find the matching records from 2 files in unix


By : max sh
Date : March 29 2020, 07:55 AM
around this issue I have two files which contains email_ids. 1. Test1.txt 2. Test2.txt , Try:
code :
awk 'NR==FNR{A[$1]; next} $1 in A' file1 file2 > file.new
awk '           
  NR==FNR {               # When the first file is being read (only then are FNR and NR equal)
    A[$1]                 # create an (associative) element in array A with the first field as the index 
    next                  # start reading the next record (line)
  }              
  $1 in A                 # while reading the second file, if field 1 is present in array A then print the record (line) 
' file1 file2 > file.new  # first read file1 as the first file and then file2 as the second file and write the output to a 3rd file.
how to find matching records from 3 different files in unix

how to find matching records from 3 different files in unix


By : Jonjo
Date : March 29 2020, 07:55 AM
I hope this helps you . I have 3 different files. Test1.txt , Test2.txt & Test3.txt , Here is how you'd do with awk:
code :
awk '
FILENAME == ARGV[1] { a[$0]++ }
FILENAME == ARGV[2] && ($0 in a) { b[$0]++ }
FILENAME == ARGV[3] && ($0 in b)' file1 file2 file3
JJTP@yahoo.com
How to show matching and Miss matching records of two text files in command prompt using Perl?

How to show matching and Miss matching records of two text files in command prompt using Perl?


By : user3050548
Date : March 29 2020, 07:55 AM
may help you . I'm using two text files sampleA.txt and sampleB.txt. I have two fields in each file and I need to compare first record(first row) of sampleA.txt with the first row of sampleB.txt and I want to show matching records as well as miss matching records in command prompt.I need to do that in Perl. , You left out 2|X:
code :
use strict; 
use warnings; 
use 5.016;
use Data::Dumper;

#Create a set from the entries in sampleA.txt:

my $fname = 'sampleA.txt';

open my $A_INFILE, '<', $fname
    or die "Couldn't open $fname: $!";

my %a;

while (my $line = <$A_INFILE>) {
    chomp $line;
    $a{$line} = undef;
}

close $A_INFILE;
say Dumper(\%a);

#Create a set from the entries in sampleB.txt:

$fname = 'sampleB.txt';

open my $B_INFILE, '<', $fname
    or die "Couldn't open $fname: $!";

my %b;

while (my $line = <$B_INFILE>) {
    chomp $line;
    $b{$line} = undef;
}

close $B_INFILE;
say Dumper(\%b);

#Divide the entries in both files into matches and mismatches:

my (@matches, @mismatches);

for my $a_val (keys %a) {
    if (exists $b{$a_val}) {
        push @matches, $a_val;
    }
    else {
        push @mismatches, $a_val;
    }
}

for my $b_val (keys %b) {
    if (not exists $a{$b_val}) {
        push @mismatches, $b_val;
    }
}

say Dumper(\@matches);
say Dumper(\@mismatches);

--output:--
$VAR1 = {
          '5|A' => undef,
          '4|Z' => undef,
          '1|X' => undef,
          '2|A' => undef
        };

$VAR1 = {
          '2|X' => undef,
          '3|B' => undef,
          '4|C' => undef,
          '2|A' => undef
        };

$VAR1 = [
          '2|A'
        ];

$VAR1 = [
          '5|A',
          '4|Z',
          '1|X',
          '2|X',
          '3|B',
          '4|C'
        ];
How to find the non matching records between two files using awk

How to find the non matching records between two files using awk


By : sadikikinci
Date : March 29 2020, 07:55 AM
should help you out EDIT: Trying one more time to get OP's expected output by making first field as index key.
code :
awk '
BEGIN{
  FS="|"
}
NR==FNR{
  exclude[$1]
  next
}
!($1 in exclude)
' file2.txt file1.txt

awk '{gsub(/\r|[[:space:]]+$/,"")} NR==FNR {exclude[$0];next} !($0 in exclude)' file2.txt file1.txt
Windows - How to grep (or findstr) html files and showing the first matching expression

Windows - How to grep (or findstr) html files and showing the first matching expression


By : Richard Luck
Date : March 29 2020, 07:55 AM
I hope this helps you . Windows findstr returns complete lines. You can avoid this with GNU sed:
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