...the index of the row and column where the data is missing...
#!/bin/perl5

use strict;
use warnings;
use Data::Dumper;
$Data::Dumper::Indent = 1;
$Data::Dumper::Sortkeys = 1;

# two passes
# first, load the db

my @db;
while (my $rec = <DATA>){
  my @flds = unpack qq{A10xA14xA7xA5xA6xA6}, $rec;
  push @db, \@flds;
}

# second, iterate over it

for my $i (0..$#db){ # each row
  my @row = @{$db[$i]};
  for my $j (0..$#{@row}){ # each field
    if (not $row[$j]){
      printf qq{row: %s col: %s is missing\n}, $i+1, $j+1;;
    }
  }
}

# a field has been removed from each of the last two records
__DATA__
maps_c7    190_520        3195927 00    40     0K8632
maps_c7    210_520        3195928 00    41     0K8701
maps_c7    210_620        3195929 00    42     0K8702
maps_c7    230_560        3195930 00    43     0K8635
maps_c7    230_620        3195931 00    44     0K8703
maps_c7    230_660        3195932 00    45     0K8704
maps_c7    250_660        3195933 00    46     0K8638
maps_c7    250_800        3195934 00    47     0K8705
maps_c7    275_800        3195935 00    48     0K8640
maps_c7    300_860        3195936 00    49     0K8706
maps_c7    300_860_ER     3195937 00    50     0K8642
maps_c7    330_860_ER     3195938 00    51     0K8643
maps_c7    350_860_ER     3195939 00    52     0K8707
maps_c7    300_860_RV     3195940 00    53     0K8645
maps_c7    330_860_RV     3195941 00    54     0K8646
maps_c7                   3195942 00    55     0K8647
maps_c7    360_925_RV             00    56     0K9048

[download]
output: 
row: 16 col: 2 is missing
row: 17 col: 3 is missing

[download]
...or corrupt...
For this you will need a set of regexes to define what the fields should contain/look like. You would then validate each field against each regex.

hth

In reply to Re^3: Reading a file as an multi dimensional array Please help by wfsp
in thread Reading a file as an multi dimensional array Please help by sas429s

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.