Well, whats all this mktime/strftime stuff, why aren't you using that? Why did you turn off the free help?

Here is how I'd write it (minimize nesting loops) 

#!/usr/bin/perl --
## 
## 2014-05-29-18:05:27
## 
## perltidy -olq  -csc -csci=10 -cscl="sub : BEGIN END if " -otr -opr 
+-ce -nibc -i=4 -pt=0   "-nsak=*"
#!/usr/bin/perl --
use strict; use warnings;
use POSIX qw/ strftime /;
use Path::Tiny qw/ path /;

#~ Main( @ARGV );
Main( 'C:/TEMP/DAILY.csv', 'C:/TEMP/MONTHLY.csv' );
exit( 0 );

sub Main {
    my( $infile, $outfile ) = @_;
    if( not has_today( $outfile ) ) {
        append_today( $infile, $outfile );
        ...    ## make noise on STDOUT
    } else {
        ...    ## make noise on STDOUT
    }
} ## end sub Main

sub has_today {
    my( $infile ) = @_;
    my $today = strftime( '%Y %m %d', localtime );
    my $fh = path( $infile )->open_raw;
    ...        ## read last 8k, check for $today
}

## assumes infile will fit in memory, if it don't, write more code :)
sub append_today {
    my( $infile, $outfile ) = @_;
    path( $outfile )->append_raw( path( $infile )->slurp_raw );
}

[download]
Path::Tiny, seek, readline

In reply to Re: check to see if a file has todays data in it, if it has exit if not then add data by Anonymous Monk
in thread check to see if a file has todays data in it, if it has exit if not then add data by john.tm

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.