Appericate your help, it worked some extended,thanks to that. May be I haven't explain too well

Some of the input are concatenating and trimmed,I would say the first file (P1) and first field will be uniqe and in the second file (S1) "_ref1 or _ref3 or _ref4" will have extension.

Input File One P1

bbb,2,3

aaa_1,4,5

ccc_1,5,6

Input file Two s1

bbb_ref1,5

aaa_1_ref3,8

ccc_1_ref2,6

Input file three S2 and S3

bbb_ref1,10

aaa_1_ref3,9

ccc_1_ref2,11

The result will be

bbb,2,3,5,10

aaa_1,4,5,8,9

ccc_1,5,6,6,11

I apologize for the confusion

In reply to Re^2: hash help by bkish11
in thread hash help by bkish11

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.