That's possible - but has built-in problems. 

for (@list){
    ### This will not match 'String' at the end of the line
    print if /String\s/;
}

[download]

Unless you have a really unusual requirement, the typical thing to do in these cases is to look for the string followed by (or, even more commonly, surrounded by) a boundary or boundaries. Note that these are zero-width assertions - unlike whitespace which actually requires a character: 

for (@list){
    print if /String\b/;
}

[download]

This will match your string even if it's at the end of the line.

In reply to Re^3: search for exact string by oko1
in thread search for exact string by gfarhat

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.