Try something like assigning $" the empty string instead of undef: 
>perl -wMstrict -le
"my @ra = (1,2,3,4,5);
 { $\" = ''; print qq{@ra}; }
"

[download]

You are correct about the use of undef but the local that CountZero used is necessary otherwise the change is global in scope.

$ perl -Mstrict -wle '
> my @arr = ( 1, 2, 3 );
> print qq{@arr};
> { $" = q{}; print qq{@arr} }
> print qq{@arr};'
1 2 3
123
123
$

[download]

I usually limit the scope to the print itself by using a do BLOCK.

$ perl -Mstrict -wle '
my @arr = ( 1, 2, 3 );
> print do{ local $" = q{}; qq{@arr} };'
123
$

[download]

I hope this is of interest.

Cheers,

JohnGG

In reply to Re^3: Concatenate printing a string and array by johngg
in thread Concatenate printing a string and array by spickles

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.