Not the most elegant, but this does the job: 
$_=join qq#\\\\#,split(/\\/,$_,-1);

[download]
As far as shedding light on your code:
The problem is that the "g" tag, by itself does not repeat replacement.

You need to put the substitution into a loop until no more substitutions are made.

The problem with that approach is that (for me) that loops infinitely, as it discovers more "\\" replacing "\".

I'm sure a wiser monk will provide the appropriate elegant hack.

Here is another approach, using substitution: 

>perl -e "my @s=qw(\\\\c\\c\\ d\\d aa bb); for my $x(@s){($y=$x)=~ s#(
+\\+)#$1$1#g;print qq{$y=$x;\n}}"
\\\\c\\c\\=\\c\c\;
d\\d=d\d;
aa=aa;
bb=bb;

[download]
Update:Struck incorrect statements, and improved second sample code.

     Syntactic sugar causes cancer of the semicolon.        --Alan Perlis

In reply to Re: escape each backslash of each array element by NetWallah
in thread escape each backslash of each array element by bplegend

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.