The both "visit" each element of a list

I was talking about their purpose.

The only way I can think of map on its own "transforming" a list is constructs like:

The whole purpose of map is to transform a list. 

my @b = map uc, @a;                  # 1 to 1
my @b = map { $_ => uc($_) } @a;     # 1 to N, const ratio
my @b = map { /^#/ ? () : $_ } @a;   # 1 to N

[download]

But then it's the combination of map and the assign statement

No way. You don't have to assign the list to anything. You could pass it to join, for example. 

print join '|', map uc, qw( a b c );

[download]

In reply to Re^3: Map Vs Foreach by ikegami
in thread Map Vs Foreach by perlCrazy

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.