Hi all,

When you construct a call to a function, e.g. solve_problem($problem, $parameter) is it in anyway correct or useful to consider that you are constructing the @_ list array that will be available in the function with the part in braces, just as you would write @array = ($problem, $parameter) ?

I hope that makes sense - as a bit of background, I thought of it when asked why the following two uses of sort didn't work the same way:

my $sort_func = sub { $a <=> $b };
sort $sort_func @to_be_sorted;    # Sort 1
sort ($sort_func, @to_be_sorted); # Sort 2

[download]
The first use clearly matches 'sort SUBNAME LIST', but the second one looks like plain old 'sort LIST'.

Is this analysis correct? Could thinking like this ever lead to confusion?

Thanks,
brewer

In reply to Function calls and list creation by brewer

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.