Talking about bull ;-)

BTW, if you want to avoid this particular bit of magic, you can rewrite your list slice as an array slice: [get_a_list()]->[7,0]. And, as quietly noted in the documentation, if you want this behavior for an array slice, just write it as a list slice: (@array)[7,0].

I am pretty sure that slicing while dereferencing with right-arrow isn't (yet) implemented in perl! 

  DB<71> x [qw/a b c/]->[2]                # works like expected
0  'c'
  DB<72> x [qw/a b c/]->[1,0]              # oops!
0  'a'
  DB<73> x [qw/a b c/]->[0,1]
0  'b'

[download]

Seems that instead to try slicing, the comma is interpreted in scalar context. Hence the last element of the slice-list is chosen as index!

UPDATE: the only way I know to slice lists like arrays is:

  DB<83> x @{[ qw// ]}[0,1]
0  undef
1  undef
  DB<84> x @{[ qw/a b c/ ]}[0,1]
0  'a'
1  'b'

[download]

Cheers Rolf

In reply to Re^3: Array/List Strangeness (why) by LanX
in thread Array/List Strangeness by Manchego

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.