Greetings monks,
The code
chop foreach qw/foo bar baz/ will die with 'Modification of a read-only value attempted'. This is good.
However, if I make my own chop function and run it on the that literal list like so, printing what's actually getting chopped:
sub mychop(\$) { chop ${shift()} }
foreach my $thing (qw/foo bar baz/) {
print "$thing -> ";
my $c = mychop $thing;
print " $thing,$c\n";
}
Instead of dying with 'read only value' as I would expect, it prints:
foo -> foo,o
bar -> bar,r
baz -> baz,z
Can anyone enlighten me as to why this is?
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: |
| & | | & |
| < | | < |
| > | | > |
| [ | | [ |
| ] | | ] |
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.