If we wanted to match a single character, our pattern would be /a./. The control character is a '.' after the letter in question.
No! /a./ means match two characters, an 'a' followed by any other character. To match a single lower-case 'a', the pattern is simply /a/ - try it and see:
$_ = 'He lives in Liberia';
print 'with dot: ', $_ if /a./;
# No output
print 'without dot: ', $_ if /a/;
# Outputs 'without dot: He lives in Liberia'
Also, in your last paragraph, you've inverted your square brackets and slashes...
To clarify, the dot (period) is not a 'control character', as you seem to imagine, but a 'wildcard character'. To quote from perlretut
(which I highly recommend you read, and include in your list of other sources):
The period '.' matches any character but "\n"
Update2: s/perlreftut/perlretut, sorry!
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
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:
You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, 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, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.
| & || & |
| < || < |
| > || > |
| [ || [ |
| ] || ] ||