$punc = "?!.";
ucfirst($string);
$string =~ s#([$punc][^a-z]*[a-z])#uc($1)#eg;
## or 
$string =~ s#([$punc]\s*[a-z]#uc($1)#eg;

[download]

The first meets the strict definition of the requirements, but also causes
"Who are you? 6 is my number"
to become
"Who are you? 6 Is my number"
which may or may not be desired. If not, the second one only allows whitespace to be skipped between the end of a sentence and the start of a word.

I used a-z instead of \w because otherwise perl will try to "uppercase" an underscore, which is not what we want. It's also safe to put the whole thing in a single paren, and to uppercase the whole thing, since the only part able to be uppercased is the part we *want* uppercased. I also removed the specification of what constitutes the end of a sentence outside of the regular expression, which makes it a little easier to read, and also allows easier changes in the future without accidentally breaking your regular expression.

The usual warning vis a vis use English; and \w apply, of course. :)

In reply to RE: How do i capitalise sentences? by turnstep
in thread How do i capitalise sentences? by Anonymous Monk

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.