Hi Csonytii

I'll focus on your regular expresson /([-\d]+(\d+)*)/

In your regular expression (regex) you have used the grouping construct (...) twice. Potentially that would result in a value in $1 and $2. But because you said there is only one number in one line this is probably not what you wanted. In your regex you also have used a character group []. The character group you have created means allowing '-' and any number. Then you follow with a '+' meaning one of these characters must appear followed by zero or more of the characters from the character group. (This means also a pattern line '-2-1' is allowed). The last (\d+)* does not seem to be not necessary since it is never reached in this case. The first part of your regex /([-\d]+)/ already 'kind of' does what you want. My suggestion would be something like: /([-+]?\d+)/. This allows zero or one '-' or zero or one '+' followed by a minimum of one number followed by zero or more numbers.

In reply to Re: Why this is work? by Veltro
in thread Why this is work? by Csonytii

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.