Beefy Boxes and Bandwidth Generously Provided by pair Networks
We don't bite newbies here... much
 
PerlMonks  

comment on

( [id://3333]=superdoc: print w/replies, xml ) Need Help??
I read through the suggestions below and they are great ones!

To summarize:
a)everything in Perl is a string until used in a numeric context.
b)Never, ever compare float values for equality in any languag!
c)If you compare $num1 < $num2 and both $num1 and $num2 can be converted to a number, then is is fine! If that is not true, then that's a problem.

I present here one of my subs that can compare text or numbers. This is not "perfect" and there are problems with say the "-" sign, but is a general idea.

sub alpha_num_cmp { my($a, $b) = @_; if (( $a =~ m/\D/) || ($b =~ m/\D/)) { #look for a non-digit return ($a cmp $b); #if so, then use string compare } return ($a <=> $b); #otherwise straight numeric comparison }

In reply to Re: Is a integer or string. by Marshall
in thread Is a integer or string. by rahulgupta70

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or How to display code and escape characters are good places to start.
Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Chatterbox?
and the web crawler heard nothing...

How do I use this?Last hourOther CB clients
Other Users?
Others about the Monastery: (5)
As of 2024-03-29 13:38 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found