cvs commit: perlfaq perlfaq4.pod

cvsuser     03/09/19 23:37:43

  Modified:    .        perlfaq4.pod
  Log:
  From: Iain Truskett <[email protected]>
  To: [email protected]
  Subject: [PATCH perlfaq4] 'is a number?' updated
  Date: Sun, 14 Sep 2003 00:13:29 +1000
  
  [1  <text/plain; us-ascii (7bit)>]
  Update to reflect the inclusion of Scalar::Util into core.
  
  Style note: I note the FAQ takes the correct approach and
  calls it 'the CPAN'. Contemporary usage has it as just
  'CPAN'. I assume 'correct' is favoured over 'popular'?
  
  Revision  Changes    Path
  1.49      +12 -8     perlfaq/perlfaq4.pod
  
  Index: perlfaq4.pod
  ===================================================================
  RCS file: /cvs/public/perlfaq/perlfaq4.pod,v
  retrieving revision 1.48
  retrieving revision 1.49
  diff -u -w -r1.48 -r1.49
  --- perlfaq4.pod	20 Sep 2003 06:33:25 -0000	1.48
  +++ perlfaq4.pod	20 Sep 2003 06:37:43 -0000	1.49
  @@ -1,6 +1,6 @@
   =head1 NAME
   
  -perlfaq4 - Data Manipulation ($Revision: 1.48 $, $Date: 2003/09/20 06:33:25 $)
  +perlfaq4 - Data Manipulation ($Revision: 1.49 $, $Date: 2003/09/20 06:37:43 $)
   
   =head1 DESCRIPTION
   
  @@ -2008,13 +2008,17 @@
      if (/^([+-]?)(?=\d|\.\d)\d*(\.\d*)?([Ee]([+-]?\d+))?$/)
   			{ print "a C float\n" }
   
  -You can also use the L<Data::Types|Data::Types> module on
  -the CPAN, which exports functions that validate data types
  -using these and other regular expressions, or you can use
  -the C<Regexp::Common> module from CPAN which has regular
  -expressions to match various types of numbers.
  +There are also some commonly used modules for the task.
  +L<Scalar::Util> (distributed with 5.8) provides access to perl's
  +internal function C<looks_like_number> for determining
  +whether a variable looks like a number.  L<Data::Types>
  +exports functions that validate data types using both the
  +above and other regular expressions. Thirdly, there is
  +C<Regexp::Common> which has regular expressions to match
  +various types of numbers. Those three modules are available
  +from the CPAN.
   
  -If you're on a POSIX system, Perl's supports the C<POSIX::strtod>
  +If you're on a POSIX system, Perl supports the C<POSIX::strtod>
   function.  Its semantics are somewhat cumbersome, so here's a C<getnum>
   wrapper function for more convenient access.  This function takes
   a string and returns the number it found, or C<undef> for input that
  @@ -2037,7 +2041,7 @@
   
       sub is_numeric { defined getnum($_[0]) }
   
  -Or you could check out the L<String::Scanf|String::Scanf> module on the CPAN
  +Or you could check out the L<String::Scanf> module on the CPAN
   instead. The POSIX module (part of the standard Perl distribution) provides
   the C<strtod> and C<strtol> for converting strings to double and longs,
   respectively.