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  You can force the type to be a JSON number by numifying it:
  
     my $x = "3"; # some variable containing a string
     $x += 0;     # numify it, ensuring it will be dumped as a number
     $x *= 1;     # same thing, the choice is yours.
  
  Note that numerical precision has the same meaning as under Perl (so
  binary to decimal conversion follows the same rules as in Perl, which
  can differ to other languages). Also, your perl interpreter might expose
  extensions to the floating point numbers of your platform, such as
  infinities or NaN's - these cannot be represented in JSON, and thus
  null is returned instead. Optionally you can configure it to stringify
  inf and nan values.
  
  =back
  
  =head2 OBJECT SERIALIZATION
  
  As JSON cannot directly represent Perl objects, you have to choose between
  a pure JSON representation (without the ability to deserialize the object
  automatically again), and a nonstandard extension to the JSON syntax,