v7.60.0018 - 2008-09-20 13:27

• +++ Scripting now can do basic calculation using math operators +-*/. Fractions and parentheses are supported.
  Examples:
    ::echo 1 + 1;
    ::echo 1 - 2 - 3; // -4
    ::echo 1 - (2 - 3); // 2
    ::echo 1/3 + 1/3;
    ::echo 1 + 2 * 3;
    ::echo (1 + 2) * 3;
    ::echo 1/0; // error division by zero
    ::$a=3; $b=2; echo $a / $b; // 1.5
    ::$fraction = "1.5"; echo $fraction == 3/2; // true
    ::echo "1.2" + "2.1"; // 3.3
  Remarks:
  - Strings are converted to numbers as possible (just like in
    comparisons).
      ::$a=""; $b="2"; echo $a + $b; // = 2
      ::$a="1a"; $b="2b"; echo $a + $b; // = 3
  - The decimal separator is NOT locale specific (e.g. dot in US,
    comma in Germany) but hard-coded to dot. This way scripts are
    interchangeable between regions.
  - To define fractional numbers you have to quote them:
      ::$fraction = "1.5"; echo $fraction / 2; // 0.75 (1.5/2)
      ::$fraction = 1.5; echo $fraction / 2; // 7.5 (15/2)
  - Calculation uses 8-byte floating point numbers with the
    following ranges:
      negative: -1.79769313486232E308  to -4.94065645841247E-324
      positive:  4.94065645841247E-324 to  1.79769313486232E308
    Floating point arithmetic has its natural shortcomings so don't
    expect too much in terms of precise accuracy down to the 12th
    digit. A file manager is not a scientific calculator.
• ! Scripting: Comparison did not honour fractions. Fixed. This works now as expected:
  ::echo "10.3" > "2.2"; //true
• + Scripting got a new command.
    Name: Echo
    Action: Show simple message box.
    Syntax: echo text
    Examples:
      ::echo "hi!";
      ::echo ;
    Remarks: It's the smaller brother of msg. Added mainly for
      copy+paste compatibility with PHP code.
• ! Scripting: Nesting ternaries did not work as expected:
    ::msg (1==1)?((2==2)?"yes":"no"):"error"; //should be "yes"
  Fixed.
• ! Scripting: Nesting comparisons did not work as expected:
    ::msg (1==1) == (2==2); //should be 1 (True)
  Fixed.
• ! Scripting: Numerical comparison was invoked if any of the operands was numerical. Wrong: _both_ operands need to be numerical! Fixed.
    ::echo ("0" > "");    //true  (1)
    ::echo ("0" > "0");   //false (0) (numeric)
    ::echo ("0" > "00");  //false (0) (numeric)
    ::echo ("0" == "00"); //true  (1) (numeric)
    ::echo ("0" == "")";  //false (0)
    ::echo ("a" == "")";  //false (0)
    ::echo ("a" == "0")"; //false (0)
    ::echo (0 == "");     //false (0)
    ::$foo=0; echo ($foo == ""); //false (0)
• ! Scripting: Would ignore functions when one or more blanks were between function name and opening parenthesis. Fixed. Now you can do this:
    ::msg quote               ("pluto");
• ! Scripting: Setting variables using equal-operator would convert the variables to lower case internally. Fixed: Case is preserved now, and this works as expected:
    ::$myText = "Howdy!"; echo $myText;
• ! SC "load": In a passed list of script labels any blanks were not trimmed. Fixed.