paxJavaScript Reference

paxJavaScript implements ECMA 262 standard and extends it with the concept of namespace. The main subject of paxJavaScript is the cross-language integration. You can use native JavaScript objects in your paxPascal, paxBasic, and paxC scripts. Inversely, paxScript engine allows you to create instances of paxPascal, paxBasic, paxC, and host-defined classes in your JavaScript scripts.

Another important paxJavaScript features are support of the LISPPA technology and operator overloading.

Demos

• LISPPA
  • Linked lists
  • Two way linked lists
  • Binary trees
  • Polynomials
  • Euler algorithm
• Prototypes

x = new Object
y = new Object

y.p = "abc"
y.javascript_method = f
y.pascal_method = Fact

x.prototype = y

print x.prototype.p
print x.p

x.p = 123

print x.prototype.p
print y.p

print x.javascript_method(2, 3)
print y.javascript_method(2, 3)

print y.pascal_method(5)
print x.pascal_method(5)

function f(u, v){
  return (u + v)
}

Fact is a paxPascal-defined function:

function Fact(N: Integer): Integer;
begin
  if N = 1 then
    result := 1
  else
    result := N * Fact(N - 1);
end;

• Arguments Object

G(100, 3.56, 'abc');

function G(x){
  print x;

  for (I=0; I < arguments.length; I++)
    print arguments[I];
}

• Object Literals

w = 'W'
x = {'abc': 100, 'pq': 200, 'xyz': 300, 50: 400, w: 500}
for (I in x)
  print I, x[I]

• Eval Function

print eval('3 + 2');

x = new Function("x", "return x + x;");
print x(3);
y = x;
print y(4);

z = eval('function f(x, y, z) {return x + y + z;}');
print f(1, 2, 3);
print z(4, 5, 6);

• Arrays

var a = new Array(3)
a[2] = 12;
print a;
print a.length;
a[5] = 36;
print a;
print a.length;
var d = a.concat([1,2,3]);
print d.length;
print d;
var s = d.join('-');
print s;
print d.pop;
print d.length;
d.push(40, 50);
print d;
print d.length;
d.reverse();
print d;
print d.shift();
print d;
u = d.slice(2, -1);
print u;
d.sort();
print d;
d.unshift('abc', 'pq');
print d;

• Strings and Regular Expressions

var r, re;       
var s = "The rain in Spain falls mainly in the plain";
re = /ain/i;    //Create regular expression pattern.
r = s.match(re);   //Attempt match on search string.
print r;

• COM Support

WordApp = new ActiveXObject("Word.Application");
WordApp.Visible = true;
WordApp.Documents.Add();
var Range = WordApp.Documents.Item(1).Range();
Range.Text = "This is a column from a spreadsheet: ";
for (I = 0; I < 3; I++)
  WordApp.Documents.Item(1).Paragraphs.Add();
Range = WordApp.Documents.Item(1).Range(WordApp.Documents.Item(1).Paragraphs.Item(3).Range.Start);
Range.Paste()

• Imported Delphi Classes And Script-defined Event Handlers

using StdCtrls, Forms;

var F = new TForm(NULL);
var B = new TButton(F);

F.Show();
B.Parent = F;
B.OnMouseDown = MouseHandler;
B.Caption = 'Click Me';

function MouseHandler(Sender, Button, Shift, X, Y){
  print Sender.Caption;
  print Button;
  print Shift;
  print X;
  print Y;
}