javascript_ref.htm

来自「Delphi脚本控件」· HTM 代码 · 共 246 行

HTM
246 行
字号 
<html>
<head>
<link rel=stylesheet type="text/css" href="styles.css">
</head>

<body>

<H2>
paxJavaScript Reference
</H2>
<hr>

<p>
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 <a href="demo_js1.htm">use native JavaScript objects in your paxPascal, paxBasic, and 
paxC scripts</a>. Inversely, paxScript engine allows you to <a href="demo_js2.htm">create 
instances of paxPascal, paxBasic, paxC, and host-defined 
classes in your JavaScript scripts</a>. 

<p>
Another important paxJavaScript features are support of the <a href="lisppa.htm">LISPPA technology</a>
and
<a href="demo_complex.htm">operator overloading</a>.

<H3>
Demos
</H3>

<ul>

<li>LISPPA
<ul>
<li><a href="demo_js_lists.htm">Linked lists</a>
<li><a href="demo_js_2lists.htm">Two way linked lists</a>
<li><a href="demo_js_trees.htm">Binary trees</a>
<li><a href="demo_js_polynomials.htm">Polynomials</a>
<li><a href="demo_js_euler.htm">Euler algorithm</a>
</ul>


<li>
Prototypes
</li>

<blockquote>
<pre>
x = <font color="blue"><b>new</b></font> Object
y = <font color="blue"><b>new</b></font> Object

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

x.prototype = y

<font color="blue"><b>print</b></font> x.prototype.p
<font color="blue"><b>print</b></font> x.p

x.p = 123

<font color="blue"><b>print</b></font> x.prototype.p
<font color="blue"><b>print</b></font> y.p

<font color="blue"><b>print</b></font> x.javascript_method(2, 3)
<font color="blue"><b>print</b></font> y.javascript_method(2, 3)

<font color="blue"><b>print</b></font> y.pascal_method(5)
<font color="blue"><b>print</b></font> x.pascal_method(5)

<font color="blue"><b>function</b></font> f(u, v){
  <font color="blue"><b>return</b></font> (u + v)
}
</pre>

Fact is a paxPascal-defined function:

<pre>
<font color="blue"><b>function</b></font> Fact(N: Integer): Integer;
<font color="blue"><b>begin</b></font>
  <font color="blue"><b>if</b></font> N = 1 <font color="blue"><b>then</b></font>
    result := 1
  <font color="blue"><b>else</b></font>
    result := N * Fact(N - 1);
<font color="blue"><b>end</b></font>;
</pre>
</blockquote>

<li>
Arguments Object
</li>

<blockquote>
<pre>
G(100, 3.56, 'abc');

<font color="blue"><b>function</b></font> G(x){
  <font color="blue"><b>print</b></font> x;

  <font color="blue"><b>for</b></font> (I=0; I < arguments.length; I++)
    <font color="blue"><b>print</b></font> arguments[I];
}
</pre>
</blockquote>

<li>
Object Literals
</li>

<blockquote>
<pre>
w = 'W'
x = {'abc': 100, 'pq': 200, 'xyz': 300, 50: 400, w: 500}
<font color="blue"><b>for</b></font> (I <font color="blue"><b>in</b></font> x)
  <font color="blue"><b>print</b></font> I, x[I]
</pre>
</blockquote>

<li>
Eval Function
</li>


<blockquote>
<pre>
<font color="blue"><b>print</b></font> eval('3 + 2');

x = <font color="blue"><b>new</b></font> <font color="blue"><b>Function</b></font>("x", "return x + x;");
<font color="blue"><b>print</b></font> x(3);
y = x;
<font color="blue"><b>print</b></font> y(4);

z = eval('function f(x, y, z) {return x + y + z;}');
<font color="blue"><b>print</b></font> f(1, 2, 3);
<font color="blue"><b>print</b></font> z(4, 5, 6);
</pre>
</blockquote>

<li>
Arrays
</li>

<blockquote>
<pre>
<font color="blue"><b>var</b></font> a = <font color="blue"><b>new</b></font> Array(3)
a[2] = 12;
<font color="blue"><b>print</b></font> a;
<font color="blue"><b>print</b></font> a.length;
a[5] = 36;
<font color="blue"><b>print</b></font> a;
<font color="blue"><b>print</b></font> a.length;
<font color="blue"><b>var</b></font> d = a.concat([1,2,3]);
<font color="blue"><b>print</b></font> d.length;
<font color="blue"><b>print</b></font> d;
<font color="blue"><b>var</b></font> s = d.join('-');
<font color="blue"><b>print</b></font> s;
<font color="blue"><b>print</b></font> d.pop;
<font color="blue"><b>print</b></font> d.length;
d.push(40, 50);
<font color="blue"><b>print</b></font> d;
<font color="blue"><b>print</b></font> d.length;
d.reverse();
<font color="blue"><b>print</b></font> d;
<font color="blue"><b>print</b></font> d.shift();
<font color="blue"><b>print</b></font> d;
u = d.slice(2, -1);
<font color="blue"><b>print</b></font> u;
d.sort();
<font color="blue"><b>print</b></font> d;
d.unshift('abc', 'pq');
<font color="blue"><b>print</b></font> d;
</pre>
</blockquote>

<li>
Strings and Regular Expressions
</li>

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

<li>
COM Support
</li>


<blockquote>
<pre>
WordApp = <font color="blue"><b>new</b></font> ActiveXObject("Word.Application");
WordApp.Visible = <font color="blue"><b>true</b></font>;
WordApp.Documents.Add();
<font color="blue"><b>var</b></font> Range = WordApp.Documents.Item(1).Range();
Range.Text = "This is a column from a spreadsheet: ";
<font color="blue"><b>for</b></font> (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()
</pre>
</blockquote>

<li>
Imported Delphi Classes And Script-defined Event Handlers
</li>


<blockquote>
<pre>
<font color="blue"><b>using</b></font> StdCtrls, Forms;

<font color="blue"><b>var</b></font> F = <font color="blue"><b>new</b></font> TForm(NULL);
<font color="blue"><b>var</b></font> B = <font color="blue"><b>new</b></font> TButton(F);

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

<font color="blue"><b>function</b></font> MouseHandler(Sender, Button, Shift, X, Y){
  <font color="blue"><b>print</b></font> Sender.Caption;
  <font color="blue"><b>print</b></font> Button;
  <font color="blue"><b>print</b></font> Shift;
  <font color="blue"><b>print</b></font> X;
  <font color="blue"><b>print</b></font> Y;
}
</pre>
</blockquote>



</ul>
<p>
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