Calling a function within a variable declaration

In my lifelong quest to write my entire code on a single line, and give all the psychopathic maintainers nightmares, I ask the following question:

Is there any way I can instantiate an object, assign it to a variable, and call a function on the instantiation on the same line?

Eg I have:

var abc=new window();
window.show()

But i want something along the lines o开发者_开发百科f...

(var abc= new window).show()

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Sure. Use an anonymous function to allow you to embed statements inside your expression thus:

var abc = (function (abc) { return abc.show(), abc }(new window));

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I think the essence of qour question is: Can you use var inside an expression?

The answer is No. A var statement is, well, a statement, and not an expression. The contents of parentheses however need to be expressions.

If you're interested in the technical details, see http://ecma262-5.com/ELS5_HTML_with_CorrectionNotes.htm#AnnexA, A.3 and A.4

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Edit: You can however use

var abc;
(abc = new window()).show();

...which is pretty pointless here I guess.

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How about?

var abc=new window();abc.show();

Or in one statement

new window().show();

Or using eval()

eval("var abc=new window();abc.show();")