JS Trickery

gistfile1.js

// editable web page
(function(){
	document.body.contentEditable='true';
	document.designMode='on';
})();

// merge arrays
(function(){
	var a = [1,2,3];
		b = [6,5,4];
	Array.prototype.push.apply(a, b);
})();

// randomize an array
(function(){
	[1,2,3,4,5,6,7,8,9].sort(
		function() {
			Math.random() - 0.5
		}
	);
})();

// call stack

(function(){
	try {
		throw Error();
	} catch( eR ) {
		return eR.stack;
	}
})();

// watch a member (js 1.8/Gecko)
(function(){
	var x = {
		'thing' : 'value'
	};
	if ( typeof(x.watch) == 'function' ) {
		x.watch( 'thing', function ( ev ) {
			console.log( 'watched thing', ev );
		} );
	}
})();

// regex pointers
(function(){
	('this is bar').match( /( ba)r$/ );
	RegExp.$1;
})();

// crazy img tags
(function(){
	var R=0,
		x1 = .1,
		y1 = .05,
		x2 = .25,
		y2 = .24,
		x3 = 1.6,
		y3 = .24,
		x4 = 300,
		y4 = 200,
		x5 = 300,
		y5 = 200,
		DI = document.getElementsByTagName( 'img' ),
		DIL = DI.length,
		DIS = null;
	function CHAOS () {
		for ( i=0; i-DIL; i++ ) {
			document.body.appendChild( DI[i] );
			DIS = DI[i].style;
			DIS.position = 'absolute';
			DIS.left = ( Math.sin( R * x1 + i * x2 + x3 ) *x4 + x5 ) + 'px';
			DIS.top = ( Math.cos( R * y1 + i * y2 + y3 ) * y4 + y5) + 'px';
		}
		R++;
	}
	setInterval( 'CHAOS()', 5 );
})();

// ascii to HTML decimal
(function(){
	function assHtm (){
		var cO = '',
			cT = [].splice.call( arguments, 0 ).join( '' );
		for ( cI = 0; cI < cT.length; cI++ ) {
			cO += '&#' + cT.charCodeAt( cI ) + ';';
		}
		return cO;
	}
	assHtm( 'things' );
})();