to your HTML Add class="sortable" to any table you'd like to make sortable Click on the headers to sort Thanks to many, many people for contributions and suggestions. Licenced as X11: http://www.kryogenix.org/code/browser/licence.html This basically means: do what you want with it. */ var stIsIE = /*@cc_on!@*/false; sorttable = { init: function() { // quit if this function has already been called if (arguments.callee.done) return; // flag this function so we don't do the same thing twice arguments.callee.done = true; // kill the timer if (_timer) clearInterval(_timer); if (!document.createElement || !document.getElementsByTagName) return; sorttable.DATE_RE = /^(\d\d?)[\/\.-](\d\d?)[\/\.-]((\d\d)?\d\d)$/; forEach(document.getElementsByTagName('table'), function(table) { if (table.className.search(/\bsortable\b/) != -1) { sorttable.makeSortable(table); } }); }, makeSortable: function(table) { if (table.getElementsByTagName('thead').length == 0) { // table doesn't have a tHead. Since it should have, create one and // put the first table row in it. the = document.createElement('thead'); the.appendChild(table.rows[0]); table.insertBefore(the,table.firstChild); } // Safari doesn't support table.tHead, sigh if (table.tHead == null) table.tHead = table.getElementsByTagName('thead')[0]; if (table.tHead.rows.length != 1) return; // can't cope with two header rows // Sorttable v1 put rows with a class of "sortbottom" at the bottom (as // "total" rows, for example). This is B&R, since what you're supposed // to do is put them in a tfoot. So, if there are sortbottom rows, // for backwards compatibility, move them to tfoot (creating it if needed). sortbottomrows = []; for (var i=0; i
The motion of pendulums has been studied by students of physics for centuries. As a result, this kind of motion is really well understood. So much so that it's considered to be very predictable, and there are even simple online computer simulations based upon the fairly simple math that it takes to describe the mechanical motion of a pendulum operating under a constant gravity.
But what happens when you take a simple pendulum and add a couple of others? Then set the whole thing spinning?
What you get is chaos, or rather, really unique motions that arise from the complex interactions of otherwise very simple mechanics.
But don't take our word for it. As with all things these days, there's a YouTube video to demonstrate this principle in action! Just *try* to predict which way the whole pendulum, or its individual arms, are going to move next:
Again, pendulum motion is something that people have understood pretty well for centuries. And yet, add just a couple of additional pendulums to a simple system and the motion you get is highly unpredictable.
There's a lesson here somewhere....
Labels: chaos, none really
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Closing values for previous trading day.
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