Ralph Holzmann » Random http://ralphholzmann.com Web Development - jQuery, PHP, MySQL. In that order. Fri, 29 Jan 2010 14:01:14 +0000 en hourly 1 http://wordpress.org/?v=3.0 One Line Random Boolean in JavaScript http://ralphholzmann.com/2009/12/28/one-line-random-boolean-in-javascript/ http://ralphholzmann.com/2009/12/28/one-line-random-boolean-in-javascript/#comments Mon, 28 Dec 2009 20:24:49 +0000 Ralph http://ralphholzmann.com/?p=38 Continue reading →]]> Happy Holidays everyone! I hope everyone enjoyed the holidays this year. I’m back to work today. I just wanted to post a quick snippet that I used in a jQuery plugin I’m developing. It’s nothing earth shattering, but I thought it was worth mentioning. It’s a true random boolean in JavaScript:

!Math.round(Math.random());

This creates a random number between zero and (almost) 1, then rounds it either up or down, then uses the negation operator twice once to convert it to a true boolean (if you pass it to the typeof function, it will return “boolean”).

Now back to work!

Edit: Josh Dean pointed out in the comments that only a single negation operator is needed in this case.

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