Problem 1295. Bit Reversal

Given an unsigned integer x, convert it to binary with n bits, reverse the order of the bits, and convert it back to an integer.

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Last solution submitted on Sep 15, 2017

Last 200 Solutions

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Solution 207786

3 Comments

3 Comments

Christopher on 25 Feb 2013

From now on, anytime I can chain together a composition of functions, I will never exceed a Cody score of 12! Thank you!

Alfonso Nieto-Castanon on 26 Feb 2013

I also would encourage people not to submit this sort of dynamic expression regexp trick solutions indiscriminately. Having said that, and just for reference, you can push this down to a Cody score of 10... (hint1: use varargin; hint2: use 'command syntax' instead of 'function syntax').

Ned Gulley on 27 Feb 2013

To keep Cody from degenerating into a bunch of unreadable party tricks, we've blocked usage of eval, evalc, and a few others. But regexp is too important for us to block, so this trick will remain available into the foreseeable future. Which means, to back up Alfonso's comment, please don't abuse it. It's funny once, and then it just gets annoying.

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bit reversal plus15

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Problem 1295. Bit Reversal

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Problem 1295. Bit Reversal

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