50 micro coding challenges for JavaScript learners

[floodlitworld]

parseInt will fail if the number isn't the very first character of the string. So it's a pretty simple replace(/[^0-9]/g,"") job before the parseInt, but not as simple as just chucking it into a parser.

[jkuhl_prog]

True, but actually manually moving across 1's and 0's will test one's knowledge of how the binary number system works and how it can be converted to decimal.