Yep. came here for this. need to change conditional to 139.

Indeed, this solution is incorrect due wrong 140 len checking

Agreed, this solution would fail for the testcase suggested by @galaxyAbstractor.

I also agree this solution is not correct. The hash tag would be less then 140 in length if the str is for example 141 in length.

i think so too @galaxyAbstractor...

false if the final output length is greather than 140... better check test cases?

I think you misunderstood the instructions, but there were no test case to catch this. A 140+ char input is valid if the resulting string is 140 or less. Remember we are removing all the spaces, and adding a #.

Oh well I overthought this one >.<. At least I got to learn a bit about apply, map and every :P

The "submit" button seems to get disabled when there is a connection error (on my part), and the only way to resolve it is to reload the page.

Why didn't I think of instanceof like the other solutions >.<