You Can't JavaScript Under Pressure

Thanks for immediately playing audio without asking me first. I know everybody just loves it when web pages do that.

Oh! Hello. This is my thing I made for usvsth3m.com. Hope y'all like it. HTML5 Webworkers made it possible - sandboxing user-submitted JavaScript so an accidental while(1) or document.write can't kill everything.

Do have a look at the source code. Oh, and try turning up your speakers and typing in the Konami code...

Fun distraction. For me it was:

30% figuring out the answer, 20% not having my editor shortcuts available, 50% figuring out how to check if a value is a certain type.

Am I the only one that gives their functions preconditions that the input is good? To me, throwing up when you're passed a non-number to a sum method is correct behavior.

Could there be a histogram at the end that shows distribution of finishing times? Or at least a leaderboard... I did pretty well [obviously ;)] but I'd like to see where my time falls in relationship to others.

I've confirmed that I can, in fact, code under pressure, but to what degree?

Other than that, fantastically fun game. My only regret is that it's a one-time game by nature, since obviously the second time around you'd simply be remembering what you did the first time instead of creating it.

The sudden music/talking that started was annoying and caused me to close the tab immediately.

I took almost 40 minutes, am I in the wrong profession? I figured out how to do all of them right away but I got stuck on figuring out JS syntax in a few places since I barely ever use it and felt like googling was cheating. I did use google on the last one to see how to check if something's an array. I even ended up checking at one point if something's a number by (!isNaN(n/4) && n+n == 2*n), and checked for being a string or not with if(s.length!=undefined) (I know that returns true for an array as well). Would've been a lot easier with something like Intellisense - coding without it feels almost like I'm blind, after being used to it. That and I thought alert() didn't work until I noticed at the end it actually sent it to the output.

Fun little puzzles. First 4 went pretty quickly (~8:00) and then the last one took ~7 minutes Googling around for this so I could test if a variable was an integer...

  n===+n && n===(n|0)

Edit: Read the initial requirements of the puzzle, it says sum all the integers, not all the numbers. People using (typeof i[x] == 'number') just got lucky because the test-cases didn't exercise the full requirements of the puzzle ;)

  // i will be an array, containing integers and/or arrays like itself.
  // Sum all the integers you find, anywhere in the nest of arrays.

That was fun! I just got in to work so I was properly sleeping. I also rarely use typeof, so I had to look up that 'integer' and 'array' do not exist :) Also, what was really annoying is the use of 'i' for the argument. That's what I exclusively use for the 'for loop' index! Tripped me up a lot, I had to consciously remind myself every time I accessed the array. Last 'also', the font is WAY too big for my small screen, the comment never fit in, I had to scroll... So I think I did bad, 12 minutes. But still fun :)

It was a kinda cool thing, although I got some strange behavior when I was using `match` for determining whether the input is a filename - my regex was /.\../ (and so I did var match = i.match(/.\../) ), and match[1] was undefined - turned out match[2] was what I wanted, and it was present, but the behavior was incorrect in the reporting console in the game.

I finished this in 4 minutes.

Edit: looks like HN doesn't like asterisks

Lighten up, everyone, this is a fun little thing. Thanks for sharing.

I'm a bit disappointed that it doesn't award points for my heavy use of regex and obscure variable names.

there's a truly dubious test case in the File Extension test.

file called .htaccess is not filename "" and extension "htaccess" with a "." separating the two. .htaccess is a unix style dotfile. its whole name is ".htaccess" and it has no file extension.

It's problems like 5 that make me sad that IE <9 doesn't have Array.prototype.reduce.

    return i.reduce(function(prev, next) {
        if (typeof(next) == "object" && next.length) { return arraySum(next) + prev; }
        if (typeof(next) == "number") { return next + prev; }
        return prev;
    }, 0);

The input argument name "i" is really annoying. I always use "i" as for-loop var. Made some mistake on this. But the Game is really great. :D

I got 11 minutes and 14 seconds. Is that slow? The answer to my last solution was like this:

      function arraySum(i) {
	var total = 0
	for(var x=0; x < i.length; x++) {
		if(typeof i[x] == 'object') {
			 arraySum(i[x])
		} else if(typeof i[x] == 'number') {
			total += i[x]
		}
	}
	return total
     }

Total bait and switch. As soon as I saw that random array in my array of strings I knew what kind of game this would be.

Last one reminded me how awful JS is once again. There are 5 different ways to check if an object is an array, some are implementation dependent, and the obvious one doesn't work (typeof x == "array").

I created a CoffeeScript version of it. http://shovon.github.io/youcantcoffeescriptunderpressure/

"6 minutes, 21 seconds for all 5 levels. Well done!" I feel like I should have done better considering JS is one of my primary languages.

9:10, had to Google a bit for type checking, and I had forgotten the proper syntax for a string split. :-/

I got 3 minutes 39 seconds.

I used i.forEach for questions involving arrays, instead of for-loops. Saves me time.

This was awesome. 5:48. I actually turned my sound on for the end.

nice stuff but this is plain wrong! // return the file extension (with no period) if it has one, otherwise false

its like returning error codes in C for errors

What's everyone's times? I did 7 minutes

Would be great to see some solutions.