Do you really know JavaScript?

#1

Post by ndr » Fri, Jan 31, 2014, 9:37 PM UTC

Do you really know JavaScript?
javascript-puzzlers.herokuapp.com

Re: Do you really know JavaScript?

#2

Post by steven777400 » Fri, Jan 31, 2014, 10:14 PM UTC

This is a good way to distinguish between someone who knows JavaScript the language from someone who can apply JavaScript to perform DOM manipulation and data requests.

Not that there's anything inherently wrong with the latter.

I fall firmly in that latter camp; I do all my algorithmic work and heavy lifting in C# and just use JS to get data onto the client and display it. But it's easy for someone like to me to start believing "I know JavaScript" when in reality, it's more accurate to say "I can use JavaScript in the browser for common client/server cases". I'm currently working through "Effective JavaScript" to help improve on this.

Re: Do you really know JavaScript?

#3

Post by eonwe » Fri, Jan 31, 2014, 10:25 PM UTC

Not that I am so sure about he usefulness of this, but there is at least a double of this question:

  [typeof null, null instanceof Object]

Re: Do you really know JavaScript?

#4

Post by davexunit » Fri, Jan 31, 2014, 10:26 PM UTC

Holy fuckaroni JavaScript is a mess of a language. I did terrible on this test.

Re: Do you really know JavaScript?

#5

Post by anon_d » Fri, Jan 31, 2014, 10:27 PM UTC

eonwe wrote: post #3

Not that I am so sure about he usefulness of this, but there is at least a double of this question: [typeof null, null instanceof Object]

I got it right the second time!

Re: Do you really know JavaScript?

#6

Post by ghayes » Fri, Jan 31, 2014, 10:28 PM UTC

eonwe wrote: post #3

Not that I am so sure about he usefulness of this, but there is at least a double of this question: [typeof null, null instanceof Object]

I found these questions awkwardly posed. This could just be "what is the `typeof null`" and not be two questions in one in the form of an array.

Re: Do you really know JavaScript?

#7

Post by clavalle » Fri, Jan 31, 2014, 10:30 PM UTC

I wish there was a 'JavaScript Under the Microscope' like 'Ruby Under the Microscope' by Pat Shaughnessy.

I think I would have a much better understanding of JavaScript if I knew how a good javascript engine works.

Re: Do you really know JavaScript?

#8

Post by danabramov » Fri, Jan 31, 2014, 10:40 PM UTC

anon_d wrote: post #5

eonwe wrote: post #3

Not that I am so sure about he usefulness of this, but there is at least a double of this question: [typeof null, null instanceof Object]

I got it right the second time!

I got it wrong both times. Ouch.

Re: Do you really know JavaScript?

#9

Post by general_failure » Fri, Jan 31, 2014, 10:42 PM UTC

Wow, i thought i was really good at javascript. I tried 7 questions at random and got 6 of them wrong.

/me sad face

Re: Do you really know JavaScript?

#10

Post by sek » Fri, Jan 31, 2014, 10:45 PM UTC

It feels more like an interactive version of wtfjs.