Show HN: Astro-Bot – A programming question with every new tab • Hacker News Board

Re: Show HN: Astro-Bot – A programming question with every new tab

#11

Post by anandkulkarni » Tue, Oct 30, 2018, 1:38 PM UTC

I enjoyed it, but you should allow me to disable random HackerNews links. That's not the purpose of the extension.

Re: Show HN: Astro-Bot – A programming question with every new tab

#12

Post by cift » Tue, Oct 30, 2018, 2:00 PM UTC

Is there a Firefox version?

Re: Show HN: Astro-Bot – A programming question with every new tab

#13

Post by hadeon » Tue, Oct 30, 2018, 7:13 PM UTC

cift wrote: post #12

Is there a Firefox version?

It will be coming this week or next - I'll reply here when I've released it.

Re: Show HN: Astro-Bot – A programming question with every new tab

#14

Post by hadeon » Tue, Oct 30, 2018, 7:21 PM UTC

grimoire_ghost wrote: post #5

#include int main() { int array[] = { 1, 2, 3, 4, 5}; int *ptr; ptr = a; ptr++; return 0; } This won't compile, but the answer says it should be 2

Thank you, it's fixed now.

Re: Show HN: Astro-Bot – A programming question with every new tab

#15

Post by hadeon » Tue, Oct 30, 2018, 7:22 PM UTC

nightraven97 wrote: post #10

Nice! It would be cool if there was some kind of points to denote how many questions we have answered correctly.

Scores will be coming in the next few days. I'm also planning on adding an (opt-in) leaderboard so you can see how you compare to other people.

Is a leaderboard something that would appeal to you?

Re: Show HN: Astro-Bot – A programming question with every new tab

#16

Post by hadeon » Tue, Oct 30, 2018, 7:23 PM UTC

anandkulkarni wrote: post #11

I enjoyed it, but you should allow me to disable random HackerNews links. That's not the purpose of the extension.

Great suggestion - I'll add an option to disable that.

Re: Show HN: Astro-Bot – A programming question with every new tab

#17

Post by seg12 » Tue, Oct 30, 2018, 9:29 PM UTC

The following is incorrect for finding a missing number in a sequence.

  func foo( _ nums: [Int] ) -> Int {
    var sum = 0
    var _ = nums.map {sum += $0}

    return (nums.count * ((nums.count+1) / 2)) - sum
  }

The last line should be

  return ((nums.count+1) * ((nums.count+2) / 2)) - sum

The count of nums will give the incorrect answer since it's already missing a value.

Re: Show HN: Astro-Bot – A programming question with every new tab

#18

Post by hadeon » Wed, Oct 31, 2018, 1:31 AM UTC

seg12 wrote: post #17

The following is incorrect for finding a missing number in a sequence. func foo( _ nums: [Int] ) -> Int { var sum = 0 var _ = nums.map {sum += $0} return (nums.count * ((nums.count+1) / 2)) - sum } The last line should be return ((nums.count+1) * ((nums.count+2) / 2)) - sum The count of nums will give the incorrect answer since it's already missing a value.

You're absolutely right, thanks for noticing this. There was also a bug with the parentheses I hadn't caught.

Re: Show HN: Astro-Bot – A programming question with every new tab

#19

Post by ngcazz » Wed, Oct 31, 2018, 11:01 AM UTC

    $ git checkout -b feature

The answer to this is wrong -- got green on "merge two branches" rather than "create and then checkout a new branch called 'feature'".

Re: Show HN: Astro-Bot – A programming question with every new tab

#20

Post by wink » Wed, Oct 31, 2018, 5:12 PM UTC

Why would I want to be distracted while doing a task that serves a certain purpose? I must be the only one not just opening new tabs out of boredom :P