Trending at Instagram • Hacker News Board

Re: Trending at Instagram

#11

Post by flashman » Thu, Jul 02, 2015, 6:16 AM UTC

Differentiation between popularity and novelty? What a succinct explanation. Incidentally Twitter originally used popularity, but switched to novelty[1] because Justin Bieber regularly dominated the trending tweets list.

[1]http://mashable.com/2010/05/14/twitter-improves-trending-top...

Re: Trending at Instagram

#12

Post by anantzoid » Thu, Jul 02, 2015, 7:23 AM UTC

Surprisingly, I've applied most of the mentioned algorithms on real world data while working on some side projects. Realized that even big organizations use fundamental Machine Learning algorithms to get their tasks done. This feels quite reassuring as you don't need a MS/PhD to solve such complex/interesting problems.

Re: Trending at Instagram

#13

Post by morenoh149 » Thu, Jul 02, 2015, 9:49 AM UTC

Systemic33 wrote: post #3

Very interesting read, I wonder if Twitter does it in a similar way. Anyone who knows where to learn more about the system design they use, with the pre-processor, parser, scorer, and ranker? How do these interact? What's the respective input and output? Links to some similar system with more in-depth on this area would be appreciated.

I would imagine its all closed source.

Re: Trending at Instagram

#14

Post by JamesMcMinn » Thu, Jul 02, 2015, 12:04 PM UTC

jsuar wrote: post #5

ryanelfman wrote: post #4

I couldn't help but notice S(h, t). Never the less it was a very good article.

I agree. "Every few minutes, a line with the current value for S(h, t) is emitted." Hard to believe the author didn't notice this... Maybe just some humor for the trending classification overview?

I doubt it was done deliberately to be funny - using S for Score, h for Hashtag and t for time are about as standard as you could get.

Re: Trending at Instagram

#15

Post by jsuar » Thu, Jul 02, 2015, 1:26 PM UTC

JamesMcMinn wrote: post #14

jsuar wrote: post #5

Earlier quoted context omitted.

I agree. "Every few minutes, a line with the current value for S(h, t) is emitted." Hard to believe the author didn't notice this... Maybe just some humor for the trending classification overview?

I doubt it was done deliberately to be funny - using S for Score, h for Hashtag and t for time are about as standard as you could get.

True. I guess it's just coincidental humor for some readers.