Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

Ask HN: What are you learning?

news.ycombinator.com

Post reply on HN
Print view View original

851–860 of 906 posts

Re: Ask HN: What are you learning?

#851

Post by koeng »

codekilla wrote: post #821
koeng wrote: post #725

Earlier quoted context omitted.

That's amazing! I've never found that site before but I'm going to read some of their papers. Thank you for linking

Maude fascinates me to no end. Currently I'm actually re-learning kdb+/q as I want to implement some things related to bioinformatics using it, but at some point I'd really like to do some things with logic/dependent types in biology. Happy to chat further grant eonias dot org

Is there any reason why Maude is cooler than Prolog? Concurrency? Also - will email you!

Re: Ask HN: What are you learning?

#852

Post by rxsel »

Not very exciting, but I’ve been learning and using vue for a new side project.

The side project itself is essentially a platform to enable post-split parents co-parent effectively.

Re: Ask HN: What are you learning?

#853

Post by gsjbjt »

febin wrote: post #618
Twisol wrote: post #275

I'm working through Aluffi's Algebra: Chapter Zero , which covers abstract algebra (groups, fields, vector spaces, etc.) with category theoretic foundations. I took undergraduate algebra several years ago, and I'm really interested in category theory from a compositionality perspective, so this is a good opportunity to brush up on both topics. Aluffi is really well-written. It assumes some degree of mathematical matu…

I am curious about category theory? Do you have any resources on where it can be applied?

David Spivak and Brendan Fong have been doing lots of work at MIT to evangelize applied category theory. See their recent books/classes:

Seven Sketches in Compositionality: An Invitation to Applied Category Theory https://arxiv.org/abs/1803.05316

Applied Category Theory mini-course: https://ocw.mit.edu/courses/mathematics/18-s097-applied-cate...

Programming with Categories mini-course (with Bartosz Milewski): http://brendanfong.com/programmingcats.html

Re: Ask HN: What are you learning?

#854

Post by gsjbjt »

fmonteiro wrote: post #185
gsjbjt wrote: post #101

Earlier quoted context omitted.

Implementing it is the fun part! You might like going through the Raft lab in MIT's distributed systems course: https://pdos.csail.mit.edu/6.824/labs/lab-raft.html + Jon Gjengset's writeup on some of the "gotcha"s: https://thesquareplanet.com/blog/students-guide-to-raft/

Nice, I didn't know that course and I noticed that I can follow along the course, the classes are recorded. Do you think it's something worth investing to someone interested in distributed systems? The only downside is that I can't have my lab exercises validated.

Yeah, it's an excellent course. That is typically the unfortunate downside of self-studying courses, but AFAIK the tests aren't that sophisticated - you can mostly test it yourself just by running the test suite over and over again, making sure that it _really_ works 100% of the time and not just 98% of the time (given the nondeterministic nature of distributed systems failures). This is basically what students would do before submitting their labs, and most people got a full score if they ran it enough times :P

Re: Ask HN: What are you learning?

#855

Post by g_langenderfer »

aerovistae wrote: post #188

Learning the bond market, figuring out the different characteristics of all the different types of bonds, what the risks are, what the potential for gain is. I trade options on equities regularly and recently a friend has been looking for help on figuring out how to handle a large amount of money they came into, so I figured brushing up on bond investing would be helpful since their risk tolerance is substantially lo…

Buy SPY and save a bunch of time

Re: Ask HN: What are you learning?

#856

Post by shitoujizu »

DeathArrow wrote: post #655
shitoujizu wrote: post #396

Earlier quoted context omitted.

sometimes feels very sad about this since one's value should be reflected by the awesome projects he has done. I think it's just laziness of the FAANG companies. If the interviewer is well prepared and keeps digging the resume, then he should know the candidate is good or not. But by leetcoding, it's simpler for them, just keep asking the repeated questions.

I think that if your hobby projects will be important for many people: i.e. you develop something with the importance npm, or Ruby on Rails, or Vue.js, FAANG companies will make you offers without asking you leetcode kind of questions.

This is not true. Not so many people can set up popular and awesome projects like npm or vue.js. These are top level programers. But for other people you can not say they are not good enough to be qualified.

Re: Ask HN: What are you learning?

#857

Post by DeathArrow »

cheese4242 wrote: post #760
DeathArrow wrote: post #655

Earlier quoted context omitted.

I think that if your hobby projects will be important for many people: i.e. you develop something with the importance npm, or Ruby on Rails, or Vue.js, FAANG companies will make you offers without asking you leetcode kind of questions.

I read that the guy who invented Homebrew still had to go through the leetcode interview at Google (which they failed) so I'm not sure if they ever waive the interview requirements?

Somehow I don't imagine Ken Thompson willing to answer leetcode questions. If anything, he should be the one doing the asking.

Re: Ask HN: What are you learning?

#858

Post by Areading314 »

throw1234651234 wrote: post #805
Areading314 wrote: post #398

Earlier quoted context omitted.

Learning to draw is something anyone can do and is incredibly rewarding. It activates a huge part of your brain (visual) that starts firing when you see all sorts of scenes, faces, patterns, colors in real life. Try the book "drawing on the right side of the brain". Another good one is the Bargue sculpture drawing course.

Yea, right, until you try to get perspective correct. If you understand this, you are a genius: https://crafts.stackexchange.com/questions/3316/how-to-measu...

Don't worry about perspective drawing. This is a much more technical subject, separate from the skill of "drawing what you see".

Re: Ask HN: What are you learning?

#859

Post by c0deb0t »

mattclase wrote: post #841
c0deb0t wrote: post #814

Earlier quoted context omitted.

I took a look at the code, and read the paper. It seems that they directly calculate the entire 2D DP array, but use SIMD to allow each cell to contain multiple values, one for each query string. My approach uses anti-diagonals instead, but it is fast for one vs one comparisons, instead of handling multiple query strings. Regardless, my goal was to learn some SIMD and Rust (first time for both), so I did not read man…

One thing to keep in mind is for SIMD memory locality is very important; a diagonal vector with a standard 2D DP grid is gonna lead to a lot of cache misses. Just something else to learn about.

Since I am storing the entire DP matrix as diagonal vectors that are flattened, I don't think there will be many cache misses. Each diagonal only depends on its previous two diagonals, and each diagonal is stored contiguously in memory.

The problem with handling diagonals is that indexing cells and comparing characters on the diagonal becomes complex. Dealing with this without many branches (less branch mispredictions) is the hard part.

Re: Ask HN: What are you learning?

#860

Post by myguysi »

dceddia wrote: post #831
myguysi wrote: post #820

Earlier quoted context omitted.

That’s awesome! I did the same a couple of years ago (took about 1 year to complete) and it’s one of the things I’m most proud of, so I hope it feels as fulfilling for you too!

Cool! Thanks! I'm most worried about the finishing part, honestly. What did you end up doing for it? I keep debating between whether to leave the wood visible (with Tru Oil or wipe-on polyurethane), or paint it (lacquer, super labor intensive, slow, expensive), or dye/stain it and use a clear finish on top of that.

I ended up filling the grain with wood filler dyed black and make it pop and then layered a few coats of trans-red from a spray can so you can still see the grain. It’s not a glassy finish but that’s what I was going for and the colour is amazing! I always wanted a red strat with a black pickguard and gold hardware so I thought why not!

I’m personally a fan of leaving the wood visible but the best thing is you can do whatever you want and it’ll be awesome because you made it.

Post reply on HN