justinmeiners

20 ms·

151.
by justinmeiners 7y ago
Math is somewhat unique in that the high-school and early college version is not at all representative of the real thing. Its not "just a taste", its qualitatively different. As the other comment above mentioned, I think this has
152.
by justinmeiners 7y ago
You may be surprised that this also applies to math. High-level math values logical and linguistic skills. This is often a hard stopping point for many students who were good at high school computation like calculus.
153.
by justinmeiners 7y ago
See my example. It was very short and helped me clarify immensely what I was going to write. You're right that if I am going to add another template to a Django site, there isn't much math to think about. But anything bigger than
154.
by justinmeiners 7y ago
This article is not about formal verification. Why would mathematical thinking involve rejecting physical realities? If there is a performance constraint you are trying to optimize, account for it. > Write a program that captures network
155.
by justinmeiners 7y ago
Glad you liked it. I mentioned in another comment, I am really emphasizing modeling the problem mathematically, not really using formal programming methods like lambda calculus. Sounds like you got my idea!
156.
by justinmeiners 7y ago
Author here. I would say that modeling the computational process in math is not typically helpful (you already have a formal programming language) you should model the real-world (or at least computer world) problem you are trying to solve.
157.
by justinmeiners 7y ago
I believe this is a comment about interests of the fields akin to differences between math and physics. They still approach computation using mathematical reasoning methods. Note how they define car and cdr and how they approach problems in
158.
by justinmeiners 7y ago
Reading math is an acquired skill. Once you have it, these things aren't annoying. See my comment above. However, in this article I am not advocating that mathematical thinking is using one letter notation. I simply follow that convent
159.
by justinmeiners 7y ago
names work well in programs because the variable typically models something in the world we understand. company.name, NetworkConnection, etc. In math and in programming this isn't always the case. Often you have a variable "epislo
160.
by justinmeiners 7y ago
Can you represent Facebook's graph of friends as an interface? Do you think they also do a lot of graph theory about it?
161.
by justinmeiners 7y ago
It seems to me that languages are making it more convenient to write DSL's, or adding them for you without totally opening up the language. For example LINQ in C# lets you build an AST and evaluate it at runtime for database-like langu
162.
by justinmeiners 7y ago
> that would occur if you fork off the original node process. Right, so why wouldn't you? Node has a "fork" where you can give it a path to a script to run. Yeah it has to JIT it, but the V8 and Node part isn't duplic
163.
by justinmeiners 7y ago
> two full fat Node.js processes Do you know about copy on write?
164.
by justinmeiners 7y ago
> By choosing node you are choosing single-threaded async IO as your primitive In node is it very easy to fork processes and have them communicate. Scripting languages for serving HTML and JSON aren't the place for threads. Node now
165.
by justinmeiners 7y ago
Perhaps on PCs, but plenty of mobile and consoles use a shared memory architecture.
166.
by justinmeiners 7y ago
This definitely sucks. Why do you think people are buying this book? Is it required for a course? When there is a book I need, but don't want, I'll get by with a PDF. When its a book I want, I buy the real thing, because I enjoy h
167.
by justinmeiners 7y ago
I think I agree with a lot of your post, but do you really think something isn't worth learning just because other people are going to know it better? Will hyper-specialization make better developers? Or would developers be better if t
168.
by justinmeiners 7y ago
Just wrote an article about the same topic: https://gist.github.com/justinmeiners/f7d08f99e7e9b8b84f0183...
169.
Think in Math. Write in Code(gist.github.com)
3 points by justinmeiners 7y ago|0 comments
170.
by justinmeiners 7y ago
> Imperative programs are notoriously difficult to comprehend Which programs can most programmers read and understand?
171.
by justinmeiners 7y ago
C is a fine language which many game/graphics developer prefer over C++. More features is not always better. Here are some reasons to choose C: - longevity. The language never changes. C++ does a good job, but not as good as C. - porta
172.
by justinmeiners 7y ago
What kind of community isn't centered around some form of shared values or common interests?
173.
by justinmeiners 7y ago
Is it bad to prefer to be around people with similar backgrounds and interests? Isn't this the definition of a community?
174.
Show HN: McCulloch and Pitts Neural Net Simulator(justinmeiners.github.io)
2 points by justinmeiners 8y ago|0 comments
175.
by justinmeiners 8y ago
Thanks! I was not familiar with this technique. What do you think about the C++ table of function pointers towards the end? I imagine that would be slower with the additional level of indirection, but I haven't profiled or examined the
176.
by justinmeiners 8y ago
Author here. Definitely agree. The intent was to write the simplest possible to VM that could run real programs. VMs are obviously a deep field of research and there are plenty more projects to learn from.