mhartl

106 ms·

481.
by mhartl 13y ago
Many of the examples in The Pi Manifesto are wrong. See the rebuttal I posted last year: http://tauday.com/tau-manifesto#sec-the_pi_manifesto_a_rebut... Indeed, the author of The Pi Manifesto essentially rebutted his ow
482.
by mhartl 13y ago
σ has potential, but there's a pretty bad conflict with standard deviation. The circle constant shows up an awful lot in statistics. Who cares about tau sounding like a "t" for "turn" Pi comes from perimeter, phi
483.
by mhartl 13y ago
I find it so odd when people say "bad for democracy" when they just mean "bad".
484.
by mhartl 13y ago
I really like using tau as a time constant, too, and I'm sorry to lose it when there are pi's in the picture. It's tough picking good notation, though, and unfortunately no choice is conflict-free. Before writing The Tau Man
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The State of the Tau(tauday.com)
108 points by mhartl 13y ago|52 comments
486.
by mhartl 13y ago
The Rails Tutorial is a step-by-step approach to learning web development with Rails, which covers selective features of the framework as needed, whereas The Rails Way is a comprehensive reference covering the entire framework. Between
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by mhartl 13y ago
On a previous thread, [I mentioned]( https://news.ycombinator.com/item?id=5942320 ) that at some point I'm thinking about writing Learn Enough Rails To Be Dangerous to go along with the Ruby on Rails Tutorial —but it
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by mhartl 13y ago
I might add it in the full 3rd edition. The problem is that rvm and rbenv can't coexist on the same machine, so the barrier to using both is high. In particular, it means that I haven't been able to test rbenv myself, so I don&#x2
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by mhartl 13y ago
I have tentative plans at some point to make a product called something like Learn Enough Rails To Be Dangerous to fill this niche. The plan would be to cover just the basics of Rails, while largely omitting TDD. Leaving out TDD would def
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by mhartl 13y ago
No, he's referring to POODR, which is "new" in the sense that it's been released recently compared to books like The Rails Way and the Ruby on Rails Tutorial .
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by mhartl 13y ago
You're welcome!
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The Ruby on Rails Tutorial for Rails 4.0 final(news.railstutorial.org)
172 points by mhartl 13y ago|29 comments
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by mhartl 13y ago
I just pushed the update.
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by mhartl 13y ago
I updated the book for RC2 the day it came out (announced on Twitter at https://twitter.com/railstutorial/status/344981158825689088; it just didn't merit a post on the news feed), and I've just updated i
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by mhartl 13y ago
N.B. If you click on "Share" at YouTube, it includes a box and a field with the time in the current video. If you check the box, it gives you a direct link to that time. (The format is just http://youtu.be/7FnXgpr
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by mhartl 13y ago
It is remarkable how someone can be so obviously brilliant and yet at the same time so (metaphorically) tone-deaf.
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by mhartl 13y ago
The Onion has your back: "Nation Demands New Photograph Of Edward Snowden" http://www.youtube.com/watch?v=k5H_b3mVz8s
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by mhartl 13y ago
*its government
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by mhartl 13y ago
*its name
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by mhartl 13y ago
*its own right
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by mhartl 13y ago
The point is that DDG doesn't log the information—even in the face of a court order, they have nothing to hand over.
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by mhartl 13y ago
*its
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by mhartl 13y ago
Of course there must be many, but the parent comment drew particular attention to this possibility. Using the Economist house style offers an elegant alternative, wherein virtually all people and organizations are identified explicitly, n
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by mhartl 13y ago
My point was that everyone around San Francisco calls it "the City" (even those in more populous San José), so they would have done well to add it to their set. In contrast, people around, say, Los Angeles don't typically call it "the City"
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by mhartl 13y ago
If you look at the concentration of blue in the Bay Area, you can see that they need to add a city to "What is 'the City'?": http://www.businessinsider.com/22-maps-that-show-the-deepest... Hint : It's not San José.
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by mhartl 13y ago
I've increasingly found myself using both GitHub and Bitbucket. In this vein, I just pushed up some changes to my list of Git utilities ( https://github.com/mhartl/git-utils ) that includes full pull request support for both GitHub and Bitb
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by mhartl 13y ago
Sam's use of "animal" in #20 is presumably based on the usage in Paul Graham's essay "How to Start a Startup" ( http://www.paulgraham.com/start.html , 2005): One of the best tricks I learned during our startup was a rule for deciding who t
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by mhartl 13y ago
Does this use an academic meaning of the term "language" I don't know about? It sounds like prairie dogs effectively have words , but there's no indication that they use grammar, syntax, etc., so describing their vocalizations as "language
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by mhartl 13y ago
Send me an email (address in profile) and I'll be happy to send you an essay that explores these ideas in more detail.
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by mhartl 13y ago
Using the Lieber Code ( http://www.civilwarhome.com/liebercode.htm ), the victorious Union effectively suppressed armed resistance in the old Confederacy—including a former army of highly trained, experienced, and motivated soldiers. The 3r

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