joshhart

17 ms·

121.
by joshhart 15y ago
For those of you who may not be familiar with them, using http://fastutil.dsi.unimi.it/ collections instead of Java collections is essentially the work-around for most things you'll use. Fastutil has custom classes that remove the pointer
122.
by joshhart 15y ago
I'm reading the Intelligent Investor. Graham is extremely conservative and demands, among other things, a 20 year history of dividends and a low P/E. I don't think he'd touch internet stock in general because it's here today and gone tomorr
123.
by joshhart 15y ago
Where does that page claim perfect ACID semantics? It's meant to describe what Sensei gives you for each aspect of ACID. Sensei needs an event stream to process. We've open-sourced and apache-fied Kafka which is a great candidate for an eve
124.
by joshhart 15y ago
This is exactly how it works. Queries based on some kind of id will always hit the same server, except when the server goes down. Sensei expects a semi-durable "data stream" for writes, which is very different from how most other databases
125.
by joshhart 15y ago
Yes. It's a partitioned system - you just need to have enough replicas per partition. Clients track cluster state by registering listeners to zookeeper.
126.
by joshhart 15y ago
Thanks! I'll make sure that gets corrected.
127.
by joshhart 15y ago
The facets let you support counting and group by - is there something else you had in mind? Edit: You can get a pretty quick idea of what's supported the query language at http://senseidb.github.com/sensei/bql.html . Since Sensei was desig
128.
by joshhart 15y ago
Looks like someone non-LinkedIn posted this so the rest of the team is unlikely to be around for a few more hours. Let me know if you have any questions! I worked mostly on the distribution & rpc piece.
129.
K-means computer vision demo in your browser(hartmanster.com)
1 points by joshhart 15y ago|0 comments
130.
by joshhart 15y ago
Please don't do that. I don't want to go work for some Scala shop or team in the future and find out that I'm limited to L1-only features because of management practice.
131.
by joshhart 15y ago
But you can get physical hardware on EC2 if you pay for the big instances...
132.
by joshhart 15y ago
I work at LinkedIn, so I think I'm reasonably qualified to provide my opinion. I'm certain that this won't work well. Charging $5 per profile view ($50 per 10) is simply outrageous. Most profiles will be junk or irrelevant - recruiters work
133.
by joshhart 15y ago
Yep. I'm one of the locked up employees at LinkedIn and I can't buy options (puts or calls) as part of my agreement. So there's no way to hedge. I should note though that the executives and venture capitalists are ALSO locked out, which is
134.
by joshhart 15y ago
Boosting, which he mentioned, is an ensemble method so I assume the parent is familiar with them. Ensemble methods incorporate multiple weak classifiers and work to make them stronger. I think the parent was thinking of the reverse of this,
135.
by joshhart 15y ago
I don't understand how it would be safe at all for the recipient. If the "smell prevention" failed couldn't the police just arrest whomever it was shipped to? I can understand that the shipper is pretty safe dropping the package off but if
136.
by joshhart 15y ago
In a modern datacenter, network is significantly faster than disk. See Jeff Dean's numbers everyone should know. http://www.google.com/imgres?q=google+numbers+everyone+shoul... Databases are slow for many reasons. The most common is that
137.
by joshhart 15y ago
I agree. It's a nice site and a lovely visualization, but it's not the right way to solve the problem. A PID controller or something similar like a Kalman filter is the way to go. The Anybots robots are a great example of a PID filter in ac
138.
by joshhart 15y ago
Check out scalagwt. They've enhanced GWT to read a protobuf abstract syntax tree so that any language could be compiled to javascript if it can target that output. The first language they have working is Scala, which is far more suited to w
139.
by joshhart 15y ago
$136M is a lot of money for a distributed file system. Can anyone compare GlusterFS to HDFS? I think they're booth GoogleFS clones but I'm not sure on the details except that HDFS uses a name node and is written in Java.
140.
by joshhart 15y ago
I can tell you what the problem is: overzealous postmortems. The head of engineering wants to be able to say what went wrong and how to fix it next time. That's probably fine, if the solution is better automation and failure detection. But
141.
by joshhart 15y ago
I'd like to be able to read outside or on the bus next to a window comfortably. I don't really want an iPad since I'd rather have a device optimized for reading documents than watching youtube. As for Kindle DX vs regular Kindle - I don't h
142.
by joshhart 15y ago
Darn, the Kindle DX is still $379. Everything else got a nice price drop. I've been waiting for a hardware/software update to the Kindle DX and a possible price drop for quite a while now, but I'm not sure I'll ever get it at this point.
143.
by joshhart 15y ago
It can be quadratic. Think about drawing all possible lines between points (possible components in software): Make a table with columns being # points and the # lines you can draw between them. 1 0 2 1 3 3 (triangle) 4 6 (box with a criss c
144.
by joshhart 15y ago
According to the HP board, all you need is "the right operational and communication skills and leadership abilities"...
145.
by joshhart 15y ago
The assumption doesn't have to be invalid. California citizens may be wealthier than those other states and spend more money on Amazon goods. California may also have more computer users with decent internet access than, say, Wyoming.
146.
by joshhart 15y ago
It's a hybrid OO-FP language that is statically typed with decent type inference. This has never been done before. Perl is not statically typed. You might think that's a good thing, but I don't because I routinely refactor in a large code b
147.
by joshhart 15y ago
I think you have to start very young in most sports now, not just tennis. I know swimming is that way, and Michael Phelps is a bit of an exception because he started training at the late age of 7!
148.
by joshhart 15y ago
In my opinion, working with the IntelliJ has been very easy in Scala. There's an excellent plugin that you may want to check out if you haven't already that lets you generate IntelliJ project files from sbt. https://github.com/mpeltonen/sb
149.
by joshhart 15y ago
Check out Spark, a framework for writing parallel machine learning jobs (among lots of other things) on top of hadoop. http://www.cs.berkeley.edu/~matei/spark/ They need to keep data in memory and shuffle it around really fast. To do so,
150.
by joshhart 15y ago
Are you sure about that? It could take a long time. Would you have bet on Apple if you were trying to find the next Microsoft? (Would you even consider Apple the next Microsoft?) What about Google? I don't think there is a "next Google". Wi

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