thesweeheng.wordpress.com
k & q | thesweeheng's weblog
https://thesweeheng.wordpress.com/k-and-q
American Binomial Model in Python. American Binomial Model in q. European Binomial Model in q and Python. Binomial distribution in q. GAE: Storing serializable objects in datastore. American Binomial Model in Python. The k and q languages are general purpose programming language developed at Kx. For their kdb database. The q language is built on top of the k language (specifically k4, the 4th generation of the k language) which has roots in APL. 20091209: American Binomial Model in q. 20080616: AES in q.
lifeisalist.wordpress.com
FD Lectures | me, q and kdb+
https://lifeisalist.wordpress.com/dive-into-q/fd-lectures
Me, q and kdb. Weblog about learning q and kdb. Q tips & tricks. Multi-Partitioned kdb Databases: An Equity Options Case Study. Order Book: a kdb Intra-Day Storage and Access Methodology. Kdb Data Management: Sample Customisation Techniques. Market Fragmentation: A kdb Framework for Multiple Liquidity Sources. Columnar Database and Query Optimization. Transaction Cost Analysis Using kdb. Common Design Principles for kdb Gateways. The Application of Foreign Keys and Linked Columns in kdb. An Interview wit...
lifeisalist.wordpress.com
q tips & tricks | me, q and kdb+
https://lifeisalist.wordpress.com/q-tips-tricks
Me, q and kdb. Weblog about learning q and kdb. Q tips & tricks. Q tips & tricks. Clever trick with exec. Geeky table’s schema definition. Getting day of the week. User accounts in kdb. Command line arguments and regular expressions. Mystery of functional select. Leave a Reply Cancel reply. Enter your comment here. Fill in your details below or click an icon to log in:. Address never made public). You are commenting using your WordPress.com account. ( Log Out. Notify me of new comments via email.
getkerf.wordpress.com
Scott Locklin | Kerf blog
https://getkerf.wordpress.com/author/scottlocklin
Author Archives: Scott Locklin. May 16, 2016. Kerf meets the smartgrid. Let’s say we have some simple meter data with the average power usage per installation. No temperature or weather data here, so we’ll pretend these things are not important. KeRF meta table(smeter) column type type name is ascending is disk Power -3 float vector 0 1 time -4 stamp vector 0 1 installation 8 enum 0 1 len smeter 21894311. The snippet of result I included from the selection gives the average power for different months and...
getkerf.wordpress.com
An Introduction to Combinators | Kerf blog
https://getkerf.wordpress.com/2016/02/09/an-introduction-to-combinators
February 9, 2016. An Introduction to Combinators. One of the most powerful features of Kerf. Depending on how the interpreter is implemented, you may have to parse each line in the loop for every iteration in the loop; you have to evaluate test conditions, maintain state and so on. Timing(1) a:rand(1000000,1.0) fold a 1ms. This is a trivial application, but it illustrates the power of the idea, and its speed in action. Tell the interpreter to do a lot of things at once, and it will be done at close t...
lifeisalist.wordpress.com
Coding Rules | me, q and kdb+
https://lifeisalist.wordpress.com/dive-into-q/coding-rules
Me, q and kdb. Weblog about learning q and kdb. Q tips & tricks. 8230; for mortals. Explicit is better than implicit. I really don’t like to work with code that follows random coding rules or something that looks like coding rules for hard-cores. Instead of concentrating on what the code does, I spend my time on finding out where one expression ends and another one starts, whether it is a local or global variable and is that still. If you feel the same about q coding, you should know that using. And I al...
code.kx.com
Articles - Kx Wiki
http://code.kx.com/wiki/Articles
Q for Gods Whitepaper Series. Financial Math in Q. A conversation with Arthur Whitney (2009). An interview with Arthur Whitney (2004). Array languages for Lisp programmers. Slobodan Blazeski, Vector 24#2. Boyko Bantchev's K place. Enhancing Time Series Data by Applying Bitemporality. Fire from Heaven - review of Q for Mortals. Adrian Smith, Vector 23#4. K as a Prototyping Language. Book review: Q Tips: Fast, Scalable and Maintainable Kdb. Yang Guo, Vector 26#2. Tables with calculated columns. 7 Common De...
martincmartin.com
What I’ve Learned From Programming In Lisp | Martin C. Martin
https://martincmartin.com/2008/03/15/what-ive-learned-from-programming-in-lisp
Martin C. Martin. Inspiring Lunatics, Tainting Meats. Where are the fast dynamic languages? What I’ve Learned From Programming In Lisp. March 15, 2008. Two years ago I landed a job at ITA Software,. One of the “ten or twenty places where hackers most want to work,” along with Google. And one of the interesting things about ITA is that the majority of their software is written in Lisp. And most of the U.S. airline websites, among others. The main things I’ve learned are:. To sequence instructions, and a l...
