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  How to draw pentagram in HTML5 canvas

I wrote simple function to this magical symbol I like so much: 123456789101112131415161718192021222324252627282930<!doctype html><html><body>    <canvas id="c" width="500" height="500"></canvas>    <script> var ctx = (document.getElementById("c")).getContext("2d"); // draws rotated pentagram with or without cirlefunction pentagram( ctx, x, y, radius, rotate, circle ){    ctx.beginPath();&nbs...

   Html 5,Canvas,pentagram     2012-04-23 12:56:06

  Microsoft: Apple UI sucks, Metro UI is philosophy

Microsoft is a typical IT company of the last century - a huge strength, but turned a little less sensitive. Now, Microsoft is trying to change the tradition of no connection between home desktop and mobile system developers, the best indicator of this effort is their design.Microsoft products, especially software products, are now gradually using a simple, plain and neat appearance: Metro. But if you think the Metro is just on Windows 8, Windows Phone, the application market and Xbox Live,...

   Windows, Metro UI,Apple     2012-04-13 07:12:21

  For Google CEO Larry Page, a Difficult Premiere Role

When Google Inc. co-founder Larry Page announced that he would take over as chief executive earlier this year, he promised that he would shake up the Internet search giant to speed up decision making. Instead, much of the shaking up has happened to the new CEO.Challenges have piled up for Mr. Page since he assumed his post in April. They include a broad U.S. antitrust probe of the company's practices; the settlement of a long-running criminal investigation into Google's adver...

   Google,CEO,Lary Page,Motorola,Role     2011-08-31 08:55:43

  Write Your Own R Packages

Introduction A set of user-defined functions (UDF) or utility functions are helpful to simplify our code and avoid repeating the same typing for daily analysis work. Previously, I saved all my R functions to a single R file. Whenever I want to use them, I can simply source the R file to import all functions. This is a simple but not perfect approach, especially when I want to check the documentation of certain functions. It was quite annoying that you can’t just type ?func&n...

   DATA SCIENCE,R PROGRAMMING,DATA ENGINEERING     2019-10-19 07:20:52

  How to create a language in one day

About a year ago I worked on a very interesting project which involved creating a unique world with all its history, people, physics, metaphysics and so forth. I like fictional worlds that are thoroughly created and I have always marveled at people like Tolkien or Richard Garriot who go such great lengths and even create languages for their worlds. I have since many years felt that it would be awesome to create my own language and I’m probably not alone in feeling that.When I started stud...

   Language,Develop,Short period,Programming language     2011-10-19 14:15:24

  How to Think Creatively

I grew up hungry to do something creative, to set myself apart. I also believed creativity was magical and genetically encoded. As early as the age of 8, I began sampling the arts, one after another, to see if I'd inherited some gift.Eventually, I became a journalist. For many years, I told other people's stories. I was successful, but I rarely felt truly creative.The first hint I might have sold myself short came in the mid-1990s. In the course of writing a book called What Really Matters, Sear...

   Creative thinking,Saturation,Incubation,Illumination,Verification     2011-11-14 08:39:11

  Hash Tables in Javascript

IntroductionHash tables are a permutation of associative arrays (i.e. name => value pairs). If you use PHP, then you are very familiar with this type of data structure already since all PHP arrays are associative.The Javascript language implements very loose and somewhat limited support for associative arrays. Any JavaScript array can use other objects as keys, making it a hash, but there exists no formal constructor for initializing them and it is more or less unweildy to work with. A short ...

   JavaScript,Hashtable,Implementation,Array     2011-11-26 02:43:40

  Why Dynamic Programming Languages Are Slow

In a statically typed language, the compiler knows the data-type of a variable and how to represent that. In a dynamically-typed language, it has to keep flag describing the actual type of the value of the variable, and the program has to perform a data-dependent branch on that value each time it manipulates a variable.  It also has to look up all methods and operators on it. The knock-on effect of this on branching and data locality is lethal to general purpose runtime performance. T...

   Dynamic language,Slow,Analysis     2012-03-26 15:33:11

  The Wasteful Legacy of Programming as Language

A few years ago I visited a friend who is a graduate student in linguistics. After some time he asked me if I was aware of the work by Chomsky on formal languages. I told him that yes, Chomsky work was a basis for much of the developments in theoretical computer science. More than that, I was glad to learn that there was something technical that I could share and discuss with other people in linguistics. At the time I found this was just a great coincidence. It was only recently, though, t...

   Programming language,Human language,Chomsky     2011-11-28 10:36:34

  How to read Haskell like Python

Have you ever been in the situation where you need to quickly understand what a piece of code in some unfamiliar language does? If the language looks a lot like what you’re comfortable with, you can usually guess what large amounts of the code does; even if you may not be completely familiar how all the language features work.For Haskell, this is a little more difficult, since Haskell syntax looks very different from traditional languages. But there's no really deep difference here; you j...

   Haskell,Python,Format,Like,Similarity     2011-11-15 08:45:39

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