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  Translating math into code with examples in Java, Racket, Haskell and Python

Discrete mathematical structures form the foundation of computer science.These structures are so universal that most research papers in the theory of computation, programming languages and formal methods present concepts in terms of discrete mathematics rather than code.The underlying assumption is that the reader will know how to translate these structures into a faithful implementation as a working program.A lack of material explaining this translation frustrates outsiders.What deepens that fr...

   Math,Algorithms,Formula,Program,Python     2011-11-14 08:43:15

  Signs that you're a bad programmer

1. Inability to reason about codeReasoning about code means being able to follow the execution path ("running the program in your head") while knowing what the goal of the code is.SymptomsThe presence of "voodoo code", or code that has no effect on the goal of the program but is diligently maintained anyway (such as initializing variables that are never used, calling functions that are irrelevant to the goal, producing output that is not used, etc.)Executing idempotent functions multiple times (...

   Sign,Programmer,Characteristics,Knowledge,Skill     2011-10-20 08:56:16

  It Should Only Take You a Few Hours...

It sure seems easy to make a table. Anyone can do it, right? Get 1 large flat rectangular piece of wood, 4 equally tall wooden poles, 4 nails and a hammer. Nail the 4 poles to each corner of the flat rectangular bit, and you have a table. Ta daaa! Now ask a carpenter to craft you a table. First they will spend time discussing the purpose and function of the table - indoor or outdoor, kitchen or dining room, for show or heavy use, what load does it need to bear. Then they will determine th...

   Programming,software,Craft     2012-03-01 05:09:10

  Text editor vs IDE

A meaningless editor war Many people like to debate which editor is the best. The biggest controversy is between Emacs and vi. vi supporters like to say: "Look it's very fast to type in vi, our fingers no need to leave the keyboard, we even no need to use the up,down,left and right keys" Emacs supporters often downplayed this and said: "What's the use of typing fast if I just need to press one key and it equals to dozens keys you type in vi?"In fact, there is another group of people who like to ...

   Editor,IDE,Structured editor,vi     2013-05-20 12:03:39

  JavaScript as a First Language

At Khan Academy we've been investigating teaching Computer Science to students in some new and interesting ways. The most interesting aspect of which is that we're likely going to be teaching them JavaScript as their first language. We're in a very unique position as we're primarily aiming to teach students who've been through our previous math and science-centric curriculum. Because of this we can create some rather compelling exercises and projects that never would've been feasible other...

   JavaScript,Learning,First language,Inheritence,Prototype     2011-12-23 07:53:45

  5 Reasons to Join a Startup After Graduating

After I wrote my last post, a surprising number of people emailed me asking why I decided to join a startup after graduating from Duke. Many of those I heard from face similar decisions today: either they are college seniors choosing between a big company and a startup, or they are recent graduates who work at a big company and are thinking about making the switch. What’s interesting is that most are already leaning towards the startup career path: it seems they just want someone to ...

   Startup,Graduation,Work,Advice,Passion,Learn     2011-11-23 08:12:13

  Why Only Designers Can Create New Programming Languages

Attempts to verify the utility of languages stifle innovation. Christopher Mims 03/06/2012 30 Comments Compared to the versions that are hacked together late at night under insane deadline pressure, the programming languages to come out of academia are failures. Well, not all of them. History can speak for itself. Via UC Irvine computer scientist Cristina Videira Lopes, who deserves credit for any insight you might get from this post, which is a ...

   Designer,Programming language,Create,Great     2012-03-19 13:22:15

  Hadoop or Spark: Which One is Better?

What is Hadoop? Hadoop is one of the widely used Apache-based frameworks for big data analysis. It allows distributed processing of large data set over the computer clusters. Its scalable feature leverages the power of one to thousands of system for computing and storage purpose. A complete Hadoop framework comprised of various modules such as: Hadoop Yet Another Resource Negotiator (YARN MapReduce (Distributed processing engine) Hadoop Distributed File System (HDFS) Hadoop Common Thes...

   COMPARISON,HADOOP,SPARK     2018-11-22 07:08:57

  C vs Java Complete Comparison

Similarities: Java and C have same syntax operators. Difference—thinking Two paradigms: Java: Object oriented language C: Structured language Differences: --Syntax No preprocessor Java does not include a preprocessor and does not define any analogs of the #define, #include, and #ifdef directives. Constant definitions are replaced with static final fields in Java. (See the java.lang.Math.PI field for an example.) Macro definitions are not available in...

   C,Java,Comparison,Difference,Similaritie     2011-10-06 12:46:39

  7 ways to start learning how to code right now for free

Learning to code is one of the most powerful and satisfying things you can ever do. If you’re a designer, learning to code can help you understand what you’re creating for, and if you’re looking to build a startup from scratch, being a technical founder can make things exponentially easier for you. No matter why you want learn, the only thing you really need is curiosity. But if you’re just starting out as a novice and don’t know where to begin,...

   Learn programming,Efficient way,Experiment,iPad     2012-02-03 08:11:21

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