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  Generate first N prime numbers

Recently I am taking an online course named "Startup Engineering" on coursera. There is one assignment which is to use NodeJS to write a program to generate the first 100 prime numbers. This may be very easy for many people. Here I just want to share with you the code to generate not only the first 100 prime numbers. but also any number of prime numbers. Below is the code snippet: //Helper class to generate prime numbers var PrimeProcessor=(function(){ var primeArray=[]; functio...

   Algorithm,Prime number,NodeJS,coursera,JavaScript     2013-06-29 22:08:22

  How To Find a Great Start-Up Idea

Most people believe that the first step to starting a new company is to have a great idea. Back in business school, there were countless “idea brainstorming” sessions where groups of students would try to come up with the next billion dollar idea. None of them ever turned into anything.Great businesses are not built on ideas for marginal improvements or incremental features, they solve real problems and require a deep understanding of what those problems are. So the absolute worst th...

   Startup idea,Implement,Quickness     2012-03-18 00:26:22

  Short SASS tutorial

If you learned CSS before, you should know that CSS is not a programming language. You can use it to design webpage style, but you cannot use it for programming, i.e, CSS is what designer uses, not what programmer uses. Programmer may think that CSS is very troublesome, it has no variables, no conditional statements, it just allows line-by-line description of HTML elementsLuckily, CSS preprocessor appear which makes CSS programmable. The general idea of CSS preprocessor is using a programming la...

   CSS,SASS,programmable,variable,condition,comment     2012-06-22 08:38:18

  Dividing any number By 9, 90, 900 and so on

The technique for Dividing any number by 9 mentally is simply to reduce a complex division to a very simple addition. The technique can be applied from both ends i.e. from right-most digit or from left-most digit. Dividing by 9 into a mixed number from right-most digit uses the Divisibility Rules for 9: 1.     First, add all the digits together and divide by 9, keeping in mind the whole number and the remainder. 2.     Write the remainder o...

   9,90,division,algorithm     2012-03-07 05:15:06

  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

  ECMAScript 6 looks promising

I am quite excited about ECMAScript 6, after watching David Herman’s talk at YUIConf 2011. I am especially looking forward to seeing some of these features landing up on V8 soon, so that I can use it on node.js. These additions will solve many common sources of frustration that newcomers face when working with JavaScript. Although the spec is not expected to be finalized till 2013 (so says David in the video), a lot of these features are expected to hit Chrome and Firefox much befor...

   ECMAScript 6,JavaScript,new feature,let,template     2011-12-07 03:21:40

  Learn Vim Progressively

tl;dr: Want to learn vim (the best text editor known to human kind) the fastest way possible. I suggest you a way. Start by learning the minimal to survive, then integrate slowly all tricks.Vim the Six Billion Dollar editorBetter, Stronger, Faster.Learn vim and it will be your last text editor. There isn’t any better text editor I know. Hard to learn, but incredible to use.I suggest you to learn it in 4 steps:SurviveFeel comfortableFeel Better, Stronger, FasterUse vim ...

   Vim,Learning,Skills,Tips,Steps,Progressi     2011-09-08 10:44:06

  Use Java ThreadLocal with caution

According to Oracle documentation, ThreadLocal is a class provides thread-local variables. These variables differ from their normal counterparts in that each thread that accesses one (via its get or set method) has its own, independently initialized copy of the variable. ThreadLocal instances are typically private static fields in classes that wish to associate state with a thread. In short, ThreadLocal variables are variables belong to a thread, not a class or an instance of a class. One common...

   JAVA,MEMORY LEAK, THREADLOCAL     2015-11-03 07:31:57

  Is Scala Only for Computer Scientists?

I have experience struggling through these kinds of things andI know enough about the subject that I can understand why they did it that way. But my concern is that this should be an example that a beginner could understand, and they can't. There's too much depth exposed. Here's the example, which is written as a script: import scala.io.Source._ case class Registrant(line: String) { val data = line.split(",") val first = data(0) val last = data(1) val email = data(2) val payment = da...

   Scala,Application field,Computer science     2012-02-17 07:46:40

  Deep inside ARM's new Intel killer

ARM has swung a one-two punch at Intel's plans to muscle in on the smartphone and tablet space that's currently dominated by the plucky chip designers from Cambridge.At press soirées in London and San Francisco on Wednesday, ARM announced both a design for a tiny new chip, the Cortex-A7 MPCore, and a system-on-chip scheme that will marry the new A7 with the much more robust Cortex-A15 MPCore, which was announcedlast September and which should see the light of day next...

   ARM,Killer,Intel,Chipzilla,Performance     2011-10-22 12:55:23

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