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  Tips of Drafting an R Markdown Document

When presenting the data summary and exploratory analysis, we used to copy a lot of tables, charts from Rstudio to PowerPoint, which makes the presentation preparation painful. It becomes essential for data scientists to make use of better reporting tools, such as R markdown, Jupyter notebook to prepare the analysis presentation in a more efficient and organized way. Of course, we want this to be reproducible! In this post, I would like to share some tips of using the right tools to draw tables,...

   R PROGRAMMING     2020-11-01 23:09:45

  Pointers, arrays, and string literals

A recently posted question on Stack Overflow highlighted a common misconception about the role of pointers and arrays held by many programmers learning C.The confusion stems from a misunderstanding concerning the role of pointers and strings in C. A pointer is an address in memory. It often points to an index in an array, such as in the function strtoupper in the following code:void strtoupper(char *str) { if (str) { // null ptr check, courtesy of Michael while (...

   char pointer,initialization,literal,cann     2011-09-22 13:29:23

  Avoiding and exploiting JavaScript's warts

One's sentiment toward JavaScript flips between elegance and disgust without transiting intermediate states. The key to seeing JavaScript as elegant is understanding its warts, and knowing how to avoid, work around or even exploit them. I adopted this avoid/fix/exploit approach after reading Doug Crockford's JavaScript: The Good Parts: Doug has a slightly different and more elaborate take on the bad parts and awful parts, so I'm sharing my perspective on the four issues that ha...

   JavaScript,warts,Exploit,with,variable,this     2012-02-15 05:51:21

  What is goroutine?

Casual Talk Golang is quite enjoyable to write, aside from the tedious if err != nil checks. One of the fundamental reasons for the joy is goroutine, a core feature of Golang. Understanding goroutines in detail is worthwhile, as they contribute significantly to the pleasure of working with Golang. So, let's talk about goroutines, hoping to provide some insights to the readers. TL;DR: We'll start by talking about assembling a computer, then delve into some concepts of the operating system, such ...

   EXPLANATION,GOLANG,GOROUTINE     2024-01-21 03:26:10

  Strangest line of python you have ever seen

The other day @HairyFotr and @zidarsk8 were doing some codegolfing with implementations of nondeterministic finite state machineand asked me to blog their results.For those of us who often forget what all of this computer science mumbo jumbo means, here’s a quick explanation from wikipedia:In the theory of computation, a nondeterministic finite state machine or nondeterministic finite automaton (NFA) is a finite state machin...

   Python,Strange,Research,Work rationale     2011-11-19 02:05:03

  What do programmers really do?

Computers are useless. They can only give you answers. â€“ PicassoMany people (including my mother-in-law) think that computers are becoming so smart that programmers will be no longer needed in the near future. Other people think that programmers are geniuses who constantly solve sophisticated math puzzles in front of their monitors. Even many programmers don’t have clear idea what they do.In this post I want to provide some explanation to uninformed people what programmers rea...

   Programmer,Work,Computer     2011-05-20 11:49:32

  JavaScript's Two Zeros

JavaScript has two zeros: -0 and +0. This post explains why that is and where it matters in practice. The signed zero Numbers always need to be encoded to be stored digitally. Why do some encodings have two zeros? As an example, let’s look at encoding integers as 4-digit binary numbers, via the sign-and-magnitude method. There, one uses one bit for the sign (0 if positive, 1 if negative) and the remaining bits for the magnitude (absolute value). Therefore, -2 and +2 are encoded as f...

   JavaScript,zeros     2012-03-24 05:21:49

  Lessons Learned while Introducing a New Programming Language

I've used a lot of languages (professionally) over the years: (off the top of my head) Cold Fusion, HTML, Javascript, php, SQL, CSS, ASP(classic & .net), C#, Ruby, Flex, Java, & Clojure. Each language has pros and cons. Being a programmer, it's easiest to discuss the cons - and in general I believe it was best said:I hate all programming languages - Matt FoemmelI think it's important to start with this in mind. At some point you're going to hate what you're advocating, so imagine h...

   Experience,New language,Tips,Risk     2012-03-05 05:13:59

  The Go Pointer Magic

Go is a language with the pointer type, by which we can Pass pointer into a function and update value in-place. Add methods to a struct as (* T) A, which is different from (T) A(). However, the pointer is type-safe in Go, meaning that there are such restrictions of the pointer. Different types of pointers are unconvertible. Pointer type cannot be used for calculation. Pointer types cannot be compared, either == nor !=. No mutual assignment between different pointer-...

   GOLANG,POINTER,UNSAFE     2021-10-03 02:18:57

  What’s Your Start-up’s “Bus Count”? 7 Myths of Entrepreneurship and Programming

Software development is a rapidly evolving field that got off to a very rocky start. Conventional wisdom for many years was that software engineering should be like other types of engineering: design carefully, specify precisely, and then just build it – exactly to spec. Just like building a bridge, right? The problem with this approach is that software is just that. Soft. It’s endlessly malleable. You can change software pretty much any time you want, and people do. A...

   Start-up,technical,company,tips     2011-07-04 07:44:54

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