programming

Information related to computer programming

44 engineering management lessons alvin May 21, 2017 - 5:43pm

This is a good post from 2014 titled, 44 engineering management lessons.

The karma of bad software documentation alvin May 18, 2017 - 3:43pm

Tried to use someone’s software library.
Documentation was bad, couldn’t get it to work.
Used someone else’s.

#haiku-ish

If testing costs more than not testing, then don’t test alvin May 17, 2017 - 3:17pm

“If testing costs more than not testing, don’t test.”

~ Kent Beck (via this twitter page)

Program testing can be used to show the presence of bugs ... alvin May 15, 2017 - 10:58am

“Program testing can be used to show the presence of bugs, but never to show their absence.”

~ Edsger Dijkstra

Set theory explained with southern colloquialisms alvin May 11, 2017 - 1:46pm

A visual image of the mathematical concept of “sets” using southern colloquialisms.

(I found this image on Twitter, but since I didn’t “like” it at the time I can’t find who created it, but I’ll link to them if/when I ever find the page again.)

Functional programming: Everything is immutable alvin May 6, 2017 - 12:38pm

“Remember how weird it seemed when you first learned that a String in Java was immutable? Well, in functional programming it’s all like that. Everything is immutable.”

(From a discussion with a Java developer recently.)

An insight on the relation between latency and throughput alvin March 9, 2017 - 8:29am
Take time to think(!) alvin February 5, 2017 - 10:43pm

As a note to my future self: Take time to think!

*sigh*

Even at my advanced age, if I don’t think through an algorithm I can still waste an awful lot of time.

As an example I just started working on a complex algorithm for my Android football game based on the initial thoughts in my brain, and came to regret it. After recovering from that faux-pas I decided to write just a few simple notes like this to clarify my thoughts:

Lisp: What is an S-expression? alvin February 5, 2017 - 2:02pm

I spent some time last night reading the book, Practical Common Lisp. In all Lisp books you’ll read about S-expressions, but very few authors explain what they are. This image comes from this Wikipedia page, which states, “In computing, s-expressions (for “symbolic expression”) are a notation for nested list (tree-structured) data, invented for and popularized by the programming language Lisp, which uses them for source code as well as data. In the usual parenthesized syntax of Lisp, an s-expression is classically defined as a) an atom, or b) an expression of the form (x . y) where x and y are s-expressions.” See that link for more information about Lisp and S-expressions.

The history of Lisp alvin February 4, 2017 - 9:34pm

I’ve been interested in the Lisp programming language since I first learned about it, but in the books I’ve read about it, no author has explained the background of terms like cons, car, cdr, and S-expressions. Tonight I found this “History of Lisp” document, which explains the meaning of some of those names.

(If you’re really interested in those terms, this Wikipedia page describes them even more.)