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Paradigms of Iteration in JavaScript
One of the joys of programming is that no matter how simple a problem may seem there are always tons of ways to solve it. It can be good practice to go back and revisit fundamentals by solving simple problems with as many implementations as you can think of. In this post we'll explore approaches to basic iteration in JavaScript. This style of exercise is a good interviewing technique, too, because it's open ended and leads to good discussions. The focus isn't a tricky, wacky problem you're...
JavaScript,Iteration,Wrap,Recursive,For,Loop 2012-01-08 10:11:15
API Design is UI for Developers
I’ve been thinking a lot about APIs and their design recently.I stumbled on this fantastic quote from Greg Parker: A programming language is a user interface for developers. Language authors should learn from HCI principles.22/02/2012 19:10 via webReplyRetweetFavorite@gparkerGreg ParkerWhen I first started learning C++ (back in the bad old days) I was convinced that any 1st year student could design a better programming language. One which behaved in a sane fashion without a lot of le...
API design,UI,developers,PHP 2012-03-11 13:21:43
Notes on Programming in C
Introduction Kernighan and Plauger's The Elements of Programming Style was an important and rightly influential book. But sometimes I feel its concise rules were taken as a cookbook approach to good style instead of the succinct expression of a philosophy they were meant to be. If the book claims that variable names should be chosen meaningfully, doesn't it then follow that variables whose names are small essays on their use are even better? Isn't MaximumV...
20 Database Design Best Practices
Use well defined and consistent names for tables and columns (e.g. School, StudentCourse, CourseID ...).Use singular for table names (i.e. use StudentCourse instead of StudentCourses). Table represents a collection of entities, there is no need for plural names.Don’t use spaces for table names. Otherwise you will have to use ‘{‘, ‘[‘, ‘“’ etc. characters to define tables (i.e. for accesing table Student Course you'll write “Student Cour...
Database design,20 tips,Well defined name,Design pattern 2012-02-07 12:10:48
Why localStorage only allows to store string values
localStorage allows data to be stored in browsers across sessions, the data will be there even though the session is expired. It is frequently used to store static data so that they can be loaded when needed. But as per spec, it says that the keys and the values are always strings (note that, as with objects, integer keys will be automatically converted to strings). Why cannot store the object as it is? Take a look at an example: var str = "test"; localStorage.setItem("str", str); cons...
JAVASCRIPT,LOCALSTORAGE 2020-04-05 00:54:29
How To Write A Good Programming Test
I’ve taken and marked a lot of programming tests in the past. I love doing them as it’s always good to see what challenges different programmers have come up with when designing them. Unfortunately, however, most of them aren’t very good. Below is a list of general ideas to help increase the quality of programmer tests. 1. Keep it relevant Too many of the tests have questions on content that simply isn’t relevant to the job. The whole idea behind a programming test i...
Programming test,Interview,Questions,Pro 2011-08-26 02:46:44
C/C++ Pointer Declaration Syntax – It makes sense!
I never really liked the way pointers are declared in C/C++: int *a, *b, *c; // a, b and c are pointers to int The reason is that I am used to reading variable declarations as MyType myVar1, myVar2, myVar3; and I always read “int*†as the type “integer pointerâ€. I therefore wanted the following int* a, b, c; // a is a pointer to int, b and c are ints to mean that a, b and c all were of type int*, i.e. pointers to int. and I therefore found it slightly a...
C,Pointer,Declaration,Attempt 2012-02-22 05:43:58
SpaceX's Starlink satellites were endangering other satellites
On 3 Dec 2021, The Permanent Mission of China sent a note to UN General Assembly complaining two dangerous approaches to China's Shenzhou space station from SpaceX's Starlink satellites during 2021. These two dangerous approaches were happening in July and October respectively and they almost caused collisions of the Starlink satellites and the Shenzhou space station because the two SpaceX satellites manoeuvred continuously to the orbit of China's space station. These dangerous approaches forced...
SHENZHOU SPACE STATION,SPACEX STARLINK,CHINA SPACE STATION 2021-12-27 10:56:51
Paint messages will come in as fast as you let them
There is a class of messages which are generated on demand rather than explicitly posted into a message queue. If you call GetÂMessage or PeekÂMessage and the queue is empty, then the window manager will look to see if one of these generated-on-demand messages is due, messages like WM_TIMER, WM_MOUSEÂMOVE, and WM_PAINT. Neil wonders, "In that program that called InvalidateÂRect 100,000 times, how many paint messages were generated?" The Zen answer to this question is "Yes." A ...
WM_PAINT,paint message,work,Mouse move 2011-12-21 09:37:14
About go get and go install in Go 1.16
Go version 1.16 beta1 has been released on 18 Dec 2020, major features of Go 1.16 have been finalized with this beta release. Many people are discussing about the support of Apple M1, however, this post will not cover this topic. Instead the focus will be on go get and go install changes. There are lots of changes related to modules in Go 1.16, the details can be found in the release note. Below are some of the key highlights. GO111MODULE is on by default, if wanna keep old behavior, needs...
GOLANG,GO 1.16,GO INSTALL 2020-12-26 00:26:58
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