It is easy to write a hello world program in Node.js:
console.log("Hello world!")
However, due to the asynchronous nature of Javascript, reading inputs and writing outputs are less straight-forward. We have to pass the callback functions or register event listeners.
For example, to read some …
It is common to organize the code in several modules when we are developing
Javascript applications. In Node.js ecosystem, we can import a module with
the require() function and export symbols by adding them to the
module.exports object. On the other hand, ES2015 adds import
statements and export …
ECMAScript 2015 (also known as ES2015 or informally ES6) is the latest standard for JavaScript. It has been released for a while. However, V8, the JavaScript engine for Node.js, has only limited ES2015 support. As of writing, according to ECMAScript 6 compatibility table, the feature coverage of each Javascript …
I would like to launch ssh-agent and add my private key at the beginning of
my shell script and stop it before leaving the shell script. How do I
guarantee that ssh-agent will be shutted down properly? What will happen
if the user press Ctrl-C or even kill the shell …
GDB is a powerful debugger. Without a doubt, we can debug multi-threaded programs with gdb. In particular, we can switch between threads, inspect the stack, and dump the registers. In this post, I would like to start with the Dining Philosophers Problem, which was first coined by Edsger Dijkstra.
Here …
There are some files that shouldn't be tracked by Git at all. For example, the temporary files created by the text editors, the Python bytecode, and etc.
How could we ignore those files? In the previous post, I have mentioned
that we can create a .gitignore file and list the …
Although I have written Python for several years, I am still not very familiar with its idioms. In particular, I don't quite understand how to compare and sort the objects in Python. That's the reason why I am writing this article.
The rest of this article consists of following sections …
