Type conversion The expression T(v) converts the value v to the type T. In Go, assignment between items of different type requires an explicit conversion. Here’s an example. 1 2 3 4 5 6 7 8 9 10 11 12 13 package main import ( "fmt" "math" ) func main() { var x, y int = 11, 12 f := math.Sqrt(float64(x*x + y*y)) var z uint = uint(f) fmt.Println(x, y, z) } Type assertion Type assertion provides access to an interface value’s underlying concrete value.

What is unit testing? Unit testing is the process where you test the smallest functional unit of code. Software testing helps ensure code quality, and it’s an integral part of software development. It’s a software development best practice to write software as small, functional units then write a unit test for each code unit. You can first write unit tests as code. Then, run that test code automatically every time you make changes in the software code.

To be clear, Go does not have reference variables, so Go does not have pass-by-reference function call semantics. Dave Cheney What is a reference variable? In languages like C++ you can declare an alias, or an alternate name to an existing variable. This is called a reference variable. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 #include <stdio.

AWS IAM Assume Role is a mechanism that enables a user or service to assume a specific IAM role temporarily. This allows the user or service to acquire temporary security credentials, including access keys, session tokens, and permissions, to perform actions within AWS resources. The assumed role can have different permissions and policies than the original user or service, ensuring a granular level of access control and reducing the need for sharing long-term credentials.

There may be a case where you want to use WSL(Windows Subsystem for Linux) via a remote SSH connection. Configuring a remote SSH connection to WSL is not necessarily straightforward because: You need to configure port forwarding from WSL to the host machine WSL does not have systemd, so you need to configure automatic booting of WSL and then SSH server inside it(because you will want to automate everything). Well, let’s take a look at the configuration process step by step.

There are several modes in VIM. NORMAL, INSERT, VISUAL are most common ones. The Most Used Default Key Bindings :q: quit VIM. :wq: save the current buffer and quit. :q! discard unsaved changes and quit h, j, k, l: Movement. Example: 8k - move 8 lines up :99: jump to the line 99 w: move one word forward b: move one word backward $: move to the end of the current line 0: move to the beginning of the current line o: insert a new line below and go insert mode O: insert a new line above and go insert mode A: go insert mode at the end of the current line y: yank (copy) selected text p: paste the yanked text d: delete the selected text dd: delete the current line x: delete the cursor character v: select the cursor character V: select the current line :sp: split the screen horizontally :vs: split the screen vertically /john: search for “john” in the current file buffer n: jump to the next search result N: jump to the previous search result gg: jump to the top of the current file G: jump to the bottom of the current file %: jump to the closing/opening pair bracket :%s/abc/xyz/g: replace every “abc” with “xyz” in the current file :vimgrep: search current directory, see the help for more info :help: open VIM help Vim “leader” Key <leader> key is a vim tool that can be used to create personalized shortcuts.

There might be a chance that you need to create and use a separate github(or bitbucket) account other than your personal one in your workplace. And Github(Bitbucket or Gitlab will do the same I believe) doesn’t allow to share a ssh key between different accounts for authentication. That’s the case we are going to figure out below. First of all, create a new ssh key pair on your machine. 1 2 3 ssh-keygen -t ed25519 -C "your_email@example.

“Test Double” is a generic term for any case where you replace a production object for testing purposes. I believe the following description provides a more intuitive understanding of the concept. A Test Double is an object that stands in for a real object in a test, similar to how a stunt double stands in for an actor in a movie. There are various kinds of test doubles: Dummies, Stubs, Mocks, Spies, Fakes.

Install pyenv to manage multiple python versions This gist self-explains how to install pyenv and use it to manage multiple python versions on your machine Manage virtual envs A virtual env is where dependencies live without polluting the global space of the current python version, preventing dependency version conflicts between different projects on the same machine. Install virtualenv package: pip install virtualenv virtualenv --version It’s common that .gitignore file excludes virtual env directories named venv, env, .

I love to use vim everywhere. Almost all the linux distros and macOS come with Vim pre-installed, but what about Windows? You can stick to the vim within the Windows Git Bash(you should know git because that’s what makes you a developer :D) with a Linux-like configuration, but you may notice that :w command lags for some reason. So why not use Neovim(nvim) on Windows? Let’s get to it! Open powershell and run the command below to install Neovim on your system.