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Learning Go by examples: part 1 - Introduction
Former Java developer for 10 years, I discovered Golang (aka Go) over 4 years ago and fell in love with its simplicity and learning curve. It's easy to start creating an application in Go but you have to dig deeper to avoid falling into certain pitfalls ^^.
I like the explanation by example, so in this new series of articles, I will try to introduce you to Go with concrete applications in each article.
Let's start this serie with a prerequisite ;-).
The first thing to do is to install Golang in your local computer. You can follow the installation procedure on the official website but I recommend to install and use GVM, a Go version manager, that will allow you to install and update the versions of Go by specifying which version you want.
For bash:
bash < <(curl -s -S -L https://raw.githubusercontent.com/moovweb/gvm/master/binscripts/gvm-installer)For zsh:
zsh < <(curl -s -S -L https://raw.githubusercontent.com/moovweb/gvm/master/binscripts/gvm-installer)Usage:
$ gvm
Usage: gvm [command]
Description:
GVM is the Go Version Manager
Commands:
version - print the gvm version number
get - gets the latest code (for debugging)
use - select a go version to use (--default to set permanently)
diff - view changes to Go root
help - display this usage text
implode - completely remove gvm
install - install go versions
uninstall - uninstall go versions
cross - install go cross compilers
linkthis - link this directory into GOPATH
list - list installed go versions
listall - list available versions
alias - manage go version aliases
pkgset - manage go packages sets
pkgenv - edit the environment for a package setThe GVM command that will interest us especially is the command
gvm install, which we can use like this:$ gvm install [version] [options]Go installation:
$ gvm install go1.16.5 -B
$ gvm use go1.16.5 --defaultIn your
.zshrc or .bashrc file, set your $GOROOT and $GOPATH environment variables.Here is an example:
[[ -s "$HOME/.gvm/scripts/gvm" ]] && source "$HOME/.gvm/scripts/gvm"
export GOPATH=$HOME/go
export GOBIN=$GOPATH/bin
export PATH=${PATH}:$GOBIN:$GOROOT/binNow we can check our current Go version:
$ go version
go version go1.16.5 darwin/amd64Cool!
We now know how to install and switch between different versions of Go. We now can create our first applications!
We now know how to install and switch between different versions of Go. We now can create our first applications!
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