Categorygithub.com/Boukabouya/Golang
modulepackage
0.0.0-20240422105643-fe15f1cb026d
Repository: https://github.com/boukabouya/golang.git
Documentation: pkg.go.dev
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# README

Golang

golang tutorial 1 - in golang everythig is modular. gonalg basics :

  • complied language and go tool run file directly, without VM
  • Executable are different for OS

what and where i can use it

system apps to web apps -Cloud Already in production

Don't bring baggage

  • The mindset of this programming language is different from other languages.

  • but it similare to c and java and pascal

Object Oriented

  • Yes and No what you see in the screen is the code

missing

  • it really missing but not lagging
  • No try catch
  • lexer does a lot of work

by installing go intellisense we don't need to write import we just write function directly

Lexer

  • In Go, semicolons are automatically removed in most cases but it's not the valide syntax , but there are some exceptions where we put it like loop.
  • After installing the go intellisense The lexer in programming languages that ensures correct syntax and variable definitions and automatically inserting semicolons in code.

Types

  • case insensitive : capital for the first letter -> exported and public small for the first letter -> private

  • Variables in golang should be known in advance and every thing is type in glonag .

simple types

string integers float bool complex

Advenced types

Arrat Slices Maps Structs Pointers functions channels ... almost everything

Build for windows , linux and mac

  • we just type
go env

go env is a tool to view and temporarily modify Go environment variables that configure aspects of the Go build process and from it we could see GOOS that mean the os that we go build and we could change it by add GOOS before the go build cli

# GOOS="windows" ND GOOS="linux" 
GOOS="darwin" go build # for macos

Memory management in golang

The “new” and “make” keywords are used to allocate memory in Golang.

new()

Allocate memory but not initilised you will get a memory address zeroed storege it's mean we could not put any data

make()

Allocate memory and initilised you will get a memory address non -zeroed storege it's mean we could put any of the data

GC garbge collector happens auto

the GC manages the allocation and release of memory and it's released the unused objects and out of scope or nil