12.golangbyexample/

Refer golangbyexample.com

Design pattern

01.abstrct

• abstract pattern

cd 01.abstract && go run .

02.builder

• Builder pattern

cd 02.builder && go run .

03.factory

• Factory pattern

cd 03.factory && go run .

04.object

• Object Pool Pattern

cd 04.object && go run .

05.prototype

• Prototype Pattern

cd 05.prototype && go run .

06.singleton

• Silgleton pattern

cd 06.singleton && go run .

07.chain

• Chain of Responsibility Design Pattern

cd 07.chain && go run .

08.command

• Command design pattern

cd 08.command && go run .

09.iterator

• Iterator Design Pattern

cd 09.iterator && go run .

10.mediator

• Mediator design pattern

cd 10.mediator && go run .

11.memento

• Memento design pattern

cd 11.memento && go run .

12.null

• Null object design pattern

cd 12.null && go run .

13.observer

• Observer design pattern

cd 13.observer && go run .

14.state

• State design pattern

cd 14.state && go run .

15.strategy

• Strategy design pattern

cd 15.strategy && go run .

16.template

• Template Method Design Pattern

cd 16.template && go run .

17.visitor

• Visitor design pattern

cd 17.visitor && go run .

18.adapter

• Adapter design pattern

cd 18.adapter && go run .

19.bridge

• Bridge design pattern

cd 19.bridge && go run .

20.composite

• Composite design pattern

cd 20.composite && go run .

21.facade

• Facade design pattern

cd 21.facade && go run .

22.flyweight

• flyweight design pattern

cd 22.flyweight && go run .

23.proxy

• proxy design pattern

cd 23.proxy && go run .

24.inherit

• OOP: Inheritance

cd 24.inherit && go run .

25.polymorphism

• OOP: Polymorphism

cd 25.polymorphism && go run exaxmple.go

• Runtime Polymorphism

cd 25.polymorphism && go run exaxmple_tax.go

• Function/Method overloading

cd 25.polymorphism && go run exaxmple_overloading.go

26.abstract

• Abstract class

cd 26.abstract && go run example.go

27.Encapsulation

• Encapsulation

cd 27.encapsulation && go run example.go

28.ProtocolBuffer

• Protocol Buffers

cd 28.ProtocolBuffer
protoc -I ./ --go_out=./ ./person/person.proto
go run main.go

Files

29.readfiles

• Read a large file word by word
• Read a large file line by line

cd 29.readfiles
go run word.go
go run line.go

30.writefiles

• write to a file
• append to a file

cd 30.writefiles && go run write.go
cd 30.writefiles && go run writeFile.go

31.deletefile

• Delete a file
• Delete a folder

cd 31.deletefile && touch sample.txt; go run del_file.go
cd 31.deletefile && mkdir sample && go run del_folder.go

32.updatefile

• Change the modified/updated time and access time of a file

cd 32.updatefile && touch sample.txt; go run update_file.go

33.genericfile

• Check if a file is a directory in Go
• Create an empty file in Go
• Iterate over a directory tree
• Touch a file in Go
• Move file from one location to another

34.time

• time and date in Go

35.os

• Execute shell file

36.array

• Check if an item exists in a slice

37.map

• Different ways of iterating over a map

38.query_params

• net/http package get Query Params

curl -v "http://localhost:8080/products1?filters=red&filters=color&filters=price&filters=brand"
curl -v "http://localhost:8080/products1?filters=color"

curl -v "http://localhost:8080/products2?filters=red&filters=color&filters=price&filters=brand"

curl -v "http://localhost:8080/products3?filters=red&filters=color&filters=price&filters=brand"

curl -v "http://localhost:8080/products4?filters=red&filters=color&filters=price&filters=brand"

39.queue

• queue

40.stack

• Stack

41.set

• Set implementation

42.linkedlist

• Linked List

43.binarysearch

• Binary Search tree
• Iterative Binary Search Tree

44.heap

• Heap

45.trie

• Trie Implementation

46.sort

• Heap sort

47.network

• Validate an IP address
• Check if an IP address is IPV4 or IPV6
• Get the IP address from an incoming HTTP request

curl -v -X GET http://172.17.0.2:8080/getIp
curl -v -H "X-REAL-IP: 172.17.0.2" -X GET http://172.17.0.2:8080/getIp
curl -v -H "X-FORWARDED-FOR: 172.17.0.2" -X GET http://172.17.0.2:8080/getIp

48.logger

• Go Logger Rotate

49.channel

• channel as function argument

50.goroutine

• Get number of currently running/active goroutines
• Wait for all Go routines to finish execution

51.datatypes

• All data types