GOLANG VS RUBYMICHAŁ KONARSKI

1

2

0,75%

1,5%

2,25%

3%

2012 2013 2014 2015 2016 2017

3

POPULARITY OF GO

0,75%

1,5%

2,25%

3%

2012 2013 2014 2015 2016 2017

source: http://www.tiobe.com/tiobe-index/go/

WHO AM I? 4

u2i

Ruby developer @

5

RESERVED KEYWORDS 6

0

45

90

135

180

JAVASCRIPT C# C++ JAVA RUBY C GO

http://stackoverflow.com/questions/4980766/reserved-keywords-count-by-programming-language

7

dynamic

interpreted (MRI)

static

compiled

object oriented

reflective concurrent

structured

garbage collected garbage collected

STATICALLY TYPED DUCK TYPING

8

9typeAnimalinterface{Speak()string

}

typeDogstruct{ageint32

}

func(dDog)Speak()string{return"Woof!"

}

funcSaySomething(aAnimal){ fmt.Println(a.Speak())}

dog:=Dog{}SaySomething(dog)

000 DESIGN

10

11Vehicle

Car Truck

PetrolCar PetrolTruck

ElectricCar ElectricTruck

COMPOSITION OVER INHERITANCE

12

13

Vehicle

Engine

Body

PetrolEngine

ElectricEngine

Car

Truck

14

typeEngineinterface{start()}

typePetrolEnginestruct{}typeElectricEnginestruct{}

typeBodyinterface{weight()int32}

typeCarstruct{}typeTruckstruct{}

typeVehiclestruct{EngineBody}

vehicle:=Vehicle{Engine:PetrolEngine{},Body:Truck{}}vehicle.start()vehicle.weight()

CONCURRENCY

15

DON'T COMMUNICATE BY SHARING MEMORY, SHARE MEMORY BY COMMUNICATING.

16

channel

channel

channel

17

Go process

goroutine goroutine

goroutine goroutine

goroutine goroutine

18

result:=<-ch

funcHeavyComputations(){...

}

ch<-result

chchanint32

ch:=make(chanint32)

goHeavyComputations(ch)

//dootherthings

19

THERE IS NOTHING EXCEPTIONAL IN EXCEPTIONS

20

iferr!=nil{log.Fatal(err)returnerr

}

f,err:=os.Open(“filename.ext")

//dosomethingwiththefile

21

GO FMT NO MORE CODE STYLE WARS

22

“LEARN AT LEAST ONE NEW LANGUAGE EVERY YEAR”

23

David Thomas and Andrew Hunt

24@mjkonarski michal.konarski@u2i.com blog.u2i.com

THANKS!