Go is a programming language developed by Robert Griesemer, Rob Pike and Ken Thompson at Google in 2009 is known for its simplicity and impressive capabilities in terms of concurrency. When compared to typed languages, like PHP, Ruby and Python Golang based applications often outperform others with their ability to handle several queries per second with minimal latency.

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One of Go’s strengths lies in its suitability for building high performance servers that efficiently handle a volume of requests within milliseconds. However, it’s worth noting that Go takes an approach to object-oriented programming than relying on classes and inheritance as seen in languages. Go utilizes structs for defining objects and composition for achieving similar functionality. Some have raised concerns about the lack of built in support for generics in the language.

In Go programming language interfaces play a role by defining sets of methods without containing any code implementation. It provides a blueprint for how objects should behave and encourages reusability.

In summary Go offers developers a learning curve while delivering features. Although it diverges from some object-oriented concepts like classes and inheritance. It compensates with its focus, on struct usage and the flexibility provided by interfaces. 

Additionally, it’s important to note that interfaces in Go do not allow the inclusion of variables. The interface type, in Go offers a deal of flexibility and ability to combine functionalities within Go applications. Interface types serve to express generalizations or abstract concepts regarding the behaviours exhibited by other types. 

key Features of Go Lang


  1. Code transparency

    With Go, you will know exactly with the code is doing and will be able to accurately estimate how much time and memory it is utilizing. Go Lang follows a standard code format generated by the FMT tool automatically. 


  1. Minimalist language

    Go is a simple language that follows a minimalistic approach. Thereby, for new developers the learning curve to not too steep. A few basic, orthogonal features compose the core Go language that can be combined in a relatively limited number of ways. This makes learning the language and reading and writing programs simpler. Expert programmers can learn the language from the specifications themselves and Go provides automatically generated documentation keeping the interface minimal with very little to learn.


  1. Better Performance

    The performance of Go Lang is enhanced by its standard libraries that provide optimized code derived from efficient algorithms. It stands against any memory leads with the garbage collected feature. Just like C or C++, go does not need any interpretation as it is a compiled language and by doing away with an interpreted your Go-built app will be more error-free. In terms of system requirements, this language is not very demanding. Wellthis means that users with older devices can also access your application.


  1. Supports Testing

    Go Lang combines unit testing and coding.  It offers an easy mechanism for writing your unit tests with your code in parallel. The tool also assists in interpreting the code coverage through your tests, benchmarking tests, and writing sample code used to produce your code documentation.

Comparing instance of Java with Go lang, Java interface explicitly implemented by Java-like shown below:


public class Foo implements InterfaceName{

}

In Golang, the interface is not implemented explicitly like java but satisfied by type method.

Go also doesn’t have the typical class-like inheritance you’re normally used to, but it does have a couple of things that are pretty close.


# interface_demo.go
package main

import "fmt"

type Foo struct {

	}

func (f Foo) String() string  {
	return fmt.Sprintf("Empty Foo")
}

func main()  {
	f := Foo{}
	fmt.Println(f)
}

When I run above code with the command `go run interface_demo.go`, it will print `Empty Foo`

As I have already mentioned that Golang does not class instead it has type and struct. On above example, method ‘string’ added to Foo struct. ‘String()’ method is defined inside stringer interface Golang. fmt.Printf calls the String method if available (checks if the provided variable satisfies Stringer interface).

Now we are going see(below code) how to duck type one subtype into superclass. We can substitute the struct variable with `interface` variable in Golang.since all struct implements interface defined function.


package main

import "fmt"

type Animal interface{
	walk()
}
type Human struct  {

	}

type Dog struct {

}

func (Human) walk(){
	fmt.Println("its human walking")
}

func (Dog) walk(){
	fmt.Println("its Dog	 walking")
}

func printall_walker(a [] Animal){
  for _, a := range a {
  	a.walk()
  }
}

func main()  {

	printall_walker([] Animal{Human{}, Dog{}})
}

As seen above, Animal is an interface where method `walk` is defined. Human and Dog struct added walk method, its mean implicitly implemented `Animal` interface. As we can see, now Human and Dog can be passed into Animal interface object.

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