Generics in Golang

Why generics are so important and why they can save you tons of time. 

Let's try to figure it out.

Start with a simple example: 

func sumOfSome(input int64) int64 {
	var sum int64
	for _, v := range input {
		sum += v
	}
	return sum
}

But what to do if we need not only int64?

In this case, generics will help us.

type Number interface {
	float64 | int64 | int
}


func sumOfSome[T Number](input []T) T {
	var sum T
	for _, v := range input {
		sum += v
	}
	return sum
}

First of all we need create an interface with all types (float64, int64, int) which we whant to sum.

First post

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