Функции

Способы объявления функций

Typescript

function myFunction(a: number): number {
	return a
}

const myFunction = function(a: number): number {
	return a
}

const myFunction = (a: number): number => {
	return a
}

Golang

func divide(x, y int) (int, error) {
	if y == 0 {
		return 0, errors.New("division by zero")
	}
	return x / y, nil
}

divide := func(x, y int) (int, error) {
	if y == 0 {
		return 0, errors.New("division by zero")
	}
	return x / y, nil
}

Postgresql

create or replace function example(foo integer) returns integer as $$
declare
	bar integer;
begin
	bar = 1;

	return foo + bar;
end;
$$ language plpgsql;

select example(4);