Scenario: I want to implement an infinite list: abstract class MyList[+T] case object MyNil extends MyList[Nothing] case class MyNode[T](h:T,t: => MyList[T]) extends MyList[T] //error: `val' p...

Let's assume we have the following code in a language that looks a lot like C. int A[2]; A[0]=4; A[1]=7; void f(int x, int y) { x++; A[1]++; y++; printf(x, y, A[0], A[1]); } void main()...

I am currently using CallByName to dynamically call methods. There are several methods which I pick up daily from a table in server along with the arguments. For this reason, I send an array of the...

As I understood call-by-name parameters of a method, the corresponding argument expression will not be evaluated when passing it to the method, but only when (and if) the value of the parameter is ...

Let's see the code below: import scala.language.implicitConversions class Foo implicit def int2Foo(a: => Int): Foo = new Foo def bar(foo: Foo) = {} def bar(foo: Boolean) = {} bar { println("He...

Can anyone tell me how I can implement Call By Name in C#?

def getStr(): String = { println("getStr is running") "str" } def lazyHello(para: => String) = { println("lazy hello is runing") println(para) } def notLazyHello(para: String) = { println...

I'd like to be able to mock a return value of getOrElse method so that it returns what is passed as orElse call-by-name argument with ScalaMock trait ToBeMocked { def getOrElse(arg: Int)(orElse: ...

In my principles of programming class we are talking about different calling methods. Some we discussed were: call by value call by reference call by value/result and call by name I can't find ...

Here are two statements that seem to be generally accepted, but that I can't really get over: 1) Scala's by-name params gracefully replace the ever-so-annoying log4j usage pattern: if (l.isDebu...

I've been looking at the various scala logging libraries lately, and the vast majority of them implement their logging functions as def debug(s: => String) So that if you have debug logging t...

In Perl, you are able to call a function by reference (or name) like so: my $functionName = 'someFunction'; &$functionName(); #someFunction defined here: sub someFunction { print "Hello ...