logo
down
shadow

Groovy method with optional parameters


Groovy method with optional parameters

Content Index :

Groovy method with optional parameters
Tag : groovy , By : enginecrew
Date : November 24 2020, 05:44 AM


Comments
No Comments Right Now !

Boards Message :
You Must Login Or Sign Up to Add Your Comments .

Share : facebook icon twitter icon

When interface method has no parameters why isn't the implementation recognised of a method with all optional parameters


Tag : chash , By : nabbed
Date : March 29 2020, 07:55 AM
I hope this helps you . These are two different methods. One with two parameters, one with zero. Optional parameters are just syntactic sugar. Your method B will be compiled to the following:
public void B()
{
    Test test = new Test();
    Console.WriteLine(test.A(7, 6));
}

C# : overriding Method with optional parameters & named parameters : Unexpected Result


Tag : chash , By : Cosmin
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further Argument binding for the method call firstProcess.Calculate(x: 1, y: 2) is done at compile time, but method dispatch is done at runtime because the method is virtual.
In order to compile the method call, the compiler sees x: 1, y: 2 and needs to resolve this named argument list to a sequentially indexed argument list in order to emit the appropriate IL (push the arguments on the stack in the right order, then call method).
firstProcess.Calculate(1, 2);
public class FirstProcess
{
    public virtual void Calculate(int x = 10)
    {
        Console.WriteLine("First Process  X :{0}", x);
    }
}

public class SecondProcess : FirstProcess
{
    public override void Calculate(int x = 20)
    {
        Console.WriteLine("Second Process  X :{0}", x);
    }
}

var secondProcess = new SecondProcess();
var firstProcess = (FirstProcess) secondProcess;

secondProcess.Calculate(); // "Second Process X: 20"
firstProcess.Calculate();  // "Second Process X: 10"

Guava Optional as method argument for optional parameters


Tag : java , By : John Bentley
Date : March 29 2020, 07:55 AM
like below fixes the issue
What are your suggestions on usage of Optional for this scenario?
getBooks(String catalogId, String categoryId = null)
getBooks(String catalogId, String categoryId)
getBooks(String catalogId)

groovy call for optional parameters


Tag : groovy , By : user143729
Date : March 29 2020, 07:55 AM
will be helpful for those in need With optional parameters, yes you'd have to call display(null, 20). But you can also define method to accept a Map instead.
void display(Map params) {
    if(params.a && params.b) throw new Exception("A helpful message goes here.")

    if(params.a) { // use a }
    else if(params.b) { // use b }
}
display(a: 'some value')
display(b: 'some other value')
display(a: 'some value', b: 'some other value') // This one throws an exception.

How to have optional named arguments in Groovy method


Tag : groovy , By : Daniel Reslie
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further The groovy parser needs some information to work with in order to determine which method to execute.
So if you write:
test('yet', 'another good', anything:'notneeded')
test([anything:'notneeded'], 'yet', 'another good')
​def test(some, thing='default value'){
    test([:], some, thing)
}
Related Posts Related QUESTIONS :
shadow
Privacy Policy - Terms - Contact Us © scrbit.com