Is it possible to have an anonymous method when creating a list of items, with .NET + Linq?

Question

i'm trying to do the following, but not sure how ...

var foo = new Foo
    {
        Id = MyRandom<int>(1, 100),
        Name = MyRandom<string>(5,20),
        MyPets = MyRandom<bool>() ?
            new IList<Pet>
            (petList =>
                { 
                   var x = MyRandom<int>(1, 4);
                   for (int i = 0; i < x; i++)
                   {
                       petList.Add(new Pet(MyRandom<string>(1,15));
                   }
                }
            : null
    };

so .. this creates a random list of pets.

Any ideas?

yeah, it was just pseduo code... to get the point across.. – Pure.Krome Jun 30 '11 at 15:19 — Pure.Krome, Jun 30 '11 at 15:19
i thought that but i noticed it and it annoyed me... sorry – harryovers Jun 30 '11 at 15:22 — harryovers, Jun 30 '11 at 15:22

score 3 · Accepted Answer · answered Jun 30 '11 at 12:52

3

No.

Instead, you can create a lambda expression, then call it immediately:

MyRandom<bool>() ? null : (new Func<IList<Pet>>(() => { return ... })()

answered Jun 30 '11 at 12:52

SLaks

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@SLaks - how do i return a new list with the items randomly added, though? – Pure.Krome Jun 30 '11 at 15:20
@Slaks - yeah :) that's what i tried .. but what do i need to do to ADD an item to petlist? ie. what is the petlist variable? – Pure.Krome Jul 01 '11 at 02:01
@Pure: You need to declare the variable in the lambda. – SLaks Jul 01 '11 at 02:08
hmmm. i'm just not getting it :( Here's my latest attempt: http://codepaste.net/dcux6p – Pure.Krome Jul 01 '11 at 15:09
1

@Pure: You need to call the delegate by adding `()` at the end. – SLaks Jul 01 '11 at 15:18
AHH! so close :) Thanks heaps mate. I really do appreciate it. Totally missed that last bit.... – Pure.Krome Jul 02 '11 at 01:56

score 2 · Answer 2 · answered Jun 30 '11 at 12:59

Have you tried something like this?

var foo = new Foo
    {
        Id = MyRandom<int>(1, 100),
        Name = MyRandom<string>(5,20),
        MyPets = MyRandom<bool>() ?
            Enumerable.Range(0, MyRandom<int>(1, 4))
                .Select(_ => new Pet(MyRandom<string>(1,15)))
                .ToList()
            : null
    };

Is it possible to have an anonymous method when creating a list of items, with .NET + Linq?

2 Answers2