Combing Array Inline - LINQ

Question

I am initialising and array from items in a list as follows:

MyArray[] Arrayitems = SomeOtherList
.Select(x => new MyArray[]
{
   ArrayPar1 = x.ListPar1,
}).ToArray()

I have a secondary List that i would like to add to the same array inline in the initialiser, something like this ():

    MyArray[] Arrayitems = SomeOtherList
    .Select(x => new MyArray[]
    {
       ArrayPar1 = x.ListPar1,
    }).ToArray()
   .Join(
    MyArray[] Arrayitems = SomeOtherListNo2
    .Select(x => new MyArray[]
    {
       ArrayPar1 = x.ListPar1,
    }).ToArray()
   );

Is this possible or will i have to combine everything before the initial select statement?

Do you mean new MyArray()? new MyArray[] does not make sense with your given initializer and result type. — Sefe
– Sefe, Commented Feb 14, 2017 at 9:35
Thanks Sefe, you're right but it's just an psuedo example, the actual code would have just 'Arrayitems' that is initialised elsewhere. You other answer is exactly what i need, thanks. — Dan Hall
– Dan Hall, Commented Feb 14, 2017 at 9:58

Sefe · Accepted Answer · 2017-02-14 12:51:47Z

6

You can use Concat:

MyArray[] Arrayitems = SomeOtherList.Concat(SomeOtherListNo2)
.Select(x => new MyArray()
{
   ArrayPar1 = x.ListPar1,
}).ToArray();

If items could be contained in both lists and you want them only once in your result, you can use Union:

MyArray[] Arrayitems = SomeOtherList.Union(SomeOtherListNo2)
.Select(x => new MyArray()
{
   ArrayPar1 = x.ListPar1,
}).ToArray();

edited Feb 14, 2017 at 12:51

answered Feb 14, 2017 at 9:34

Sefe

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