2d array

Ruby IronRuby
#1

I have some C# code which is expecting a 2d array.

public static class Foo
{
public static int Bar(object[,] inArray)
{ … }
}

Is there any way that I can call this from IronRuby? I can’t figure out
how
to create the 2d array?

I have a feeling this has been asked before, but I can’t find any info
about
it…

Cheers, Orion

#2

You can create an array using the BCL by calling Array.CreateInstance.
From C#, it would look like this:

Array.CreateInstance(typeof(object), 5, 6)); // Equivalent to new
object[5,6]

I don’t have IronRuby on this machine and don’t want to guess at the
right syntax.

From: [email protected]
[mailto:[email protected]] On Behalf Of Orion E.
Sent: Sunday, November 29, 2009 4:41 PM
To: [email protected]
Subject: [Ironruby-core] 2d array

I have some C# code which is expecting a 2d array.

public static class Foo
{
public static int Bar(object[,] inArray)
{ … }
}

Is there any way that I can call this from IronRuby? I can’t figure out
how to create the 2d array?

I have a feeling this has been asked before, but I can’t find any info
about it…

Cheers, Orion

#3

This worked for me:

System::Array.CreateInstance(System::Object.to_clr_type, 5, 6)

Getting and setting works using x[1,2] as you’d expect

Cheers!

#4

… And here’s a convenient helper

class Array
def to_2d_a(ruby_type)
sub_count = self.length
max_sub_len = self.map{ |a| a.length }.max

ar = System::Array.CreateInstance(ruby_type.to_clr_type, sub_count,

max_sub_len)

self.each_with_index do |sub, idx|
  sub.each_with_index do |item, sub_idx|
    ar[idx, sub_idx] = item
  end
end

ar

end

used like this

[[1,2],[3,4,5],[6,7]].to_2d_a(System::Int32)

:slight_smile: