say please, VB.net

what use the cycle For Each-> Next->Exit For element DataTree?
Possible all data to translate in Collection or Dictionary?

example

Dim thisCollection As New Collection

For Each thisObject As String In thisCollection

    If thisObject = "Hello" Then

        found = True

        Exit For

    End If

Next thisObject

▶ Reply to This

Replies to This Discussion

Permalink Reply by MaMa on September 7, 2010 at 9:28am

the operation of assigning the string "Hello" to thisObject is always true in your case. You should use string.compare(thisObject, "Hello") instead.

----------------------
EDIT: David sez: no, it won't assign. It will compare for equality. But you should use String.Compare as it allows you to specify the culture. I always use Ordinal or OrdinalIgnoreCase depending on what I need.

▶ Reply

Permalink Reply by David Rutten on September 7, 2010 at 10:31am

Hi Yurii,

you can use AllData() to get a list containing shallow copies of all the data items in the tree. There is no Iterator defined for GH_DataTree(Of T) that you can use to foreach your way through the data.

I also strongly advice you to not use classes like Collection or ArrayList. Since .NET 2.0 we have access to Generic classes such as List(Of T), which is to be preferred. Collection and ArrayList are legacy types from .NET 1.0 and should no longer be used.

--
David Rutten
david@mcneel.com
Poprad, Slovakia