Is there a way to convert the List<T[]> to an array of the same type T[]?
For example: List<class1[]> to Class[]1 ?
I know we can convert List<T> to array T[] using list.Toarray() but here I'm looking for
List<T[]> to array T[].
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3I'm guessing Java, but maybe another language? Please tag this question with the language you are using.chiliNUT– chiliNUT2015-01-15 06:14:37 +00:00Commented Jan 15, 2015 at 6:14
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1Why do you need this for both C# and Java?Thilo– Thilo2015-01-15 06:23:12 +00:00Commented Jan 15, 2015 at 6:23
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1So you want to flatten the list?Thilo– Thilo2015-01-15 06:24:15 +00:00Commented Jan 15, 2015 at 6:24
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1I need it only for C#, someone added the tag for javaUser– User2015-01-15 06:29:48 +00:00Commented Jan 15, 2015 at 6:29
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2 Answers
You appear to be turning a List of Lists into one flat list.
If you are in C#, there are Linq utility functions for this:
// Namespaces you need
using System.Linq;
using System.Collections.Generic;
////////////////////////////////////////////
// In your code block //
////////////////////////////////////////////
List<T[]> myJaggedList = new List<T[]>();
// (Populate here)
T[] flatArray = myJaggedList.SelectMany(m => m).ToArray();
2 Comments
User
Hi, I don't see SelectMany method from list object
Andrew Shepherd
@User - You have to include System.Linq as a namespace. I'll update my answer.
The Java Class List contains a function List.toArray(). Here is the Documentation.
Edit: There is a generic List.toArray() as well <T> T[] toArray(T[] a) see the same documentation from above.
1 Comment
default locale
Maybe you're right, but it seems to me OP has a slightly different question: how to create an array (not an array of arrays) from the list of arrays
