I pass data from one third-party lib to another one.
Given an object[,] with lower bounds {0,0}, I need to make object[,] with lower bounds {1,1}.
Is there a way to perform this convertion without creating new array and copying all the data?
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1 Answer
Is there a way to perform this convertion without creating new array and copying all the data?
No. You can't change the size or bounds of an array once it has been created.
7 Comments
BRAHIM Kamel
what about the array.resize under the hood is creating a new array no ?
Jon Skeet
@K.B: Yes, that creates a new array and copies the data - it doesn't modify the existing array object.
Heinzi
@K.B. Quote from the documentation of Array.Resize:
This method allocates a new array with the specified size, copies elements from the old array to the new one, and then replaces the old array with the new one. array must be a one-dimensional array. BRAHIM Kamel
@Heinzi thanks I have decompiled it and it's look like this
BRAHIM Kamel
public static void Resize<T>(ref T[] array, int newSize) { if (newSize < 0) throw new ArgumentOutOfRangeException("newSize", Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum")); T[] objArray1 = array; if (objArray1 == null) { array = new T[newSize]; } else { if (objArray1.Length == newSize) return; T[] objArray2 = new T[newSize]; Array.Copy((Array) objArray1, 0, (Array) objArray2, 0, objArray1.Length > newSize ? newSize : objArray1.Length); array = objArray2; } }
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