How to efficiently resize an array of values, without boxing, used within a Dictionary<string, float[]>
- by makerofthings7
In the code below, Pages is defined as
public SortedDictionary<DateTime, float[]> Pages { get; set; }
I am trying to dynamically increase the size of this array. Can anyone tell how to increase the sized of the innermost float[]?
var tt = currentContainer.Pages[dateTime];
Array.Resize<float>(ref tt, currentContainer.Pages.Count + 1);
Fail 1
I tried the following code and get index out of range exception
SortedDictionary<DateTime, float[]> Pages = new SortedDictionary<DateTime,float[]>();
float[] xx = new float[1];
xx[0] = 1;
DateTime tempTime = DateTime.UtcNow;
Pages.Add(tempTime, xx);
var tt = Pages[tempTime];
Array.Resize<float>(ref tt, Pages.Count + 1);
Pages[tempTime][1] = 2;
Fail 2
The following gives a compile time error (property, index, or dynamic member can't be used as a ref value)
SortedDictionary<DateTime, float[]> Pages = new SortedDictionary<DateTime,float[]>();
float[] xx = new float[1];
xx[0] = 1;
DateTime tempTime = DateTime.UtcNow;
Pages.Add(tempTime, xx);
var tt = Pages[tempTime];
// The line below is different from Fail 1 above ... compile time error
Array.Resize<float>(ref Pages[tempTime], Pages.Count + 1);
Pages[tempTime][1] = 2;
Question
What is the most performant answer to resize this array?
Would the answer change if it's likely that the final size will be 100-200 floats or 700-900 floats?
What if I change my allocation size from +1 to +128? .. or larger?
