Convert array to double pointer [duplicate]

Question

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Converting from a jagged array to double pointer in C#

I wanna convert array to pointer in c#.

double[] array;
//input something
fixed (double* pt = array) {
//.....

It successed. But I want to use it like this

How can I use double pointer?

double[][] array;
//...
fixed (double** pt = array) {
//...

when I convert it to double pointer, it doesn`t worked. How can I use double pointer?

(added) I already used "unsafe" at class like this

unsafe class Class1 {

and first example (using single pointer) was done well. I wanna use double pointer

I think this might be useful for you : stackoverflow.com/questions/890098/… — orel
– orel, Commented Mar 12, 2012 at 9:14
@juergen d, why can't be this C#? Yeah, it is unsafe code, but possible. — Chuck Norris
– Chuck Norris, Commented Mar 12, 2012 at 9:14
double[][] is a jagged array (as opposed to a multi-dim array double[,]) and hence, is not a contiguous memory location. So it does not make sense to create pointer out of it. You perhaps need to fix out each individual array within. — VinayC
– VinayC, Commented Mar 12, 2012 at 9:16

Community · Accepted Answer · 2017-05-23 10:27:04Z

0

Why not do?

foreach(var doubleValue in array) {...}

Its safe and simple. Idea lifted from here.

If the array is jagged then perhaps a SelectMany would provide simple iteration.

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answered Mar 12, 2012 at 9:20

Jodrell

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