nested array initializer is expected c#

Question

I have to build a jagged array of 2D arrays but I get the error "A nested array initializer is expected". My code is similar to this:

double[,] a1 = new double[,] { { 1 } };
double[,] a2 = new double[,] { { 2 } };
double[,] a3 = new double[,] { { 3 } };
double[,][] b = new double[,][] { a1, a2, a3 };

Why do I get that error? How can I solve the problem?

Servy · Accepted Answer · 2019-05-02 22:07:40Z

2

A single dimensional array of two dimensional arrays of doubles is a double[][,], not a double[,][]. With your current type it's expecting a two dimensional array of single dimensional arrays of doubles, which isn't what you're providing.

This is exactly why you shouldn't use a type like this. You probably want to have a custom type that composes a two dimensional array, and have a single array of that custom type. It'll be far easier to work with that without confusing yourself.

answered May 2, 2019 at 22:07

Servy

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