retrieve array from rectangular array

[stormbind]

Hi,

string[,] a = new string[3,2];
string[] b = a[0]; // error, wrong number of indices (expects 2)

I don't want to retrieve the separate values.

I want to retrieve the arrays. How do you retrieve the first array (b) from the rectangular array (a)?

--Glen

Memoria mihi benigna erit qui eam perscribam

 

[jmeckley]

something like

var x = new string[2,3];
var y = new string[3];

y[0] = x[0,0];
y[1] = x[0,1];
y[2] = x[0,2];

x is a matrix, not a key value pair, which is what it sounds like you want. for that you would use a dictionary

var Dictionary<int, string[]> x= new Dictionary<object, string[]>
{
   {1, new string[3]},
   {2, new string[3]},
   {3, new string[3]},
}
var y = x[1];

Jason Meckley
Programmer
Specialty Bakers, Inc.

faq855-7190
faq732-7259

 

[stormbind]

Well, I want to retrieve a row/array from a matrix

I went with jagged array [j] to get the task done but would have felt better to use the rectangular [i,j] notation.

The example you gave would retrieve cells/values rather than rows.

Thanks,

--Glen

Memoria mihi benigna erit qui eam perscribam

 

[jmeckley]

I'm curious, why create such low level structures to begin with? Why not create an object which explicitly reflects it' purpose? For example:

var people = new object[2,3];
people[0, 0] = "Jason";
people[0, 1] = 30;
people[0, 2] = Sex.Male;
people[1, 0] = "Lindsey";
people[1, 1] = 29;
people[1, 2] = Sex.Female;

is very difficult to understand. on the other hand

class Person
{
   public string Name {get;set;}
   public int Age {get;set;}
   public Sex Gender {get;set;}
}
var people = new [] {
        new Person {
              Name = "Jason",
              Age = 30,
              Gender = Sex.Male,
           },
        new Person {
              Name = "Lindsey",
              Age = 29,
              Gender = Sex.Female,
           },
      }

expresses the intent in explicit terms. i can easily see what is happening.

Jason Meckley
Programmer
Specialty Bakers, Inc.

faq855-7190
faq732-7259