Simple Array Question

[mateobus]

I have seen this tactic used often in javascript, and it won't work in C#. Can someone explain why its not working as intended, i think the code should be self explanitory

MyObject[] objects= new MyObject[2];
int objIndex = 0;
objects[objIndex] = new MyObject();
objects[objIndex].someAttribute = "attr value";
objects[(objIndex++)] = new MyObject();
//Error occurs below that object hasn't been instantiated
objects[objIndex].someAttribute = "other attr value";

I am getting an error that the object at index 1 has not been instantiated. Basically, it is creating a new object at index 0, then incrementing the variable, and i want it to do the incrementing first. Is there a way to do this on one line?

Thanks in advance.

 

[mateobus]

In case anyone wants to know, this works:

MyObject[] objects= new MyObject[2];
int objIndex = 0;
objects[objIndex] = new MyObject();
objects[objIndex].someAttribute = "attr value";
objects[++objIndex] = new MyObject();
//Error occurs below that object hasn't been instantiated
objects[objIndex].someAttribute = "other attr value";

++ before the var name makes sure that happens first.

 

[TipGiver]

Yes, var++, ++var and same with -- is basic knowledge of Ansi C/C++.
Your code is not very clear for me. I would change it like below. Notice that the objIndex++ action happens at the very last command of each object. So, at the last line the index will remain the same (because of the post increment) and the 'new MyObject();' will be saved at the next array location (the objIndex in now incremented by the previous ++).

MyObject[] objects= new MyObject[2];
int objIndex = 0;

objects[objIndex] = new MyObject();
objects[objIndex++].someAttribute = "attr value";

objects[objIndex] = new MyObject();
objects[objIndex++].someAttribute = "other attr value";