Array sizing

[=?Utf-8?B?TmVpbCBC?=]

In C++ arrays have the .SetAtGrow() method that expands the array to
accommodate the index specified. I don't find an equivalent method in C#.

Is there one??

If not, what is the recommended way to handle this??
Currently I'm using the Resize(....) method but this can be awkward at times.

Thanks, Neil

[Ignacio Machin ( .NET/ C# MVP )]

Re: Array sizing

On Mar 28, 4:06 pm, Neil B <Ne...@discussi ons.microsoft.c omwrote:

In C++ arrays have the .SetAtGrow() method that expands the array to
accommodate the index specified. I don't find an equivalent method in C#.
>
Is there one??

No

If not, what is the recommended way to handle this??
Currently I'm using the Resize(....) method but this can be awkward at times.

>
Thanks, Neil

Use a List<Tcollectio n.

[Jeroen Mostert]

Re: Array sizing

Jeroen Mostert wrote:

public static void SetAtGrow<T>(th is List<Tlist, int index, T item) {
if (list.Count index) return;
if (list.Capacity < index) list.Capacity = index;
list.AddRange(F orever(default( T)).Take(index - list.Count));
list.Add(item);
}
>

Heh. That's what you get for modifying your code halfway through. The
obvious fix:

public static void SetAtGrow<T>(th is List<Tlist, int index, T newElement) {
if (index < list.Count) {
list[index] = newElement;
return;
}
if (list.Capacity < index) list.Capacity = index;
list.AddRange(F orever(default( T)).Take(index - list.Count));
list.Add(newEle ment);
}

--
J.

[Jeroen Mostert]

Re: Array sizing

Jeroen Mostert wrote:

Jeroen Mostert wrote:

> public static void SetAtGrow<T>(th is List<Tlist, int index, T item) {
> if (list.Count index) return;
> if (list.Capacity < index) list.Capacity = index;
> list.AddRange(F orever(default( T)).Take(index - list.Count));
> list.Add(item);
> }
>>

Heh. That's what you get for modifying your code halfway through. The
obvious fix:
>
public static void SetAtGrow<T>(th is List<Tlist, int index, T
newElement) {
if (index < list.Count) {
list[index] = newElement;
return;
}
if (list.Capacity < index) list.Capacity = index;
list.AddRange(F orever(default( T)).Take(index - list.Count));
list.Add(newEle ment);
}
>

*sigh* The above code still contains one more bug, but this one is left as
an exercise to the reader, as I obviously need some refreshments.

--
J.