Firebase (....ContinueWith(task => ...) in a For-Loop - firebase

Question

First, this is the code:
for (int j = 1; j <= count; j++)
{
db.Child("Some Child").GetValueAsync().ContinueWith(task =>
{
Debug.Log("j: " + j); // Here the Debug will show me that j = count
if (task.IsFaulted)
{
// ERROR HANDLER
}
else if (task.IsCompleted)
{
// Some Code Here
}
});
}
Ok, so my problem is that after the "....ContinueWith(task => ..." ' j ' will become directly equal to the count variable. Why this happens and how to solve it? Or is there another method to do that?

Answer 1

Ok, so my problem is that after the "....ContinueWith(task => ..." ' j
' will become directly equal to the count variable. Why this happens
and how to solve it?
That's because you used <= instead of <. With <=, j must be equals to count for the loop condition to be met and finish. If you want j to be less than count then use count-1 or simply use <.
So, that should be
for (int j = 1; i <= count-1; j++)
Or
for (int j = 1; i < count; j++)
Note that array starts from 0 not 1 so int j = 1; should be int j = 0; but I have a feeling that's what you wanted to do and you are starting the loop from 1 on purpose.
Finally, another problem is your variable being captured in a loop because you are using lambda in the ContinueWith function. See this post for more information. To use the j variable inside the ContinueWith lambda function, make a copy of it then use that copy instead of the j variable.
db.Child("Some Child").GetValueAsync().ContinueWith(task =>
{
//MAKE A COPY OF IT
int jCopy = j;
Debug.Log("j: " + jCopy); // Here the Debug will show me that j = count
}
Complete fixed code:
for (int j = 1; i < count; j++)
{
db.Child("Some Child").GetValueAsync().ContinueWith(task =>
{
//MAKE A COPY OF IT
int jCopy = j;
Debug.Log("j: " + jCopy);
if (task.IsFaulted)
{
// ERROR HANDLER
}
else if (task.IsCompleted)
{
// Some Code Here
}
});
}