Physics queries (2D): NonAlloc#

//  Incorrect, the return value is never read.
Physics2D.CircleCast(origin, radius, direction, filter, results);
foreach (RaycastHit2D hit in results)
{
    // ...    
}

//  Correct, the return value is used in a for loop.
int hitCount = Physics2D.CircleCast(origin, radius, direction, filter, results);
for (int i = 0; i < hitCount; i++)
{
    RaycastHit2D hit = results[i];
    // ...    
}