Swift - Take Nil as Argument in Generic Function with Optional Argument?

I am trying to create a generic function that can take an optional argument. Here's what I have so far: func someth...

write a pandas/python function which requires as inputs multiple columns in a pandas dataframe?

In a dataframe with two columns I can easily create a third without a function if it is a numerical operation such a...

Function returns a wrong number??

Can anybody help me with this? It gives me a wrong number. matrix[i][j].spath is filled with the correct values but ...

Why do we need to support the function isFull() in a queue or stack??

Why do we need to support the function isFull() in a queue or stack? We can store data on disk and load whatever si...