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...

range() with a 'forbidden' value??

Let's have an example. I have an ordinary function like this: def function(x): for b in range(0, 5): pr...

error in c code: expected identifier or '(' before '{' token?

Program brief overview (3 body problem): #include <stdlib.h> #include <stdio.h> #include <math.h>...

How to return a boolean method in java??

I need help on how to return a boolean method in java. This is the sample code: public boolean verifyPwd(){ ...

Functions and parameters in python 2.7.3?

In my Computer Science class, I am just starting to learn about Functions and parameters in python. Right now my in...

Cannot read property 'addEventListener' of null?

I have to use vanilla JavaScript for a project. I have a few functions, one of which is a button that opens a menu....

Is there a function in c that will return the index of a char in a char array??

Is there a function in c that will return the index of a char in a char array? For example something like: char va...

Getting error: ISO C++ forbids declaration of with no type?

I'm getting the following errors: ISO C++ forbids declaration of ttTreeInsert with no type ISO C++ forbids declarat...

Multiplication function with recursion in Python?

I need to write the function mult( n, m ) that should output the product of the two integers n and m. I am limited t...