I've implemented a simple Maybe type around std::function that implements function composition where any function in the composition can fail (causing the entire composition to fail) - in essence, a Maybe monad where operator<< implements bind.
For example,
// one binary function that cannot fa...
I'm just trying to build a quick and crude error messaging system. It currently looks like this:
#include <exception>
#include <fstream>
#include <iostream>
#include <string>
#include <sstream>
#include <map>
enum MsgTy {
OK = 0,
WARNING,
ERROR,
CRITICAL,
};
class FileWriter {
...
The code below shows the class definition for a stack with no race conditions in the interface and that implements options 1 and 3: there are two overloads of pop(), one that takes a reference to a location in which to store the value and one that returns a std::shared_ ptr<>. It has a simple int...
I've created a fake WeakReference class for VBA by chance. A Weak Reference is not counted (i.e. IUnknown::AddRef method is not called). I knew about the Weak Reference concept from Swift and I accidentaly read about a COM Variant.
In short, I am using a Variant (ByRef) to manipulate the first 2 ...
I have tried to use a basic if else logic but it seems it is not working as expected.
outcome = "heart attack"
if (outcome == "heart attack") {
colnum <- 11
}
else if (outcome == "heart failure") {
colnum <- 17
}
##else {colnum <- 23}
x <- coln...
I am creating an \$O(n)\$ solver for an \$Ax = b\$ system where \$A\$ has the form
\$
A = \begin{pmatrix}
a_1 & b_1 &&&d_{u}\\ c_1 & a_2 & b_2\\& \ddots & \ddots & \ddots\\& & c_{n-2}&a_{n-1}& b_{n-1}\\ d_{l} &&&c_{n-1}& a_{n}
\end{pmatrix}
\$
To do this, I wrote a basic functio...
My first attempt at a sudoku solver using the backtrack algorithm.
# Functions for solving Sudoku puzzles of any size
# NumPy makes it easier to work with 2D arrays
import numpy as np
def find_empty_cells(board):
"""Traverse the board and return a tuple of positions of empty cells"""
r...
Hi I'm trying to create a c++ code based node editor (GUI versions to be implemented). Here is how it works, each node has ports which can be of INPUT or OUTPUT (they only connect with each other so INPUT->OUTPUT or OUTPUT->INPUT).
Here is the code so far
main.cpp:
#include <iostream>
#include "a...
Here is a programming task " Write a program with a function that converts a string of digits into an integer value. Do not use the strtol() function or any other standard C library function. Write your own!"
now I did this program wish is work perfectly with no errors. so first I did the power f...
I've been working on the first Project Euler problem and couldn't figure it out:
If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. > The sum of these multiples is 23. Find the sum of all the multiples of 3 or 5 below 1000.
After some research online...
