I'm pretty new to programming, but I have a pretty extensive background in math. Because of this, I decided one of my first programs (in C#) would estimate derivatives. This program does just that, and it only does so for the function $x^2$. Here's the main part of the code:
Console.WriteLine("...
The question can be found here https://leetcode.com/problems/letter-case-permutation
Given a string S, we can transform every letter individually to be
lowercase or uppercase to create another string. Return a list of all
possible strings we could create.
My question pertains mostly to...
I have a dataframe like this:
Date Query
29-03-2019 SELECT * FROM tableN WHERE ..
30-03-2019 SELECT * FROM ... JOIN ... ON ...WHERE ..
.... ....
20-05-2019 SELECT ...
And I want to apply two functions (say that my functions are getTable and getCol) to that dataframe to ge...
I am new to python, I found different codes that implements trie, like this one for example:
from collections import defaultdict
class TrieNode:
def __init__(self):
self.children = defaultdict(TrieNode)
self.isEnd = False
def insert(self, word):
node = self
...
Recently I got test task at the project, it is fairly simple:
const _ = require('underscore');
// Challenge:
//
// Write a function that accepts as argument a "function of one variable", and returns a new
// function. The returned function should invoke the original parameter function on every...
I have solved an assignment (Exercise 3) from MOOC Course Object-Oriented Programming with Java, part II, but I'm not enrolled in said course.
Question: How do you refactor this code so that it follows OOP, reads better, is manageable? How can I write method names and classes better? How do you ...
I need to read a remote file using FTP and process it and insert the processed data to a PostgreSQL database in another server.
The below code is working fine, but i want some advice to modify few things.
In this line i don't want to write the actual details,i want that to
be hidden from my sc...
Double Pendulum
I made a little application that embeds a matplotlib dynamic plot into tkinter that enables control through the tkinter GUI. Code is in Github. It also uses numpy and scipy to solve the ordinary differential equations for a double pendulum.
To change the initial theta's just dra...
I have ported Stempel stemmer in Java (Apache Lucene) to Python. I also come from Java world so my translation might not be "pythonic" enough.
I would like to hear your feedback on quite representative part of the code, translation of Diff class that applies stemming command (diff) to a string ...
I have a simple question about how I should be ordering the elements in a boolean expression. Imagine I have an equality operation, should the expected value be in front or the actual value?
if (expectedValue == actualValue) { /* ... */ }
// or
if (actualValue == expectedValue) { /* ... */ }
Python program to check the validity of password input by users using re module. Following are the criteria for checking the password:
At least 1 letter between [a-z]
At least 1 number between [0-9]
At least 1 letter between [A-Z]
At least 1 character from [$#@]
Minimum length of transaction pa...
Context
On StackOverflow, a user ask:
How to make last element of list finish with a dot and the others with a comma?
# list that may vary
errors_list = ['It has no letters', 'It has symbols', 'The last letter is a space']
for i in errors_list:
print(" " + str(errors_list.index(i) ...
This question is more to see if I can get some input on the "design pattern" I tried to implement here. I'm just learning about closure in JavaScript and I think I'm starting to get it. I'm wondering if the way I wrote this code is of a good quality - something you'd expect to see in production c...
This is the code I came up with:
void set_bit_at_pos(int* num, int pos, bool val)
{
if (val) {
int mask = 1 << pos;
*num |= mask;
}
else {
int mask = ~(1 << pos);
*num &= mask;
}
}
I'm new to bitwise operations, so this approach may not be the b...
A non-empty array A consisting of N integers is given. The array contains an odd number of elements, and each element of the array can be paired with another element that has the same value, except for one element that is left unpaired.
For example, in array A such that:
A[0] = 9 A[...
Link To Question
Given a string, return a version without the first and last char, so
"Hello" yields "ell". The string length will be at least 2.
without_end('Hello') → 'ell'
without_end('java') → 'av'
without_end('coding') → 'odin'
This is the code I wrote as a solution to...
I have Gig and Singer models with a many-to-many relationship. My form sends a given gig id and all the singers who will be attending, denoted with check boxes. I need to have the ability to check or uncheck singers. The following code works, but it does so by removing all the singers from a g...
How would i use a high order component to prevent the same or similar logic, im looking for a more complex way of using a high order component. I read some of the basic examples.
This is some existing logic that do multiple functions. This app is like an instagram.
For example i have a Sign up...
This is my first react app and it was for a job interview challenge. The app is really simple and it works, but although I don't think I'm gonna get it, could I have some feedback about what is wrong and how could I improve it?
***I already submitted this, so is not cheating, I just need to know...
This is a simple implementation of Django's sample project "Poll" using and express.
The controller code:
export default class AuthController {
private db: AuthDb;
constructor(db: AuthDb) {
this.db = db;
}
login = async (user: User) => {
try {
userV...
