I'm curious in how to best structure code that checks for membership of an instance of an ADT in a set of elements without using pattern matching.
Given the following ADT, methods and functions, which would be seen as the idiomatic way to check for membership in Scala?
sealed trait Code {
def...
I'm using PHP, I have a class that generates an id based on the calling class, so the id of the class won't change after it has been initialised, now I'm wondering which of my two methods is preferrable.
Set the id in the constructor
Generate the id when asked for
/* Set the id in the construc...
I am working on a python app and I want my app architecture to be intuitive. I consider that in an app, there is multiple page and in each page, there is multiple element.
So I created a big dictionnary containing all the key and this is used by multiple modules.
I want this dictionnary to be a r...
While working on the following leetcode problem: https://leetcode.com/problems/top-k-frequent-elements/ I used a Priority Queu implementation in Ruby. I have learned how to implement a Priority Queu in Java in Robert Sedgewick's Algorithms book. When inserting Hashes into the Priority Queue for ...
I need to know whether I have implemented Strategy pattern correctly for below 3 classes provided to me for 2 tasks.1) Report Generation 2) Movie Type.
Below 3 classes were provided to me
Rental.java
Movie.java
Customer.java
public class Rental {
private Movie _movie;
private int _daysRented;
...
I have written a selection sort code in java. I know its very elementary algorithm, but since i am learning, so wanted your input about the quality of the code. Please have a look at the code:
package selection_sort;
import java.util.Scanner;
public class SelectionSort {
int [] arrayToBeSorted;...
I've a standard enum and flags enum maker using Proxy for in operator. Enum instances are objects wrapping a number. (In an ideal scripting language they'd be primitive classes, but I got what I want anyway.)
The example below works as follows:
Associates:
E.CONST_0 with 'const0' and 0
E.CONST_...
I have a piece of code that tries to speed up the expensive process of populating a large, multidimensional array of double coefficients.
For full context, the remainder of the code is available here, however I believe i've included all relevant parts.
state_type::num_atoms() and state_type::P_si...
I want to test my CRUD operation to a MySql database (I use dapper as my ORM).
This is what I wrote with xUnit:
private IPaymentRepository paymentRepository;
private Payment testPayment;
private string connectionString = "Database=..."; //Test DB
public PaymentRepositoryTest()
...
I have a Python 3.6.8 script that does the following:
Takes the unique values in a column in a spatial table.
Creates map queries/layers for each unique value.
Each query/layer has a where clause that isolates the unique values.
The script uses a proprietary/OOB Python site package called Arc...
I'm running a program on a school server and I'm getting a memory limit exceeded error because the program allegedely takes more than 300 MiB of memory. Here is the program:
#include <stdio.h>
char a[3010][3010];
int degree[3010][3010];
bool visited[3010][3010];
int h, w;
void searchSame(int x,...
One of my team mates declared a boolean variable name like,
var isSupportDataType = true
In code review, I suggested to change it into willSupportDataType or doesSupportDataType. But he does not agree on that. I was trying to convince him that boolean variable should be in participle or continu...
I have a "Palindrome" class that has some functions for verifying if certain things are Palindromes. For the verification, I have 2 different algorithms, one being recursive and the other iterative.
I'm happy with the algorithms however I'm unsure whether the way that I do the overloading and eve...
In my quadratic sieve implementation, the sieving part takes 40% of the overall performances, I wonder if you could think of a way to improve it.
// that loop takes 40% of the performance
for (Wheel wheel : wheels) {
wheel.update(logs);
}
// Wheel update method
public void update(byte[] log...
I'm looking for someone to really tear apart the following code I wrote for my graduate-level algorithms class. The problem was Optimal Caching, and the algorithm I'm implementing is called "Farthest in Future", which looks to see which cache item is either NOT in the request, or one who's first ...
I built an backend using Django and the django-rest-framework and realized that a lot of the code snippets (mainly classes) are similar. Is there any better way? I tried to wrap them into a very generic class, but didn't succeed yet. This is what I mean by "similar serializers":
...
class DeviceS...
