I am a beginner in Java programming, and I created a calculator as my first Java project. Therefore, can you review my code and provide feedbacks/ tips?
import java.util.Scanner;
public class Calculator {
public static void main(String[] args) {
double firstnum, secondnum, answer1,...
I solve this problem in Swift. Looking for feedback on my code or a better solution:
import Foundation
// parses line to return array of numbers in string format
func readIntegers() -> [String] {
return readLine()!.componentsSeparatedByString(" ").map { $0 }
}
// left rotates the array b...
Given a set, generate all permutations.
eg. (permutations #{1 4 5}) => ((5 4 1) (4 5 1) (5 1 4) (1 5 4) (4 1 5) (1 4 5))
Here's what I cobbled together:
(defn perm-r [allPerms currentPerm input i]
(cond
(empty? input) (conj allPerms currentPerm)
(< i 0) allPerms
:else (perm-r
...
Here's an odd pattern I found for sieving out composite numbers to find primes. I wrote it myself, originally thinking I made an indexing error, but it turned out to work after removing squares.
import bitarray
def sieve(n):
"""bitarray sieve"""
b=bitarray.bitarray([1]*(n+1))
x=int(n...
Good Day! I made a function that contains the database connection and query. Now im always calling this function everytime I need to query a database. it is good or is there another way better?
Database Connection:
/* Database Configuration */
DEFINE( "DATABASE_HOST", "" );
DEFINE( "DATABAS...
There is an Employee table with data like:
ID FIRST_NAME END_DATE CITY
23 Manoj 24-JUL-16 08.45.02.000000 AM Bangalore
22 Abhishek 24-JUL-16 08.45.01.000000 AM Bangalore
24 Nilu 24-JUL-16 08.46.01.000000 AM Bangalore
25 Niroj ...
As suggested by @Dannnno on my original post, I am posting my partially rewritten getaddrinfo() (and now addrinfo) wrapper for merciless review. I've made quite a few changes to the code as suggested originally, and included a minimal example of main() to show how it comes together.
Some things ...
I am trying to define an array of characters and shuffle their values so that each run provides a different shuffled output from the given array.
For example,
int main()
{
char arr1[10] = { '1', '2', '3', '4', '5', '6', '7', '8', '9', '\0' };
cout << randarr1;
return 0;
}
Having i...
I am looking for making my code faster. I am working on yoochoose recsys 2015 dataset.. and trying to perform some transformations.. [recsys2015], it has got 30 million plus rows of data. The goal of my code is to extract time duration in the session with the help of python, and the day , hour se...
To avoid the overridable method call in constructor dilemma this approache delegate the variables initialization and calls to overridable methods to a member method that return reference to the instance its self and exception to be thrown if trying to use instance without invoking the initializat...
I am from Java and I am try to create a process pool in Erlang.
like the Java API, ThreadPoolExecutor(int corePoolSize, int maximumPoolSize, long keepAliveTime, TimeUnit unit, BlockingQueue<Runnable> workQueue, RejectedExecutionHandler handler)
with this API, I can define core threads, time to ...
Do you guys see some problem or drawback about using an extension function such as this?
<Extension()> Function Value(Of T)(ByVal cell As DataGridViewCell, Optional ByVal defaultvalue As T = Nothing) As T
If TypeOf cell.Value Is T Then
Return cell.Value
Else
Try
...
Can someone please review my code? Is it correct implementationof queue ? if not please give suggestion how to implement it using linkedlist.
class Queue
{
Node front,rear;
class Node
{
int data;
Node next;
public Node(int d)
{
data=d;
next=null;
}
}
void e...
Game Of Life in Java:
Currently I am only doing one generation.
I'd Like a review on my code.
Thanks in advance.
Game of Life: The universe of the Game of Life is an infinite
two-dimensional orthogonal grid of square cells, each of which is in
one of two possible states, live or dead. E...
i have wrote a simple twitter keyword search parser.
can i get some code review please?
i have a bug that sometimes appears and sometimes not, related to the list index, probably something to do with the [index-1] thing
import requests
from bs4 import BeautifulSoup
url_start = "https://twitter...
I have to implement a waiting room management system in an emergency ward of a hospital.This is done using queue.I am entering names of the patients..and an ID will be given to them randomly..lets say the first patient will have ID-1.
The ShowAllPatient() method is supposed to sort the names of p...
The Good
The code uses library functions such as argp_parse() so it's obvious
you're not trying to reinvent the wheel. Some of the functions already follow SRP as noted below.
Reduce Function Complexity
The Single Responsibilty Principle (SRP) is a good thing to keep in mind. This
website provid...
I have implemented a kind of thing that do kind of event triggering in golang. This is Open Sourced at here. github.com/sadlil/go-trigger. Experts review and suggestions will be gladly appreciated.
I have this following code written in Excel VBA. When I compile it, there are no syntax errors but nothing gets printed out in Excel.
The first few lines of the text file are (past the series of lines):
|||||||||||||||||||||||||
date Tue Jun 21 03:49:12.639 pm 2016
base hex timestamps abso...
I am using a census API module from CitySDK. I am getting an error in my javascript console. When I load the page the, no data is there. I am attempting to pull the data and display it on a webpage.
<!DOCTYPE html>
<html>
<head>
<title>Opportunity Project #1</title>
<script sr...
I needed a web weather for a app that talks to ForecastIO API. Basically that senta request to https://api.forecast.io/forecast/APIKEY/LATITUDE,LONGITUDE that gives me back a JSON with weather data that I can add to my view.
So I made my logic in the server (Node.js) with:
a class to manage th...
Following this website I wrote a neural network which uses the MNIST training data to recognize digits. The author writes that it should take a couple of minutes to train the network with 30 epochs of training. My network needs something like 5 minutes alone for 1 epoch of training.
Why is my...
I'm making my first foray into rust. I wanted to copy a fun and non utilitarian tool so I chose CowSay. It's not feature complete (CowSay has a lot of options) but it's a start.
My primary reasons for asking here are:
Is to get better at idiomatic rust (this is the first thing I've written in ...
I have a database connection PHP file which has a lot of queries to the database. Here are 3 of the functions that I am using:
public function deleteAccount($token)
{
$sql1 =
"DELETE FROM $this->table_user
WHERE $this->key_token = ?;";
$stmt1 = $this->connection->prepar...
Challenge
Write a program which reads a file containing Morse Code and outputs the conversion.
Specifications
The first argument is a path to a file.
The file contains multiple lines.
Each line is a string of Morse code.
Each letter is separated by a space.
Each word is separated by two ...I am hoping I can get some guidance on some better "best practice" suggestions on how to handle this kind of code set. I understand that parameterized queries are a thing, but I am not quite there yet, but feel free to drop link to good tutorial on that if you must include that as part of your su...
