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I am working on Dijkstra algorithm and trying to find the shortest path for every source-destination (s-d) pair in a network. I have the below code which is working fine.
class Vertex implements Comparable<Vertex> {
public final String name;
public Edge[] adjacencies;
public double m...
Is this correct MYSQLI implementation?
IS it safe from injection?
IS the object cleanup done properly?
<?php
include_once '../../securelogin/db_connect.php';
include_once '../../securelogin/functions.php';
sec_session_start();
if (login_check($mysqli) == true)
{
$con = new mysqli("localho...0
There is a lot that can be improved in this code. First and foremost - please use longer, descriptive variable names - p doesn't really tell you anything. The only time I would say it is acceptable to use a single-letter variable name is the traditional i and c variables used like this:
for (i...
Here's a function I have to calculate the centroid of a polygon, based on this document:
import numpy as np
# a polygon approximating a circle with geometric centre at (37.5, 37.5)
testpoly = np.array(
[[ 50., 37.5 ],
[ 48.91931822, 42.58420804],
[ 45.86413258, 46.7893103...0
0
I am looking ways to improve the efficiency of my draw method in XNA/Monogame and understand how things work. I have just a group of 4 models (bricks), (red, green, blue, yellow) I am drawing multiple times on the screen (100-120 total models, so drawing each model 25-30 times) on the current fra...
Given the setup:
val myList = List(1)
val myList2 = List(2)
val moreList = List(3)
val moreList2 = List[Int]()
I am between two method signatures:
def do1(objs: List[List[Int]], message: List[Int] => String) =
objs.foreach{obj=>
println(message(obj))
obj.map(_.toString)
}
Or
de...7
This is a single class and dependency free1 unit test framework for Java. The only assertion available is assertTrue (this can be used for all test cases).
(Utilizes feature of Java7 : Multi catch)
What it does
Execute all methods with annotation Test. should fail if any arguments are needed...
I have a vote and a comment table. Now I want to display all comments and order them by votes-sum. Sum because some votes can have a higher value than others.
Therefore I want to display if the user has voted already on a comment. So I need to get that value too.
This is my actual query:
SELEC...
I'm wondering what can be done to optimize the following. I've tried to note the points at which most of the overhead is occurring. The main two points I see are
The call to DiffDays from within the LINQ query.
The ordering by DateTime LastOnline before putting results in memory.
Right now...
I see that you have grasped the concept of higher-order functions. To be more generalized, though, your repeat function should be able to handle n = 0 correctly too. That is, repeat(square, 0)(5) should return 5.
However, your solution is not written in the functional style, due to the use of ...
With the ANTLR-powered parser, I was able to reimplement all code inspections from the last release build, and more importantly to add a bunch more inspections.
Code inspections and quick-fixes are nice, but we want our Rubberduck even smarter than that. So I wrote one of the coolest things I'...
So I was listening to this keynote in RubyConf 2014, Enumerable for fun and profit.
There he mentions a problem of getting pairs of squares.
so on input a = [1,2,3,4,5]
we expect to get:
[ [1,1], [2,4], [3,9], [4,16], [5,25] ]
My instinct was to use a map:
a.map { |n| [n, n**2] }
While th...
I need to parse the following input string into a hash table with the following format:
input:
'1001=23;1001B=5;1002=0;1003=5;'
output:
=> {'1001'=>23,'1001B'=>5,'1002'=>0,'1003'=>5}
My solution:
def parser input
output = {}
input.split(';').map {|ar| ar.split('=')}.each {|id, c| outp...
-2
I need to create a database which stores details products, Manufactures,Suppliers. So initially I divided Products into categories and subcategories. Supplier table should contain supplier details and price they are offering.
I am not good database design. But managed to create the below one. Co...
0
def line_to(x: 0, y: 0, rect: nil)
unless rect.nil?
x, y, width, height = rect.x, rect.y, rect.width, rect.height
end
`#{@context}.lineTo(#{x}, #{y})`
end
def fill_rect(x: 0, y: 0, width: 0, height: 0, rect: nil)
unless rect.nil?
x, y, width, height = rect.x, rect.y, rect.width,...
0
0
I've got an Excel file from which I have to read out data to an object to serialize. So far I came up with this solution, I'm curious if there are any clearer solutions?
public myClassFromXsd excelToMyClassFromXsd(String excelFile)
{
Excel.Application excelApp = new E...
0
I decided to learn some more Haskell writing a Sudoku validator, the function checkSudoku outputs True if the Sudoku is valid and False if it is not. I did not write the checkSquares function because it would have been to hard. I am looking for any tip about Haskell and functional programming.
...
I might finally start to be getting a glimmer of a notion of how to use facelets! I'm just trying to work on the navigation, flow and organization for the sample "guess number" application. It seems as though it's possible to just create small composite component files in the includes directory...
Take a look at the following function:
std::vector<double> get_data(
std::vector<double> const &data,
double const t,
double const x)
{
std::vector<double> result(data.size(), 0.0);
double const
A = func(t, x),
B = func2(t, x);
std::transform(std::begin(...
Let a pair of distinct positive integers, (i, j), be considered "scrambled" if you can obtain j by reordering the digits of i. For example, (12345, 25341) is a scrambled pair, but (12345, 67890) is not.
Given integers A and B with the same number of digits and no leading zeroes, how man...
I'm wondering how this code could be improved. I especially don't like the use of mutable Buffer but not sure what the best way to get it out cleanly.
def find(service: Service): Traversable[Long] = {
def loop(lastId: Option[Long])
(acc: mutable.Buffer[Long])
(q...0
I'm currently developing a new version of ExpressGenGen Using TDD. While I'm rewriting the new version of my Code Generator Generator, I'm using It's old version to generate code to be used by the new version. This is how I'm creating new classes, When a new class is created It will generate a .c...
0
I'm currently developing a new version of ExpressGenGen Using TDD. While I'm rewriting the new version of my Code Generator Generator, I'm using It's old version to generate code to be used by the new version. This is how I'm creating new classes, When a new class is created It will generate a .c...
0
Rubberduck is a COM add-in for the VBA Editor (VBE) that provides an amazing range of functionalities that take programming in VBA to a whole new level.
4 tweets, 1 followers, following 6 users
I want to check if there are following chars in the input field:
a-z A-Z whitespace , & () /
Please check if the following syntax is correct or maybe no need for [] brackets
preg_match('/^[a-zA-Z\s][,][&][()][/]+$/', $value)
I want the text to go away in 2 seconds after level1text = true.
#!/usr/bin/python
import pygame
import time
pygame.init()
blue = (25,25,112)
black = (0,0,0)
red = (200,0,0)
bright_red = (255,0,0)
white = (255,255,255)
groundcolor = (139,69,19)
green = (80,80,80)
other_green = (110,110,110...
I'm new to C# and am currently enjoying this exercise I'm working on for fun: I wish to write optimized code for the searching of particular strings per line in a (very large) file, counting how many exist, and producing a text file with a count of said strings.
The data format is actually very...
I have a ParseTree listener implementation that I'm using to fetch global-scope declarations in standard VBA modules:
public class DeclarationSectionListener : DeclarationListener
{
private bool _insideProcedure;
public override void EnterVariableStmt(VisualBasic6Parser.VariableStmtCont...
I was wondering which code might be "better." I'm abstracting away the rote code as follows:
type InvokerArgs = any[]
interface InvokerFunctions {
/**
* yep is a wonderful function
*/
yep: (r: string, s: number) => InvokerArgs
nope: (t: boolean, u: string) => InvokerArgs
}
var invoker...0
I'm working on a project which requires transmitting a MP4 video from a Java (Android) server to a C++ (Visual studio) client.
Everything works fine if I use a Java Client, but with the C++ client I receive a file 1bit larger that the file sent. As a result, the file won't obviously open. I don'...
Challenge:
Print set intersections.
Specifications:
Your program should accept as its first argument a path to a filename.
Each line in the file is a test case.
Each test case contain two semicolon delimited sorted lists of numbers in ascending order, whose numbers are separated b...
A splay tree is a self-adjusting binary search tree with the additional property that recently accessed elements are quick to access again. It performs basic operations such as insertion, look-up and removal in O(log n) amortized time. For many sequences of non-random operations, splay trees perform better than other search trees, even when the specific pattern of the sequence is unknown. The splay tree was invented by Daniel Dominic Sleator and Robert Endre Tarjan in 1985.
All normal operations on a binary search tree are combined with one basic operation, called splaying. Splaying the tree for...
After a few pages reading Learning Python Hard Way, I've decided to try to make a simple cm-to-inch calculator. I am very excited about this achievement, and I want someone to check my code. It works well, but i just need someone to confirm everything is written well.
# cm to inch calculator
in...
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