All Questions
0
votes
0answers
10 views
Google Spreadsheet Script - Looping through selected cells to indent text [on hold]
I have written the following Google Spreadsheet script that attempts to loop through all selected cells and then update the value so that it adds an indent, by adding =CONCAT(REPT( CHAR( 160 ), 5),"' ...
2
votes
0answers
10 views
Lots of repeating code, trouble refactoring
I'm looking for a design pattern or suggestions that can help refactor my code into something a bit less repetitive. I have a method that has several sequential steps (10-15) that if any of them fail ...
1
vote
1answer
14 views
All permutations of the pairs that add to squares
Given a number, this program would find "all permutations of the pairs that add to squares" from 1 to
number.
Eg: Given input a number 16, one of the possible answers would be:
...
1
vote
0answers
7 views
ListView-row Controller?
In most examples ListView routine is pretty simple:
Adapter keeps a list of models
In getView() method, it binds
model's property to row's subviews
There's no controller-object which is binding ...
1
vote
0answers
10 views
Writing a JTable to a tab delimited file
I have wrote this class that will write JTable to a tab delimited file so that it can be opened in Excel. It works great but is there any way to make it better or is there a way to have it directly ...
0
votes
0answers
16 views
Sorting comments into a multidimensional array using recursion PHP [on hold]
I fetch my commments using MYSQL, with the format
comment_id, parent_id, group_id, message
Where the parent_id can be empty if the comment is a 1st level comment.
I store my nested comments, i.e ...
0
votes
0answers
10 views
Nasty CBuilder autogenerated code [on hold]
I'm using C++ builder XE2. If I create a new VCL Forms application. It creates the following function for main.
WINAPI _tWinMain(HINSTANCE, HINSTANCE, LPTSTR, int)
{
try
{
...
1
vote
1answer
29 views
Partial sums of two dimensional array
I recieve a number n and then recieve n*n integers, representing a matrix, or an array of [n][n]. I want to create an array [n][n], where every cell contains the sum of all cells "left and above" from ...
5
votes
1answer
36 views
Orchard Partitioning in to close-to-equal sectors
The task (from this site) is to create a program that will solve a problem where a matrix (size n * n), which contains integers, is to be divided into four parts, the sums of which are as close to ...
1
vote
1answer
27 views
Performance issue of LFU-like web caching replacement algorithm
I have implemented a simulation program that runs LRU and another web caching algorithm called Sliding Window LFU. I want to compare them both in terms of the hit rate and their run time. SW-LFU works ...
2
votes
1answer
29 views
Async Queue Processing
I have a Queue that needs to try to process when anything updates in it (add, remove or update).
However, I don't want any of the callers to wait while the processing is happening (either for the ...
4
votes
0answers
45 views
Calculate min, max, average, and variance on a large dataset
I got a piece of Java code using Hadoop to calculate min, max, average and variance on a large dataset made of (index value) couples separated by a newline:
0 11839923.64831265
1 5710431.90800272
...
7
votes
1answer
71 views
Requesting Resources Until Exhaustion
When an API has a 'next' feature, I use the following pattern to obtain all the results:
/** Obtains a list of channels followed by a user */
function get_follows(username, callback) {
var ...
4
votes
1answer
29 views
Improve performance of Gaussian kernel function evaluation
I need to improve the performance of a function that calculates the integral of a two-dimensional kernel density estimate (obtained using the function stats.gaussian_kde) where the domain of ...
6
votes
1answer
41 views
Highlight countries based on category
In the below code I should highlight countries on the map based on the category of the country in which there are 2 different type of countries (issuing office and selected countries). Based on the ...
2
votes
1answer
38 views
How to generate balls and box combinations depending on rule set I have?
I am working on a project in which I have three box (as of now) and each box will have some color of balls
So I am storing the input in a Map of String and List of String as shown below.
...
8
votes
2answers
196 views
Customised Java UTF-8
I have implemented a customized UTF-8 encoding mechanism. The code works fine, but I have a lot of concerns regarding the code.
public class Utf8Encoding {
public static void main(String[] args) ...
1
vote
2answers
32 views
Reusing objects using a Generic Object Pool
After reading a lot of documents, I wrote this object pooling code. Can anyone help me to
improve this code.?
I am lagging in validating the object, confirming whether I can reuse it or not?
If ...
0
votes
0answers
20 views
Timer Manager for socket programming [on hold]
I am trying to write a class as Timermanager for managing tasks based on time intervals under socket communication, for eg: when a client request for a service from the server and if the client doesnt ...
3
votes
1answer
54 views
How do I extract interfaces from existing similar classes?
I have about 11 singleton-esque classes divided over a dozen files:
the first file is one that gathers all singleton definitions and makes them callable on a request scope:
public sealed partial ...
0
votes
2answers
30 views
Build a local cache of all streams from Twitch.TV API
I am trying to cache the entirety of streams from Twitch.TV public API with the following code. It is successful but takes almost a full minute to execute so I am wondering if it's my code or just the ...
2
votes
2answers
40 views
Dependency on overridden method
In my code I have a base type which is OnlinePaymentTransaction:
public abstract class OnlinePaymentTransaction
{
public abstract void Complete( PaymentGatewayCallbackArgs args );
}
The ...
2
votes
0answers
12 views
Product grid for a online catalog
I have this portion of code and I would like to know if I did it right, what changes could be done to optimize and make it better, and if I used the all the tags the right way. For the moment, the ...
0
votes
0answers
13 views
level traverse a binary tree [on hold]
Level traverse binary tree question
The problem is pretty common level order traverse a binary tree but break each level into single array.
I implemented mine: I've designed a few test cases, but ...
2
votes
1answer
56 views
Speedup cython dictionary counter
I wrote a simple cython script to optimize the collections.Counter of a dictionary counter and the python zip implementation (the main input is a list of tuples). Is there a way to speed it up?
...
2
votes
2answers
29 views
Elegant way of making a List of an attribute from a list of objects containing that attribute
If this is my class:
class Something
{
UUID id;
// Other members
}
Given a List<Something> things and I want to get a List<UUID> ids, this is what I usually do:
...
0
votes
0answers
5 views
Suggest a best practice to create Constants class [migrated]
There is a debate in between my team members about declaration of Constants class. We are moving the constant variables into separate class as like below
public class Contants
{
public const ...
2
votes
0answers
31 views
Listen to multiple RabbitMQ queue by task and process the message
Single app which listen to multiple RabbitMQ queue and process the message. This is working fine but not sure this implementation is right one or I am missing something.
Implementation is inspired ...
7
votes
2answers
169 views
Int stack implementation
#include <stdio.h>
#include <stdlib.h>
struct Stack {
int value;
int is_empty;
struct Stack *next;
};
int pop(struct Stack **stack) {
if ((*stack)->is_empty == 1) {
...
3
votes
1answer
26 views
Using jquery Callbacks.fire method as a event handler
So I've got a jquery project where I'm using an external class that has callback style events. Meaning, it has an "onSave" property that takes one function. However, I need to more than one other ...
6
votes
2answers
263 views
Pong game written in C++ and using SDL 2.0
I've just finished writing my first game. It's a clone of the classic pong game for Linux and Mac only. You will need SDL 2.0, SDL_ttf 2.0 and SDL_Mixer 2.0 to compile it. The complete project can be ...
9
votes
5answers
333 views
Direction enum class
As request of Simon's comment:
Direction.java
package net.woopa.dungeon.datatypes;
import java.util.Random;
public enum Direction {
NORTH, EAST, SOUTH, WEST;
private static Random rnd = ...
1
vote
1answer
71 views
How to turn 201 queries into 1? [on hold]
I have a PHP web app that manages contacts. It has four main functions that display: contacts with upcoming birthdays; the 20 most viewed contacts; all contacts (200 limit) plus their phone number ...
5
votes
1answer
52 views
A non-blocking lock decorator in Python
I needed to impose on a Python method the following locking semantics: the method can only be run by one thread at a time. If thread B tries to run the method while it is already being run by thread ...
2
votes
0answers
23 views
Code to write data to Excel
I have a need to read properties from soapUI using groovy and writing them to Excel. I initially had a problem with writing to Excel, but I was able to solve that. Now I want to know if my solution is ...
11
votes
5answers
3k views
Why is my C# program slower than my Python program?
I made a program on python, and wanted it to be faster, so I wrote it on C#, because it's compiled. To my surprise, the python program is much faster. I guess there is something wrong with my C# code, ...
9
votes
2answers
184 views
Factorizing integers
I'm working on this method in Java, which is giving me the factors of a number. I'll be using this method a lot, and I was wondering if there isn't a better way of doing it. Like, with just one loop. ...
0
votes
0answers
23 views
RESTful client with Java using Apache HttpClient [on hold]
I would like to implement an independent class to communicate with a RESTful resource, using Java.
The parsing of the InputStream into JSON will occur outside of this class by a different entity.
...
5
votes
3answers
295 views
WHERE NOT IN SQL Performance
SELECT TOP 1 l.ID
FROM Leads l
WHERE
l.ID NOT IN (SELECT LeadID FROM LeadFollowups)
AND l.ID NOT IN (SELECT LeadID FROM LeadsWorking)
AND l.ID NOT IN (SELECT LeadID FROM LeadsDead)
...
5
votes
2answers
56 views
Cash Register Kata
The Setup
This kata is a spin on the old backpack problem. Please give feedback on both the kata itself as well as my solution. I'm not sure if the kata needs to lead the student more or if this is a ...
2
votes
2answers
211 views
Singleton design pattern
I am a beginner in PHP-OOP and design patterns. I have got this basic piece of code in Singleton Pattern and I changed it in order to understand its behavior. I can see that it works as expected.
...
2
votes
2answers
26 views
Improving and shortening code for select validation
Is there any way to make that code shorter? I still want to use jQuery. I don't want to use any validation script.
$("#form").submit(function (e) {
var tmp = $('#select-1').val();
var tmp1 = ...
4
votes
2answers
53 views
How to chain exceptions?
I have some function like:
void foo() { ... }
int main() {
...
try {
...
foo();
...
} catch (const std::exception &e) {
std::cout << "Fatal error: e.what() << ...
3
votes
1answer
35 views
Check for similar value with SQL
I've two table (t1 and t2) with 3 identical integer columns : c1, c2 and c3.
I want to count how many value in t1 are in t2
So I start to write :
SELECT count(t1.value) FROM t1 INNER JOIN t2 ON (
...
3
votes
1answer
23 views
“Histogram of Oriented Gradients” (HOG) feature detector for Computer Vision: trying to optimize for speed
Below is a function that I've only slightly modified from it's original context, found here.
Before mentioning anything else, it should be noted that I'm desperately trying to optimize this code for ...
0
votes
0answers
16 views
UVa 102 - Ecology Bin Packing -> Wrong Answer [on hold]
This is C++11 code. Trivial answer and a comedian "wrong answer" from UVA.
#include <iostream>
#include <string>
#include <vector>
const short block = 3;
const short BGC = 3;
...
5
votes
2answers
198 views
QuickSort of Comparable[]
Here is the code for the QuickSort class that I created.
public class QuickSort {
public static void sort(Comparable[] a) {
quicksort(a, 0, a.length-1);
}
...
5
votes
1answer
52 views
Variadic templates and pointers to member functions to achieve a named-parameters interface in C++
I studied a bit and packed all the suggestions that I received here: Fluent interface and polymorphism and I came up with this:
#include <iostream>
#include <cmath>
#include ...
4
votes
2answers
94 views
API for Dungeon Generator
I am writing a ASCII dungeon creator inspired from games such as Angband, Moria etc.
The main goal of the project is to allow a user to come along and implement their own "DungeonLevelGenerator" so ...
3
votes
2answers
62 views
Project Euler “Largest product in a grid” (#11) in Java 8
I have come up with a Java 8 solution for the following problem:
In the 20×20 grid below, four numbers along a diagonal line have been marked in red (bold here).
08 02 22 97 38 15 00 40 00 75 ...
