in an MCMC procedure I am repeatedly (100,000+ times) running the following function to find the kth order statistic. I ran a profiler and noticed this function was most expensive. I am looking for a way to optimize this code for speed. The reason I think it can be done faster is because I do not...
I have the following code that I have developed to filter out characters from column headings in CSV files so that I can transform the files into an SQL database:
# Fix the column headers
for file in files:
dict_[file].rename(columns = lambda x: x.replace(' ', '_'), inplace = True)
for fil...
The following is my implementation of mergesort with Java generics. I chose to use the iteration variables a_iter and b_iter to prevent modifying the lists while merging. Any suggestions for improvement?
public static <T extends Comparable<T>> List<T> mergesort(List<T> list){
// base case
...
I have some code that is used for validating a condition based on dates, which is always a bit tricky. Here is the code:
package rules
type valueInterval struct {
min int
max int
}
func (v valueInterval) containsClosed(x int) bool {
return x >= v.min && x <= v.max
}
func permanent...
I wrote this little toy today that probes random web servers and prints out the title of their index page. I curious if this code is any good. im a bit rusty.
get_titles.py
#!/usr/bin/env python
""" Probe random web server and print out the title of their index page. """
import os
import sys
...
I was reading about the repository pattern but it felt somewhat less object oriented to me so, I tried to write my code in more OOP way.
For an use case I am experimenting with deleting an entity:
function deleteHotel(req, res) {
const hotelId = req.params.id;
// Approach 1
return new Ho...Two methods are used to run the above code. One is executeThis which either updates the table or displays the output of the query. This works. The other method is runThis method which works only for queries and returns the resultset as a 2d array. Every time i try to print it, it prints null. I f...
Just trying to get used to writing programs in C so have written this program to find valid Knights Tours on a 8x8 board. I guess my queries are more focused on my use of the language and how I could or should do things better.
A little about the code. It is a C implementation based on somethin...
I making a little code to group by n element a array.
First part is simply here for demo purpose => generating an array
let i = 0;
let testArray = [];
while (i < 100) {
i++;
testArray.push({
value: String.fromCharCode(i),
id: i
})
}
// Here is the function
const g...
I want to parse a json file, where some elements are common each time while others are different based on a type.
For example a message json:
{
"title": string,
"body": string,
"type": int (0 for email, 1 for sms, 2 for terminal)
"typeProperties": {
// Different based on...
int[] arr = {4,6,2,2,6,6,1};
int length = arr.length;
int res = 0;
for (int i = 0; i < length; i++)
for (int j = 0; j < length; j++)
if(arr[i] == arr[j]
res = Math.max(res, Math.abs(i-j));
return res;
For my work, I have written this chunk of code but does not seem to b...
i m new in the developpement field and i m stuck at making anobject jump in my first game (it s 2D ) ,thank you ^^
I have a code that computes butterflies and from a little profiling I found out that it's a little bit slow. So, it seemed that the better way to optimize its performance is vectorizing it using Intel SIMD Intrinsics.
This the scalar version of the code that I want to optimize:
float bfly0_re, ...
this no-brainer came up to me in a technical interview. I played it safe and wrote this.
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
System.out.println("enter size of the array: ");
if (!in.hasNextInt()) {
System.out....
I have this all in a single C# file:
public enum ReportTypes
{
TherapySales,
DocumentRequest,
ByteSuccess
}
public enum ReportStatuses
{
Working,
Completed,
Missing
}
public class ReportContainer
{
public string Report { get; set; }
public ReportStatuses Status ...
I find the following piece of code from a blog :
Interlocked.Exchange(
ref myCollection,
myCollection.Add( "Banana" ) );
This code is supposed to add an item to myCollection in a thread safe way.
myCollection is an immutable collection. Everytime the collection is modified, a new insta...
I'm still getting used to python conventions and using pylint to make my code more pythonic, but I'm puzzled by the fact that pylint doesn't like single character variable names. I have a few loops like this:
for x in x_values:
my_list.append(x)
and when I run pylint, I'm getting Invalid na...
What is the time complexity of the following code? I'm implementing prim's algorithm with adjacency matrix representation of the graph and priority queue.
from graph import adj_mtx, AP
import heapq as hq
lv, visited, h = float('inf'), {}, [] # O(n)
def prims_mst(adj_matrix, src):
hq.hea...
Could it work for an OSS dev team?
Say I manage an open-source project (cough), and I'd like to use SO Channels to "channel" contributors' knowledge base in SO-ish Q&A style, is that a use case?
We currently use SE chat for that, and getting new contributors on board involves pulling some bookm...
at the moment I'm learning python. while taking the first steps i implemented a tic tac toe game and wanted to share it here, to get some feedback and continue learning. I'm happy about all hints and tips :)
I'm looking for any improvements within my code: style, common mistakes, etc.
def creat...
The CSyncObject object in CSingleLock constructor can't be NULL but I want it to work with NULL because I need to use this nest.
BOOL CADODatabase::Open(LPCTSTR lpstrConnection, LPCTSTR lpstrUserID, LPCTSTR lpstrPassword)
{
CString database = GetSourceDatabase( lpstrConnection, NULL );
...
Here are my three classes that work on that, so I am looking forward to your great reviews and ideas in order to improve/shorten my code.
I am trying to implement Place Autocomplete service that is a web service that returns place predictions in response to an HTTP request. The request specifie...
I've written some code to parse the names and phone numbers from craigslist. It starts from the link in "m_url" then goes one layer deep to parse the name and then again another layer deep to parse the phone number. Note that it goes 2 layer deep only when it sees "show contact button" on that pa...
This is the first part where i get the symbol.
<?php
$stocks = file_get_contents("https://www.gurufocus.com/api/public/user/.../exchange_stocks/NYSE");
$stocks = json_decode($stocks, true);
$symbol = array_map(function($stocks){
return $stocks['symbol'];},$stocks);
{
print_r($symbol);
?>...
At the moment I'm learning Python and I made this script to workout my skills.
Since it is one of my first programs I would love some feedback and tips, like more organization, less lines of code or more optimization, anything I could improve.
print "Do you want to encrypt or decrypt the messa...
I have this ordered list of datetimes that comprises of 30 minute slots:
availability = [
datetime.datetime(2010, 1, 1, 9, 0),
datetime.datetime(2010, 1, 1, 9, 30),
datetime.datetime(2010, 1, 1, 10, 0),
datetime.datetime(2010, 1, 1, 10, 30),
datetime.datetime(2010, 1, 1, 1...
I have a nested object which I need to filter and sort.
I have a nested Object where some keys like app1 are nested inside another object.
I need to be able to filter out objects with the status of True.
I also need to be able to sort by date irrespective of how deep the object is nested.
...
I just found this post with vim (https://stackoverflow.com/questions/704130/can-i-transpose-a-file-in-vim) and i just wanted to do the same thing with elisp by creating a little script to reordenate all the characters from a buffer text into a vertical position.
As the post said, the original bu...
this is another finished app of mine. It's a traditional pokemon clone simulation but very basic. Could anyone take a look and let me know what I can improve? How would you rate my app overall? Suggestions, corrections, whatever, I'm open to any and all input. I plan on making this a unity game s...
Basically ,I want hash table with link list which stores 3 int type variable so I am using unordered multimap with int and tuple .But its giving me compile time exceed error WHERE I AM DOING WRONG .And is there any other efficient way of doing this .
#include <iostream>
#include <iterator>
#i...
I noticed that the C++ version of <complex> has norm.
However, I am programming in C, and there is no cnorm. So I made one to define before my main function:
#include <complex.h>
double cnorm(double _Complex z)
{
return cpow(creal(z),2) + cpow(cimag(z),2);
}
How would you improve this d...
