This does what I want:
function test(data){
for(var key in data){
if(/_is$/.test(key)){
var obj = {}
obj[key] = data[key];
return obj;
}
}
}
test( {a: 'a', user_id_is: '1', b: 'b'} )
> Object {user_id_is: "1"}
But 8 lines of code for such ...
I am performing slice sampling in my codes, but when I run the following codes, the Rstudio runs and never stop. I am wondering where the problem lies in?
dbinorm <- function(x, p1=.5, p2=1-p1, m1=-1, m2=2){p1 * dnorm(x, m1) + p2 * dnorm(x, m2)}
set.seed(100)
n<-1000
xdraw <- rep(NA,n)
x1 <-...
Below is my code in python to solve the matrix factorization problem.
W = XY. However, the codes below is not efficient, and I hope that it can be converted into parallel version, using GPU is the best, CPU is also fine. I am have no experience about parallel programming, so is there anybody can ...
I would like to get all of the Coaches that have an Expertise level above 0 in Sports.
Coach has many Sports through Expertise
Coach.includes(:expertises => :sport).where(["expertises.skill_level > ?", 0]).where(sports: {id: Sport.live.map(&:id)})
Coach.includes(:expertises => :sport).
...
Why does the multiplication method lead to the list being nested with multiple iterations of the same list? E.g.
>>> foo = [[]]
>>> bar = foo * 4
>>> bar
[[], [], [], []]
>>> bar[0].append(1)
>>> bar
[[1], [1], [1], [1]]
>>> id(bar[0])
42445960
>>> id(bar[1])
42445960
>>> rows = 4
>>> bar = []
>>>
I want to create a simple CRUD app using angular on the frontend.
I'm not really happy with the logic here, it seems a bit convoluted for fairly simple functionality.
<div class = "container-fluid">
<div id = "table" class = "row" ng-repeat = "o in objects" ng-init = "o.isBeingEdi...
The following code is designed to be a multidimensional array that works off of a continuous block of memory. It is designed to be able to be resized at runtime, but only when a resize is explicitly requested.
#include <memory>
#include <cstddef>
namespace detail{
template<typename T,template
Here is my code to create a definition text from 3 arguments. Is there any way to make it work with better performance and look nicer?
private const string IllegalCharacters = "\\" + "\"" + "'#,.[]{}" + " ";
public static string CreateDefText(string mainId, string secondaryId, string e...
It is Stroustrup's example code. It does not accept 13 digits or leading zero as it uses an integer for the phone number. I think the only remedy is to replace the integer by a string.
Here is thecode: // example illustrating the use of std::list.
...
I've made this function for to mapping coordinates, using a alphabetic character, to their according ordinal number.
Can it be improved? Or is there a better way to accomplish this task?
Any hints welcomed.
var exec = document.querySelector('#exec');
// Maps alphabetic characters to ...
This is code to solve "Minion's bored game" in Google foobar challenge.
I'm new to dynamic programming, so the only solution I could implement without looking for hints was recursion + memoization. The code works on my own workstation and returns results really fast, but keeps failing in the chal...
I am writing a Model to read, write and store settings.
I think my code is pretty good, but I am not 100% sure.
Any advice on how I could possibly improve it is welcome.
import ntpath
import yaml
class Settings:
def __init__(self, paths=None, default_path=None):
"""Load, write and...
Problem:
Given 2 strings, consider all the substrings within them of length
len. Len will be 1 or more. Returns true if there are any such
substrings which appear in both strings. Compute this in linear time
using a HashSet.
I know as a matter of fact that there are many areas upon w...
I am learning to write micro bench marks for Java methods. I read that while writing methods for bench marking we should be careful of writing code which compiler/JVM can optimize.
I have writeen my first bench mark for stack. Just by looking at my code it looks like a lot of code being repeate...
class Random
{
public class manager extends Random
{
int k = 5;
public class director extends manager
{
int r = k-3;
public void display()
{
System.out.println(r+" ");
}
}
}
public class engineer extends Random
{
//to be edited later
}
public class Admin extends Random
...
I'm in the process of implementing a Bit Vector class as an exercise, however only knowing Rust for less than a week I run into trouble with the following code:
use std::cmp::Eq;
use std::ops::BitAnd;
use std::ops::Index;
use std::ops::Not;
struct BitVector<S = usize>
where S: Sized + BitAnd<
This is an update from here. This tool is a Windows Form application that can add fields and scripts to PDF files, as well as convert Microsoft Office Word documents to PDF. The usage is as follows:
User opens program and presses "Select Files" button.
A dialog opens allowing the user to select...
The code correctly works, but I wanted to see if I could optimize this further. Limitation's do exist, but for this project they're okay.
protected SqlParameter[] ConvertPropertyToSqlParameter<TEntity>(TEntity model)
{
var parameters = new List<SqlParameter>();
var prope...
I grabbed the form from some random site because I'm only interested writing the javascript at the moment.
I am trying to check that a user has selected or entered text for all fields. I've made it a long if if-else but that can't be the best/most elegant/easiest solution.
Leaving aside the rad...I hope this is the right place for this. I basically wrote the below script for a SharePoint 2013 where I needed to get the department of the currently logged in user.
I was finally able to get it working, but I am not happy with the structure at all:
<script src="//ajax.aspnetcdn.com/ajax/jQu...
I have a similar problem as in this mail. I want that every time I return the same C++ managed object to python,
I get the same PyObject. With the standard converter I get always a new wrapper-PyObject. The solution should fulfill
the following requirements:
get() == get() (The python object ...
I have a project here that looks pretty good and does exactly what I want it to do. The codepen is here. What I need to find out is if these divs that flip:
<div class="flip-container" id="flipcontainer">
<div class="flipper" id="flipper">
<div class="front" id="front">
<...
I've a working implementation in Symfony2 with doctrine of the following model.
A Parent can apply for one/more Training(s)
A Training is based on a specific Skill, but you can have multiple trainings at different dates for the same skill.
Once a Parent attends the training he can be marked...
Memacahe get and set can hit a race condition if you use it for something like locking. add actually doesn't get to this problem because it just sets only if the items doesn't exists.
A Simple memcache locking logic using get and set would be like:
def access(resource):
if memcache.get(reso...
Suppose you have a String, \$S\$ of length \$N\$ indexed from \$0\$ to \$N-1\$. You also have some String, \$R\$, that is the reverse of \$S\$, where \$S\$ is funny if the condition is \$|S[i] - S[i-1]| = |R[i] - R[i-i]|\$ is true for all \$i \in [1, N-1]\$.
I code mainly in Java. I'm very ...
I'm currently working with an SDK where methods return an optional array of objects with optional properties. Only the array itself is optional, it will either be nil or always contain non-optionals. I'm struggling to find a cleaner way to unwrap optional properties for each non-optional in the...
I'm trying to figure it out how to simplify my SQL query.
team_challenges.select(
"challenges.*,
CASE WHEN EXTRACT(epoch FROM steps.end_at) < EXTRACT(epoch FROM timestamp 'now')
THEN 2 * EXTRACT(epoch FROM timestamp 'now') - EXTRACT(epoch FROM steps.end_at) + 3538377300
ELSE EX...
(let [[area exch line] (trio n)]
(format "(%s) %s-%s" area exch line))
Is there a way to call (trio n) in-place to avoid the use of let?
If there is a way, would you prefer it over let?
Just checking if I could still do it:
#include <iostream>
#include <algorithm>
std::size_t getParent(std::size_t n)
{
return (n - 1) / 2;
}
template<typename I>
void heapify(I begin, I end)
{
std::size_t size = std::distance(begin, end);
for(std::size_t loop = 1;loop < size; ++l...
On Monday and Tuesday I started learning Erlang through the Erlang Koans, and around Wednesday night I decided to use my newfound knowledge to implement a simple text editor (Akin to ed(1)). Currently I have the following:
-module(text).
-compile(export_all).
%% State => {file, buffer, cursor}
...
How can i optimize this code
Header File:
#pragma once
#ifndef Account_h
#define Account_h
#include "stdafx.h"
#include <iostream>
#include <string>
#include <fstream>
#include <iomanip>
#include <assert.h>
using namespace std;
struct Birth_Date
{
int Day;
int Month;
int Year;
};...
I wrote some classes to convert some documents (PDF, DOC, DOCX and TXT) to only text so that it can be stored in a search engine.
Here's how I use those classes :
$file = 'text.doc'; // comes from the user, hardcoded for the example
$file_extension = pathinfo($file, PATHINFO_EXTENSION);
switc...
I am trying to read a big file line by line, inspect and cleanse each row and write to either of the two output files depending on the outcome. I am using channels for this. I am still quite new to this language so trying to build stuff by looking at examples. There is something I am doing wrong ...
I have been making this code for a while. Its a board game in java with GUI.
In this game, a user clicks in a tile in the board and it's supposed to check only for neighbors tiles horizontally and vertically, but it's searching tiles in diagonal too. This unwanted result is probably in the method...
I just created a simple gallery with scroll. Everything works fine but I'm not sure how should I optimize this code:
document.addEventListener("DOMContentLoaded", function() {
var smallImages = document.querySelectorAll('li img');
var bigPhotoDiv = document.querySelector('.bigPhoto img');
var s...
