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I'm writing a Java Servlet application where the users must enter information about a business. I'd like to prevent as many duplicate entries in the MySQL database as possible and I'd appreciate people's comments on the logic of the process.
When the user fills out the form and submits it, the ...
I have this code which calculates the factorial of a number and then gets the natural log of that number, however: the output keeps saying NaN
import java.util.Scanner;
public class Nov6 {
public static void main(String[] args) {
Scanner stdIn = new Scanner(System.in);
double num;
...
I'm wondering if this is good design, or if the definition of the __init__, __call__, and __repr__ methods should be inside of mesh_class_meta itself instead of inside of the factory, mesh_class.
If it is better to for them to be defined (I suppose as a @staticmethod) inside of the metaclass de...
0
I have a question about using an IDisposable object in the ThreadStart function. I have a class that derives from ServiceBase:
public class ServiceTest: System.ServiceProcess.ServiceBase
{
private System.ComponentModel.Container components = null;
private System.Threading.Thread ...
What I'm Attempting:
My idea here is to minimize the amount of resources loaded into my program by using CRTP and static members. (Specifically I'm planning on using this for loading OpenGl shader programs)
This is to separate some of the boiler plate setup code (combining shaders into a progra...
I came across once-only lisp macro, yet another implementation today, in which the OP is following up on a previous question whereby OP had improved some code, presumably fixing it.
I tried implementing my own macro for the same purpose earlier, but it had a bug, as pointed out at once-only l...
Given an array of numbers and another number k, how can I find the number of 2 elements such as their difference is equal to k.
def pairs(n)
n.combination(2).select{|x|(x[0]-x[1] == 2) || (x[1]-x[0] == 2)}.count
end
I ran a test where n was an array of 8000 different 10 digit numbers.
Howev...
I'm a complete beginner to intermediate programming. I have tried using PHP and Java to parse a CSV file and process the links stored within it line by line. From my understanding, reading a large file line by line is slower compared to reading the same file in chunks.
Currently I'm at a stands...
I made an immutable list class using the head-tail idiom. If I did this correctly, it implements persistent data structures. Unfortunately it doesn't scale well as VBA is not tail recursive. Note: I use a method called seq.Assign to handle assigning objects without using Set. I would like to ...
I've got a Backbone.Collection which looks like this:
define([
'background/mixin/collectionMultiSelect',
'background/model/searchResult'
], function (CollectionMultiSelect, SearchResult) {
'use strict';
var SearchResults = Backbone.Collection.extend({
model: SearchResult...
I made another markdown parser. (origional, this one, on github). Look, I'm not crazy, I just like making markdown parsers…
String.prototype.replaceAll = function(find, replace) {
if (typeof find == 'string') return this.split(find).join(replace);
var t = this, i, j;
while (typeof(i ...0
I've come up with the following code to generate a list of all dates between two given dates:
def generate_all_valid_dates_in_range(_start_date, _end_date) do
(:calendar.date_to_gregorian_days(_start_date) .. :calendar.date_to_gregorian_days(_end_date))
|> Enum.to_list
|> Enum.map (&(:cale...
6
I'm having my first go at making an API for a Python app using the Django REST framework.
I'd like to take a JSON as input using a POST request, compute some numbers, and then return these numbers using a GET request. I was able to get this working by using the following code.
views.py
from si...1
As some of you know, I have been working with Gray codes and am trying to design a good gray_code class in modern C++. I will end up posting several parts of the implementation, but what I want to be reviewed is mostly the addition function. Anyway, here is the code of the class essentials:
temp...
You use an intermediate value (which is not yet present in the sentence).
story = story.replace("foo", "lala");
story = story.replace("bar", "foo");
story = story.replace("lala", "bar");
I need to replace many different sub-string in a string in the most efficient way.
is there another way other then the brute force way of replacing each field using string.replace ?
Use the replaceEach() method Apache Commons StringUtils
See the last example which would seem to do what you want.
http://commons.apache.org/proper/commons-lang/javadocs/api-release/org/apache/commons/lang3/StringUtils.html#replaceEach(java.lang.String, java.lang.String[], java.lang.String[])
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