Tutorial by Examples: le

Selection Sort Basic Information

Selection sort is a sorting algorithm, specifically an in-place comparison sort. It has O(n2) time complexity, making it inefficient on large lists, and generally performs worse than the similar insertion sort. Selection sort is noted for its simplicity, and it has performance advantages over more c...

algorithm • Selection Sort

Implementation of Selection sort in C#

I used C# language to implement Selection sort algorithm. public class SelectionSort { private static void SortSelection(int[] input, int n) { for (int i = 0; i < n - 1; i++) { var minId = i; int j; for (j = i + 1; j < n; j++...

algorithm • Selection Sort

Element access

1. at(pos) Returns a reference to the element at position pos with bounds checking. If pos is not within the range of the container, an exception of type std::out_of_range is thrown. The complexity is constant O(1). #include <array> int main() { std::array<int, 3> arr; ...

C++ • std::array

Simple React Component

We want to be able to compile below component and render it in our webpage Filename: src/index.jsx import React from 'react'; import ReactDOM from 'react-dom'; class ToDo extends React.Component { render() { return (<div>I am working</div>); } } ReactDOM.re...

React • Setting Up React Environment

HTML file to use react component

Setup a simple html file in the root of the project directory Filename: index.html <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title></title> </head> <body> <div id="App"></div> ...

React • Setting Up React Environment

Transpile and bundle your component

Using webpack, you can bundle your component: $ webpack This will create our output file in build directory. Open the HTML page in a browser to see component in action

React • Setting Up React Environment

Simple Key/Value Database

This source code create a simple key/value store service based on map Erlang datastructure. Firstly, we need to define all information concerning our gen_server: -module(cache). -behaviour(gen_server). % our API -export([start_link/0]). -export([get/1, put/2, state/0, delete/1, stop/0]). %...

Erlang Language • gen_server behavior

Memory leaks in Java

In the Garbage collection example, we implied that Java solves the problem of memory leaks. This is not actually true. A Java program can leak memory, though the causes of the leaks are rather different. Reachable objects can leak Consider the following naive stack implementation. public class ...

Java Language • Java Memory Management

Linked List implementation in C++

Creating a List Node class listNode { public: int data; listNode *next; listNode(int val):data(val),next(NULL){} }; Creating List class class List { public: listNode *head; List():head(NULL){} void insertAtBegin(int val); void insertAtEnd(int val)...

C++ • Data Structures in C++

B - Rendering the basic google map

Getting You Browser Ready - Polyfill it Create a new landing page for our element, at index.html. Include polyfills for a custom element to work.Also import the custom element g-map, which we registered with Polymer. Note: Webcomponents, are the necessary polyfill for browser support. Polym...

polymer • Google Map Mark With Built in Cache

C - Adding Search Ability to our custom element

For Searching a place, we use the powerful element that Polymer ships, called google-map-search . All you need to do, is pass a map object and a query string to the element like so: <google-map-search map=[[map]] query=[[query]]></google-map-search> How do we pass the map ob...

polymer • Google Map Mark With Built in Cache

The Complete Custom Google Map Polymer With In Built Cache

polymer • Google Map Mark With Built in Cache

Largest and smallest items in a collection

To find the largest items in a collection, heapq module has a function called nlargest, we pass it two arguments, the first one is the number of items that we want to retrieve, the second one is the collection name: import heapq numbers = [1, 4, 2, 100, 20, 50, 32, 200, 150, 8] print(heapq.nl...

Python Language • Heapq

Smallest item in a collection

The most interesting property of a heap is that its smallest element is always the first element: heap[0] import heapq numbers = [10, 4, 2, 100, 20, 50, 32, 200, 150, 8] heapq.heapify(numbers) print(numbers) # Output: [2, 4, 10, 100, 8, 50, 32, 200, 150, 20] heapq.heappop(numbers) # 2...

Python Language • Heapq

[Introductory] Simple View (Hello World Equivalent)

Let's create a very simple view to respond a "Hello World" template in html format. To do that go to my_project/my_app/views.py (Here we are housing our view functions) and add the following view: from django.http import HttpResponse def hello_world(request): html = "&lt...

Django • Views

Basic example

With Class-Based Views, we use classes instead of methods to implement our views. A simple example of using Class-Based Views looks as follows: from flask import Flask from flask.views import View app = Flask(__name__) class HelloWorld(View): def dispatch_request(self): ret...

Flask • Class-Based Views

Loading external Class files into script.

Dim classFile : classFile = "carClass.vbs" Dim fsObj : Set fsObj = CreateObject("Scripting.FileSystemObject") Dim vbsFile : Set vbsFile = fsObj.OpenTextFile(classFile, 1, False) Dim myFunctionsStr : myFunctionsStr = vbsFile.ReadAll vbsFile.Close Set vbsFile = Nothing Set fs...

vbscript • Using Classes

Binding std::function to a different callable types

/* * This example show some ways of using std::function to call * a) C-like function * b) class-member function * c) operator() * d) lambda function * * Function call can be made: * a) with right arguments * b) argumens with different order, types and count */ #include &lt...

C++ • std::function: To wrap any element that is callable

Storing function arguments in std::tuple

Some programs need so store arguments for future calling of some function. This example shows how to call any function with arguments stored in std::tuple #include <iostream> #include <functional> #include <tuple> #include <iostream> // simple function to be called d...

C++ • std::function: To wrap any element that is callable

Asynchronous Controller

public async Task<actionresult> Index() { return View("View", await db.UserMasers.ToListAsync()); }

asp.net-mvc-5 • Asynchronous Controller in MVC 5