Tutorial by Examples: nd

We install OpenCV 3.1.0 on Windows and get started. There are two ways to install OpenCV on windows. One is to download the installer and run it. Other is to build from source. This is the easiest way to install OpenCV and get started. OpenCV gives pre-build binaries to install on Windows here. Aft...

Here we use the object that we passed to render_template to display the pages, the current active page, and also a previous and next buttons if you can go to the previous/next page. <!-- previous page --> {% if users_list.has_prev %} <li> <a href="{{ url_for('users', page...

First, we need a custom endpoint builder. public class WSConfigurator extends ServerEndpointConfig.Configurator { @Inject private static Injector injector; @Override public <T> T getEndpointInstance(Class<T> endpointClass) throws InstantiationException { ...

Consider a one to one bidirectional relationship between employee and desk. Employee.java @Entity public class Employee { @TableGenerator(name = "employee_gen", table = "id_gen", pkColumnName = "gen_name", valueColumnName = "gen_val", allocationSize...

Show all available databases: show dbs; Select a particular database to access, e.g. mydb. This will create mydb if it does not already exist: use mydb; Show all collections in the database (be sure to select one first, see above): show collections; Show all functions that can be used w...

import pygame background_colour = (255,255,255) # For the background color of your window (width, height) = (300, 200) # Dimension of the window screen = pygame.display.set_mode((width, height)) # Making of the screen pygame.display.set_caption('Tutorial 1') # Name for the window screen.fil...

First, import modules and set connection strings. If you need parameters, you can either put them directly in the URL string (an API in this case) or build them as a dict and pass them to the params argument. import requests import json params = {'id': 'blahblah', 'output': 'json'} # You could ...

How to implement FirebaseRealTime database in android application. Following is the steps for do it. First install firebase sdk, If you dont know how to install then following is the URL for help. Install Firebase SDK After thet register your project in firbase console, URL of the firbas...

A lot of emoji consist of more than one code point. 🇯🇵: A flag is defined as a pair of "regional symbol indicator letters" (🇯 + 🇵) 🙋🏿: Some emoji may be followed by a skin tone modifier: 🙋 + 🏿 😀︎ or 😀️: Windows 10 allows you to specify if an emoji is colored or black/white b...

Imagine the following XML: <root> <element foobar="hello_world" /> <element example="this is one!" /> </root> /root/element[@foobar] and will return the <element foobar="hello_world" /> element.

Imagine the following XML: <root> <element foobar="hello_world" /> <element example="this is one!" /> </root> The following XPath expression: /root/element[@foobar = 'hello_world'] will return the <element foobar="hello_world&quo...

How do you handle errors, rather then log them to the console? Bad way: Router.route('/') .get((req, res) => { Request.find((err, r) => { if(err){ console.log(err) } else { res.json(r) } }) }) .post((req, res) => { const reque...

The following example is a very useful basis when you are trying to convert transaction data to un-pivoted data for BI/reporting reasons, where the dimensions which are to be un-pivoted can have a dynamic set of columns. For our example, we suppose that the raw data table contains employee assessme...

var renderer = Platform.GetRenderer(visualElement); if (renderer == null) { renderer = Platform.CreateRenderer(visualElement); Platform.SetRenderer(visualElement, renderer); } DoSomeThingWithRender(render); // now you can do whatever you want with render

OpenCL is low level api so it must be implemented in "C space" first. For that, one needs to download header files from Khronos' site. My hardware is AMD and capable of version 1.2, downloading opencl.h cl_platform.h cl.h cl_ext.h cl_egl.h cl_dx9_media_sharing.h cl_d3d10.h c...

XML <GrandFather name="Bardock" gender="male" spouse="Gine"> <Dad name="Goku" gender="male" spouse="Chi Chi"> <Me name="Gohan" gender="male"/> <brother name="Goten" ...

XML <GrandFather name="Bardock" gender="male" spouse="Gine"> <Dad name="Goku" gender="male" spouse="Chi Chi"> <Me name="Gohan" gender="male"/> <brother name="Goten" ...

XML <GrandFather name="Bardock" gender="male" spouse="Gine"> <Dad name="Goku" gender="male" spouse="Chi Chi"> <Me name="Gohan" gender="male" /> <brother name="Goten" gender=&q...

XML <GrandFather name="Bardock" gender="male" spouse="Gine"> <Dad name="Goku" gender="male" spouse="Chi Chi"> <brother name="Goten" gender="male" /> <Me name="Gohan" gender=&q...

Details to explain, with picture