Tutorial by Examples: bas

This is a more generic solution applicable in system where the user has option to add indexes to the table that he uses: function createTable(dbName, tableName) { var request = indexedDB.open(dbName); request.onsuccess = function (e){ var database = e.target.result; var version = p...

unordered_map<data_type, data_type> variable_name; //declaration variable_name[key_value] = mapped_value; //inserting values variable_name.find(key_value); //returns iterator to the key value variable_name.begin(); // iterator to the first element variable_name.end(); // iterator t...

Most Singleton examples use MonoBehaviour as the base class. The main disadvantage is that this Singleton class only lives during run time. This has some drawbacks: There is no way of directly editing the singleton fields other than changing the code. No way to store a reference to other assets...

We have seen in those examples (ex_1, ex_2) how to use and override the pagination classes in any generic class base view. What happens when we want to use pagination in a function based view? Lets also assume that we want to create a function based view for MyModel with PageNumberPagination, res...

From your server request to the the link below to send the notification with some request parameters https://fcm.googleapis.com/fcm/send While requesting add headers as follows Authorization key=<Your_key_from_the_console> Content-Type application/json The body of the request v...

An image represents a rectangular grid of picture elements (pixel). In the image package, the pixel is represented as one of the color defined in image/color package. The 2-D geometry of the image is represented as image.Rectangle, while image.Point denotes a position on the grid. The above figur...

Initialization of variable private GoogleApiClient mGoogleApiClient; You must have to Write this Code in onCreate() method of all that when u put signout button. mGoogleApiClient = new GoogleApiClient.Builder(this) .enableAutoManage(this /* FragmentActivity */, this /* OnConnectio...

<?php namespace App\Http\Controllers; use App\User; use App\Http\Controllers\Controller; class UserController extends Controller { /** * Show the profile for the given user. * * @param int $id * @return Response */ public function show($id) ...

As we can add multiple elements in Cart array and then add it to cart session, but there are 4 basic elements which Cart class requires to add data successfully in cart session. id (string) qty (number) price (number, decimal) name (String) And if you want to add more options regardin...

import networkx as nx # importing networkx package import matplotlib.pyplot as plt # importing matplotlib package and pyplot is for displaying the graph on canvas b=nx.Graph() b.add_node('helloworld') b.add_node(1) b.add_node(2) '''Node can be called by any python-hashable obj like string,nu...

Request:"http://example.com" GET / HTTP/1.1 Host: example.com User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:53.0) Gecko/20100101 Firefox/53.0 Accept: text/html Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate Connection: keep-alive The client will accept Engl...

Request:"http://example.com" GET / HTTP/1.1 Host: example.com User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:53.0) Gecko/20100101 Firefox/53.0 Accept: text/html Accept-Language: da, en-gb;q=0.8, en;q=0.7 Accept-Encoding: gzip, deflate Connection: keep-alive The client prefe...

This widget is used to display items with hierarchy. For instance, windows explorer can be reproduced in this way. Some nice tables can be also done using treeview widget. Create the widget tree=ttk.Treeview(master) Definition of the columns You can define how many columns, their width and min...

The QSqlDatabase class provides an interface for accessing a database through a connection. An instance of QSqlDatabase represents the connection. The connection provides access to the database via one of the supported database drivers. Make sure to Add QT += SQL in the .pro file. Assume an SQ...

Essence of searching lies in its order. Everyone wants search results to be shown in such a way that best suited results are shown on top. Relational database do not have such capability. Elasticsearch on the other hand shows results on the basis of relevancy by default. Setup Same as used in ...

When trying to open a Database Connection with QODBC please ensure You have QODBC driver available Your server has an ODBC interface and is enabled to (this depends on your ODBC driver installations) use shared memory access, TCP/IP connections or named pipe connection. All connections only ...

A basic but illustrative heatmap showing correlations between a number of variables. import pandas as pd import seaborn as sns import numpy as np # Sample dataframe with date index and five variables np.random.seed(123) df = pd.DataFrame(np.random.uniform(-0.25,0.25,size=(5, 5)), ...

STUFF(Original_Expression, Start, Length, Replacement_expression) STUFF() function inserts Replacement_expression, at the start position specified, along with removing the characters specified using Length parameter. Select FirstName, LastName,Email, STUFF(Email, 2, 3, '*****') as StuffedEmail Fr...

1.The Unit return type declaration is optional for functions. The following codes are equivalent. fun printHello(name: String?): Unit { if (name != null) println("Hello ${name}") } fun printHello(name: String?) { ... } 2.Single-Ex...

Replace firebase values with your app api values: import firebase from 'firebase'; componentWillMount() { firebase.initializeApp({ apiKey: "yourAPIKey", authDomain: "authDomainNAme", databaseURL: "yourDomainBaseURL", projectId: "yourProjectID", ...