Tutorial by Examples: b

Place a file like the following in your top level directory. It defines which components to render for which paths import React from 'react'; import { Route, IndexRoute } from 'react-router'; import New from './containers/new-post'; import Show from './containers/show'; import Index from './c...

django-filter is generic system for filtering Django QuerySets based on user selections. The documentation uses it in a function-based view as a product model: from django.db import models class Product(models.Model): name = models.CharField(max_length=255) price = models.DecimalField(...

Salesforce Navigator (Google Chrome) Force.com Logins (Google Chrome, Firefox) Salesforce Developer Tool Suite (Google Chrome) Salesforce Lighting Components Inspector (Google Chrome) Salesforce Developer Tool Suite (Google Chrome) Salesforce Schema Builder Expander (Google Chrome) Boostr fo...

Use the analytical function row_number(): with t as ( select col1 , col2 , row_number() over (order by col1, col2) rn from table ) select col1 , col2 from t where rn between N and M; -- N and M are both inclusive Oracle 12c handles this more easily with OFFSET and FETCH.

If you were to hide a link by setting display: none in the CSS then screen readers wouldn’t find it. Instead, we position it absolutely, with clipping. CSS .offscreen { position: absolute; clip: rect(1px 1px 1px 1px); /* for Internet Explorer */ clip: rect(1px, 1px, 1px, 1px); padding: 0; b...

There are a few way's to install WebSocket's to your project. Here are some example's: npm install --save ws or inside your package.json using: "dependencies": { "ws": "*" },

To add ws to your file's simply use: var ws = require('ws');

To open a new WebSocket, simply add something like: var WebSocket = require("ws"); var ws = new WebSocket("ws://host:8080/OptionalPathName); // Continue on with your code... Or to open a server, use: var WebSocketServer = require("ws").Server; var ws = new WebSocketS...

var WebSocketServer = require('ws').Server , wss = new WebSocketServer({ port: 8080 }); // If you want to add a path as well, use path: "PathName" wss.on('connection', function connection(ws) { ws.on('message', function incoming(message) { console.log('received: %s', message); ...

Spinner It is a type of dropdown input. Firstly in layout <Spinner android:id="@+id/spinner" <!-- id to refer this spinner from JAVA--> android:layout_width="match_parent" android:layout_height="wrap_content"> </Spinner> ...

Assuming that you have node and npm installed and available, create a project folder with a valid package.json. Install the necessary dependencies: npm install --save-dev metalsmith metalsmith-in-place handlebars Create a file called build.js at the root of your project folder, containing the fo...

app.use() and middleware can be used for "before" and a combination of the close and finish events can be used for "after". app.use(function (req, res, next) { function afterResponse() { res.removeListener('finish', afterResponse); res.removeListener('clos...

<input type="text" value="<?php echo esc_attr($_POST['username']); ?>" />

String base64="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="; void setup() { Serial.begin(9600); // Turn the serial protocol ON Serial.println("Start Typing"); } void loop() { if (Serial.available() > 0) { // Check if data has bee...

After you obtained BluetoothDevice, you can communicate with it. This kind of communication performed by using socket input\output streams: Those are the basic steps for Bluetooth communication establishment: 1) Initialize socket: private BluetoothSocket _socket; //... public InitializeSock...

You can create a new cron entry by simply typing crontab -e on the command line. If it's the first time you want to edit your crontab(le), you will be prompted with an editor selection: no crontab for <user> - using an empty one Select an editor. To change later, run 'select-editor'. ...

Create a sample application using spring-boot from spring-boot initializer site. Import the code in your local IDE and run the goal as clean install spring-boot:run -e Go to target folder and check for the jar file. Open your Amazon account or create a new Amazon Account and selec...

Considering the following case: We have user event data with 4 dimensions: A/B Test bucket (prod/test) client Type (web/mobile) module (order/report) event (click/view) test mobile order_module click prod web order_module view prod mobile order_module click ...

It's a good practice to encode state of Single Page Application (SPA) in url: my-app.com/admin-spa/users/edit/id123 This allows to save and share application state. When user puts url into browser's address bar and hits enter server must ignore client-side part of the requested url. If you serv...

In Elixir, one can create multiple implementations of a function with the same name, and specify rules which will be applied to the parameters of the function before calling the function in order to determine which implementation to run. These rules are marked by the keyword when, and they go betwe...