Tutorial by Examples: b

A form of range that expects the user to select from among discrete choices. <input role="spinbutton" aria-valuemax="100" aria-valuemin="0" aria-valuenow="25" type="number" value="25">

A grouping label providing a mechanism for selecting the tab content that is to be rendered to the user. <ul role="tablist"> <li role="tab">Introduction</li> <li role="tab">Chapter 1</li> <li role="tab">Chapter 2&l...

A section containing data arranged in rows and columns. The table role is intended for tabular containers which are not interactive. <table role="table"> <thead> <!-- etc --> </thead> <tbody> <!-- etc --> </tbody> </table...

A list of tab elements, which are references to tabpanel elements. <ul role="tablist"> <li role="tab">Introduction</li> <li role="tab">Chapter 1</li> <li role="tab">Chapter 2</li> </ul>

A container for the resources associated with a tab, where each tab is contained in a tablist. <ul role="tablist"> <li role="tab">Introduction</li> <li role="tab">Chapter 1</li> <li role="tab">Chapter 2</li> ...

Input that allows free-form text as its value. <textarea role="textbox"></textarea>

A collection of commonly used function buttons represented in compact visual form. <ul role="toolbar"> <li><img alt="New" src="new.png"></li> <li><img alt="Open" src="open.png"></li> <li><i...

import java.nio.charset.StandardCharsets; import java.util.Arrays; public class GetUtf8BytesFromString { public static void main(String[] args) { String str = "Cyrillic symbol Ы"; //StandardCharsets is available since Java 1.7 //for ealier version use ...

If you want to see the schema information of your table, you can use one of the following: SHOW CREATE TABLE child; -- Option 1 CREATE TABLE `child` ( `id` int(11) NOT NULL AUTO_INCREMENT, `fullName` varchar(100) NOT NULL, `myParent` int(11) NOT NULL, PRIMARY KEY (`id`), KEY `momm...

In general, it is considered good practice to throw by value (rather than by pointer), but catch by (const) reference. try { // throw new std::runtime_error("Error!"); // Don't do this! // This creates an exception object // on the heap and would require you to catch the ...

Updating one row UPDATE customers SET email='[email protected]' WHERE id=1 This query updates the content of email in the customers table to the string [email protected] where the value of id is equal to 1. The old and new contents of the database table are illustrated below on the left an...

Unlike other middleware functions error-handling middleware functions have four arguments instead of three: (err, req, res, next). Sample: app.use(function(err, req, res, next) { console.error(err.stack); res.status(500).send('Error found!'); });

A Closure is a function taken together with an environment. The function is typically an anonymous function defined inside another function. The environment is the lexical scope of the enclosing function (very basic idea of a lexical scope of a function would be the scope that exists between the fun...

Suppose you have many changes in one or more files but from each file you only want to commit some of the changes, you can select the desired changes using: git add -p or git add -p [file] Each of your changes will be displayed individually, and for each change you will be prompted to choose...

A database is created with the following SQL command: CREATE DATABASE myDatabase; This would create an empty database named myDatabase where you can create tables.

Matplotlib supports both object-oriented and imperative syntax for plotting. The imperative syntax is intentionally designed to be very close to Matlab syntax. The imperative syntax (sometimes called 'state-machine' syntax) issues a string of commands all of which act on the most recent figure or a...

First, ensure you have imported sessions from flask from flask import session To use session, a Flask application needs a defined SECRET_KEY. app = Flask(__name__) app.secret_key = 'app secret key' Sessions are implemented by default using a cookie signed with the secret key. This ensures t...

Register a production/sandbox account at https://dashboard.stripe.com/register Insert below code into your webpage where you want to have a checkout button. <form action="/charge" method="POST"> <script src="https://checkout.stripe.com/checkout.js" cl...

NOTE: In most cases, it is better to use a UIButton instead of making a UILabel you can tap on. Only use this example, if you are sure, that you don't want to use a UIButton for some reason. Create label Enable user interaction Add UITapGestureRecognizer The key to create a clickable UIL...

Assuming that you have successfully created a JFrame and that Swing has been imported... You can import Swing entirely import javax.Swing.*; or You can import the Swing Components/Frame that you intend to use import javax.Swing.Jframe; import javax.Swing.JButton; Now down to adding the J...