Tutorial by Examples: dh

Underlying type (and hence size) of an enum

If the underlying type is not explicitly specified for an unscoped enumeration type, it is determined in an implementation-defined manner. enum E { RED, GREEN, BLUE, }; using T = std::underlying_type<E>::type; // implementation-defined However, the standard does require th...

C++ • Implementation-defined behavior

Password Hashing

Passwords should never be stored as plain text! They should be hashed with a randomly generated salt (to defend against rainbow table attacks) using a slow password hashing algorithm. A high number of iterations (> 10k) can be used to slow down brute force attacks. A delay of ~100ms is acceptable...

C# Language • Cryptography (System.Security.Cryptography)

http and https redirects and HSTS configuration

Generic redirect to https: # Enable Rewrite engine RewriteEngine on # Check if URL does not contain https RewriteCond %{HTTPS} off [NC] # If condition is true, redirect to https RewriteRule (.*) https://%{SERVER_NAME}/$1 [R=301,L] Generic redirect to http: # Enable Rewrite engine Rewr...

Hypertext Access file • Rewriting and Redirecting

HelloWorld1.java and HelloWorld2.java (iText 7)

Suppose that we wanted to create a simple Hello World document: In iText 7, we could do that like this: public void createPdf(String dest) throws IOException { PdfDocument pdf = new PdfDocument(new PdfWriter(dest)); Document document = new Document(pdf); document.add(new Paragraph...

itext • Pdf Creation: iText 5 versus iText 7

Using Preemptive Basic Authentication with RestTemplate and HttpClient

Preemptive basic authentication is the practice of sending http basic authentication credentials (username and password) before a server replies with a 401 response asking for them. This can save a request round trip when consuming REST apis which are known to require basic authentication. As descr...

spring • RestTemplate

SS 2.0 Ad Hoc Search

require(['N/search'], function(SEARCHMODULE){ var type = 'transaction'; var columns = []; columns.push(SEARCHMODULE.createColumn({ name: 'internalid' })); columns.push(SEARCHMODULE.createColumn({ name: 'formulanumeric', formula: '{quantity}-{...

netsuite • Executing a Search

Monostate-based hierarchies

In contrasto to the Singleton, the Monostate is suitable to be inherited to extend its functionalities, as long as member methods are not static. It follows a minimal example in C++: struct Settings { virtual std::size_t width() const noexcept { return width_; } virtual std::size_t heigh...

Design patterns • Monostate

Receiving and handling button events

This example creates a MediaSession object when a Service is started. The MediaSession object is released when the Service gets destroyed: public final class MyService extends Service { private static MediaSession s_mediaSession; @Override public void onCreate() { // Insta...

Android • MediaSession

SS 2.0 Ad Hoc Search

require(['N/search'], function(SEARCHMODULE){ var type = 'transaction'; var columns = []; columns.push(SEARCHMODULE.createColumn({ name: 'internalid' })); columns.push(SEARCHMODULE.createColumn({ name: 'formulanumeric', formula: '{quantity}-{...

netsuite • Executing a Search

Catching and handling errors in user code

On error move to labelled code and see if there is a specific error that needs to be handled. Public Const cErrCodeNotNumber = 2262 ' This value must be a number. Public Const cErrCodeNumericOverflow = 2263 ' The number is too large. Private Sub MySub() Dim objConn As ADODB.Connection ...

access-vba • Access Error Codes (Form.Error, DataErr)

Install in Eclipse and Build Hello World

(Tested with ANTLR 4.5.3, Eclipse Neon, ANTLR 4 IDE 0.3.5, and Java 1.8) Download the latest ANTLR. Make sure to get the complete ANTLR Java binaries jar. Save to any appropriate location, for example the folder where other Java libraries are stored. It doesn’t matter where, just remember the loc...

ANTLR • Introduction to ANTLR v4

What does mapreduce do and how?

Mapreduce is a programming model to do processing on (very) large amounts of data. Traditional 'HPC' (High Performance Computing) speeds up large calculations on relatively large amounts of data by creating a set of highly connected computers (using things like extremely quick networking, and quick...

mapreduce • Getting started with mapreduce

Add Hibernate support

Add spring-boot-starter-data-jpa dependency to pom.xml. You may skip version tag, if you are using spring-boot-starter-parent as the parent of your pom.xml. The dependency below brings Hibernate and everything related to JPA to your project (reference). <dependency> <group...

spring-boot • Spring Boot- Hibernate-REST Integration

The generated HTML with automaticaly loaded assets

<!DOCTYPE html> <html lang="en-EN"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <meta name="csrf-param" content="_csrf"> <me...

yii2 • Asset management

Wildcard Handling

When nothing matches a wildcard such as * in bash, it gets passed on as a literal * to the command, as if you had typed \*. However, zsh throws an error. Bash: duncan@K7DXS-Laptop-Arch:~/test$ echo *.txt *.txt duncan@K7DXS-Laptop-Arch:~/test$ touch abc.txt duncan@K7DXS-Laptop-Arch:~/test$ echo...

zsh • Main differences from bash

Routing and HTTP methods

By default, routes only respond to GET requests. You can change this behavior by supplying the methods argument to the route() decorator. from flask import request @app.route('/login', methods=['GET', 'POST']) def login(): if request.method == 'POST': do_the_login() else: ...

Flask • Routing

What is TFS and how Data is stored in it?

Team Foundation Server (commonly abbreviated to TFS) is a Microsoft product that provides source code management (either via Team Foundation Version Control or Git), reporting, requirements management, project management (for both agile software development and waterfall teams), automated builds and...

Team Foundation Server • Getting started with Team Foundation Server

First time setup with blink LED example using SW4STM32 and HAL library

(Note: There are many IDE, toolchain and library which are ready-to-use with STM32. The following setup requires minimal effort to get it work, but it is only one of the many. Feel free to explore others, it is not the purpose of this example to force anyone to use the tools that will be used here.)...

stm32 • Getting started with stm32

Check a word has plural

is_countalbe($string) is use for checking a word has plural form or not. Return type will be boolean means if the given word has plural form it will return true, otherwise will return false. is_countable('book'); // Returns TRUE

codeigniter • Play with English word with INFLECTOR helper

Send HTML Formatted Mail

You can use the same Example above Send Simple Mail with a little modification. Use msg.setContent() instead of msg.setText() and use content type html as text/html. check this msg.setContent(message, "text/html; charset=utf-8"); instead of msg.setText(message);

java-ee • The Javamail API