Tutorial by Examples: e

Strict-Transport-Security: max-age=31536000; includeSubDomains Strict-Transport-Security is a promise to the browser that all future requests to this domain will be secure. For the future time period max-age: All outgoing HTTP requests from the browser will be converted to HTTPS on the client...

Strict-Transport-Security: max-age=31536000; includeSubDomains; preload HSTS is activated only after a successful HTTPS request to the server with a valid certificate. There is still a risk of a first-time user accessing the site, at which point a Man-in-the-Middle attack is possible. To make th...

export class MyViewModel { selectedFiles; } <template> <input type="file" files.bind="selectedFiles"> </template>

Strings Array When selecting a value in the select dropdown and providing an array of strings, the selected value will be bound to the select element's value property as a string that we can display using string interpolation. export class MyViewModel { animals = []; favouriteAnimal = nu...

Basic Checkboxes export class MyViewModel { favoriteColors = []; colors = ['Red', 'Yellow', 'Pink', 'Green', 'Purple', 'Orange', 'Blue']; } <template> <label repeat.for="color of colors"> <input type="checkbox" value.bind="color" ch...

Binding to the browser native style attribute using Aurelia. If using string interpolation, you should use the css alias so styling works in Internet Explorer. Style String export class MyViewModel { constructor() { this.styleString = 'color: #F2D3D6; background-color: #333'; } } &l...

When using show.bind the element remains in the page and is either hidden or visible through the use of display:none or display:block behind the scenes. export class MyViewModel { isVisible = false; } <template> <div show.bind="isVisible"><strong>I can be b...

Unlike show.bind when using if.bind the element will be removed from the page if the supplied binding value is false or added into the page if the value is true. export class MyViewModel { isVisible = false; } <template> <div if.bind="isVisible"><strong>If ...

Everything you need to get started with Django admin is already setup in Django's default project layout. This includes: # settings.py # `django.contrib.admin` and its dependancies. INSTALLED_APPS = [ 'django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes',...

Create a server.js file with the following contents: 'use strict'; const Hapi = require('hapi'); // Create a server instance const server = new Hapi.Server(); // Specify connections (server available on http://localhost:8000) server.connection({ port: 8000 }); // Add a route ...

Detailed instructions on getting django-cms set up or installed.

The following are the steps to start an Eclipse remote debugger. This is useful when the application is not started from a server instance within Eclipse. This feature is really powerful and can also help debugging code which resides in the test or production environment. Let's have a look at the se...

Setup your view controller to manage editing of text for the text field. class MyViewController: UITextFieldDelegate { override viewDidLoad() { super.viewDidLoad() textField.delegate = self } } textFieldShouldReturn is called every time the return butto...

Detailed instructions on getting android-intent set up or installed.

Instructs the engine to use hash method to join tables in the argument. Usage : use_hash(TableA [TableB] ... [TableN]) As explained in many places, "in a HASH join, Oracle accesses one table (usually the smaller of the joined results) and builds a hash table on the join key in memory. It the...

Create Oracle error log table ERR$_EXAMPLE for existing EXAMPLE table: EXECUTE DBMS_ERRLOG.CREATE_ERROR_LOG('EXAMPLE', NULL, NULL, NULL, TRUE); Make writing operation with SQL: insert into EXAMPLE (COL1) values ('example') LOG ERRORS INTO ERR$_EXAMPLE reject limit unlimited;

The difference in months between two dates can be found using the MONTHS_BETWEEN( date1, date2 ): SELECT MONTHS_BETWEEN( DATE '2016-03-10', DATE '2015-03-10' ) AS difference FROM DUAL; Outputs: DIFFERENCE ---------- 12 If the difference includes part months then it will return the ...

Query: WITH generator ( value ) AS ( SELECT 1 FROM DUAL UNION ALL SELECT value + 1 FROM generator WHERE value < 10 ) SELECT value FROM generator; Output: VALUE ----- 1 2 3 4 5 6 7 8 9 10

Sample Data: CREATE TABLE table_name ( value VARCHAR2(50) ); INSERT INTO table_name ( value ) VALUES ( 'A,B,C,D,E' ); Query: WITH items ( list, item, lvl ) AS ( SELECT value, REGEXP_SUBSTR( value, '[^,]+', 1, 1 ), 1 FROM table_name UNION ALL SELECT value, ...

For creating new user, We need to follow simple steps as below : Step 1: Login to MySQL as root $ mysql -u root -p Step 2 : We will see mysql command prompt mysql> CREATE USER 'my_new_user'@'localhost' IDENTIFIED BY 'test_password'; Here, We have successfully created new user, But this u...