Tutorial by Examples: i

Django REST Framework has some authentication methods already built in, one of them is Token based, so first thing to do is to tell our project we’re going to use rest framework’s authentication. Open settings.py file and add the highlighted line. INSTALLED_APPS = ( 'django.contrib.admin', ...

Token authentication functionality assigns a token to a user, so each time you use that token, the request object will have a user attribute that holds the user model information. Easy, isn’t it? We’ll create a new POST method to return the token for this user, as long as the request holds a correc...

Let’s create a new View that requires this authentication mechanism. We need to add these import lines: from rest_framework.authentication import TokenAuthentication from rest_framework.permissions import IsAuthenticated and then create the new View in the same views.py file class AuthView(AP...

If a curl would be run against this endpoint curl http://localhost:8000/auth/ op : {"detail": "Authentication credentials were not provided."}% would return a 401 error UNAUTHORIZED but in case we get a token before: curl -X POST -d "user=Pepe&password=aaaa&qu...

Components let you split the UI into independent, reusable pieces. This is the beauty of React; we can separate a page into many small reusable components. Prior to React v14 we could create a stateful React component using React.Component (in ES6), or React.createClass (in ES5), irrespective of wh...

Access modifiers are used to control the access to an object or to a function/method. This is a main part of the concept of Abstraction. Different programming languages use different access modifiers. Here are some examples: Java Java has 4 access modifiers. private - These attributes can ...

use Time::HiRes qw( time ); my $start = time(); #Code for which execution time is calculated sleep(1.2); my $end = time(); printf("Execution Time: %0.02f s\n", $end - $start); This will print execution time of Code in seconds

<div class="row"> <div class="col-sm-9"> Level 1: .col-sm-9 <div class="row"> <div class="col-xs-8 col-sm-6"> Level 2: .col-xs-8 .col-sm-6 </div> <div class="col-xs-4 col-sm-6&quo...

If you want to take a screenshot of a particular View v, then you can use the following code: Bitmap viewBitmap = Bitmap.createBitmap(v.getWidth(), v.getHeight(), Bitmap.Config.RGB_565); Canvas viewCanvas = new Canvas(viewBitmap); Drawable backgroundDrawable = v.getBackground(); if(backgroundD...

If you installed Laravel via Composer or the Laravel installer, below configuration you will need. Configuration for Apache Laravel includes a public/.htaccess file that is used to provide URLs without the index.php front controller in the path. Before serving Laravel with Apache, be sure to enabl...

Detailed instructions on getting cpanel set up or installed.

The first code block is written in Bootstrap 3. In Bootstrap 3 there are 4 types of column specifications, namely col-md-* col-lg-* col-sm-* col-xs-* . A fully responsive layout will look like this in Bootstrap 3: <div class="row"> <div class="col-lg-4 col-md-8 col-sm-8...

You can list all of the keys in a Redis database by executing the following commands from redis-cli: KEYS * The parameter to KEYS is a glob-style pattern matching expression. Examples of suppored patterns include: h?llo matches hello, hallo and hxllo h*llo matches hllo and heeeello h[ae]llo ...

Affix is removed from Bootstrap 4. It is recommended to use a position: sticky polyfill instead. If you were using Affix to apply additional, non-position styles, the polyfills might not support your use case. One option for such uses is the third-party ScrollPos-Styler library. According to Boot...

The following example shows how the master can receive data from multiple slaves. In this example the slave sends two short numbers. The first one is for temperature, and the second one is for moisture. Please notice that the temperature is a float (24.3). In order to use only two bytes and not fo...

Below give solution can be also use in another supported programming languages with some syntax changes To do Scroll down page/section/division in webpage while there is custom scroll bar(Not browser scroll). Click Here For demo and check scroll bar has its independent element. In belo...

In this example we define a package header and a package body wit a function. After that we are calling a function from the package that return a return value. Package header: CREATE OR REPLACE PACKAGE SkyPkg AS FUNCTION GetSkyColour(vPlanet IN VARCHAR2) RETURN VARCHAR2; ...

This examples uses the AES algorithm for encrypting passwords. The salt length can be up to 128 bit. We are using the SecureRandom class to generate a salt, which is combined with the password to generate a secret key. The classes used are already existing in Android packages javax.crypto and java....

Detailed instructions on getting service-worker set up or installed.

If you want to loop over a list of tuples for example: collection = [('a', 'b', 'c'), ('x', 'y', 'z'), ('1', '2', '3')] instead of doing something like this: for item in collection: i1 = item[0] i2 = item[1] i3 = item[2] # logic or something like this: for item in collec...