Tutorial by Examples: v

A Layout that uses Constraints to layout its children. RelativeLayout is used to position and size views relative to properties of the layout or sibling views. Unlike AbsoluteLayout, RelativeLayout does not have the concept of the moving anchor and does not have facilities for positioning elements ...

Authentication can be set for an specific APIView endpoint, by using the authentication_classes variable: from rest_framework.authentication import SessionAuthentication, BasicAuthentication from rest_framework.permissions import IsAuthenticated from rest_framework.response import Response ...

The most interesting package for managing real tokens is django-rest-knox which supports multiple tokens per user (and cancelling each token independently), as well as having support for token expiration and several other security mechanisms. django-rest-knox depends on cryptography. You can find m...

Angular 2 has two kinds of custom validators. Synchronous validators as in the first example that will run directly on the client and asynchronous validators (the second example) that you can use to call a remote service to do the validation for you. In this example the validator should call the ser...

constructor(fb: FormBuilder) { this.form = fb.group({ firstInput: ['', Validators.compose([Validators.required, CustomValidators.cannotContainSpace]), CustomValidators.shouldBeUnique], secondInput: ['', Validators.required] }); } Here we use the FormBuilder to crea...

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An AWS-Lambda function can be attached to a certain bucket event. Whenever a file/folder is created or removed, an event can trigger lambda function execution. A simple Lambda function to print the name of an uploaded File This is a one class lambda project to print the name of an uploaded file. ...

using System; namespace ConsoleApplication1 { class Program { static void Main(string[] args) { var foo = new ClassWithDependency(); foo.DoSomething(); var bar = new InjectedDependency(); foo.Dependency = bar; ...

using System; namespace ConsoleApplication1 { class Program { static void Main(string[] args) { var dep = new DefaultDependency(); var foo = new ClassWithDependency(dep); foo.DoSomething(); var bar = new Injected...

Sample test dataset CSV file stored at the location c:\Users\yc03ak1\Desktop\testing.csv _id city loc pop state 1 A [10.0, 20.0] 2222 PQE 2 B [10.1, 20.1] 22122 RW 3 C [10.2, 20.0] 255222 RWE 4 D [10.3, 20.3] 226622 SFDS 5 E [10...

Data with header, separated by semicolons instead of commas file: table.csv index;name;occupation 1;Alice;Saleswoman 2;Bob;Engineer 3;Charlie;Janitor code: import pandas as pd pd.read_csv('table.csv', sep=';', index_col=0) output: name occupation index 1 Alice Sale...

When it comes to validate some rules which are not generic data validation e.g ensuring a field is required or some range of values but they are specific to your business logic then you can create your own Custom Validator. To create a custom validation attribute, you just need to inherit Validation...

In the example we will start tomcat 7 using maven plugin, optionally add user/password protection for REST end point. Also adding feature of building war. Add below section in plugin section of pom for tomcat <plugin> <groupId>org.apache.tomcat.maven</g...

The following example demonstrates the concept of storing view state. Let us keep a counter, which is incremented each time the page is posted back by clicking a button on the page. A label control shows the value in the counter. The markup file code is as follows: <%@ Page Language="C#&qu...

val and var scala> val a = 123 a: Int = 123 scala> a = 456 <console>:8: error: reassignment to val a = 456 scala> var b = 123 b: Int = 123 scala> b = 321 b: Int = 321 val references are unchangeable: like a final variable in Java, once it has been initial...

To start with App Development we need Visual studio 2013 or higher version. Download latest community or expression edition from here > https://www.visualstudio.com/products/free-developer-offers-vs Once it has been downloaded and installed Open and Click create new project expand Office...

Once we have visual studio, we need a developer site to deploy apps to SharePoint. Simplest way is to get is > Sign up for a free, one year Office 365 developer account https://profile.microsoft.com/RegSysProfileCenter/wizardnp.aspx?wizid=14b845d0-938c-45af-b061-f798fbb4d170&lcid=1033 Once ...

Lets start with creating our first app Open visual studio and > create new project Enter Name and Location Enter your developer site url created in previous step and select Provider-hosted Popup will open which will as for login Next step it will as for type of applicatio...

QVector<T> provides dynamic array template class. It provides better performance in most cases than QList<T> so it should be first choice. It can be initialized in various ways: QVector<int> vect; vect << 1 << 2 << 3; QVector<int> v {1, 2, 3, 4}; Th...

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