Tutorial by Examples: b

The Java Language Specification describes Annotations as follows: An annotation is a marker which associates information with a program construct, but has no effect at run time. Annotations may appear before types or declarations. It is possible for them to appear in a place where they could a...

A thing to look out for when using the toString method in Kotlin is the handling of null in combination with the String?. For example you want to get text from an EditText in Android. You would have a piece of code like: // Incorrect: val text = view.textField?.text.toString() ?: "" ...

You can use the following instructions to install Theano and configure the GPU (assume a freshly installed Ubuntu 14.04): # Install Theano sudo apt-get install python-numpy python-scipy python-dev python-pip python-nose g++ libopenblas-dev git sudo pip install Theano # Install Nvidia drivers, ...

vagrant ssh

vagrant ssh-config >> ~/.ssh/config ssh default

Define a Target (Target2) for which an execution request will cause Target1 to be executed beforehand. <Target Name="Target2"> </Target> <Target Name="Target1" BeforeTargets="Target2"> </Target>

A basic reducer would look like this: // Import the action types to recognise them import { ACTION_ERROR, ACTION_ENTITIES_LOADED, ACTION_ENTITY_CREATED } from './actions'; // Set up a default state const initialState = { error: undefined, entities: [] }; // If no state is provi...

Immutable is a great library that provides us with immutable versions of widely used types of collections, such as Lists, Stacks, Maps, and more. It simplifies the manipulation of the state and makes it easier to make pure calculations and avoid mutation. Let's see how the Basic reducer can be rew...

Objective: Use SignalR for notification between Web API, and TypeScript/JavaScript based Web App, where Web API and the Web App is hosted in different domain. Enabling SignalR and CORS on Web API: Create a standard Web API project, and install the following NuGet packages: Microsoft.Owin.Cors ...

This line of code demonstrate how to check if a specific field is NULL or has blank value =IIF(IsNothing(Fields!UserEmail.Value) OR Fields!UserEmail.Value = "", "Empty", "Not Empty") This line of code checks if the field is NULL IsNothing(Fields!UserEmail.Value) ...

A path through every vertex exactly once is the same as ordering the vertex in some way. Thus, to calculate the minimum cost of travelling through every vertex exactly once, we can brute force every single one of the N! permutations of the numbers from 1 to N. Psuedocode minimum = INF for all per...

// this is the static platform browser, the usual counterpart is @angular/platform-browser-dynamic. import { platformBrowser } from '@angular/platform-browser'; // this is generated by the angular compiler import { AppModuleNgFactory } from './ngfactory/app/app.module.ngfactory'; // note the...

Label label = new Label { Text = "text" }; if(Device.OS == TargetPlatform.iOS) { label.FontSize = label.FontSize - 2; }

Makes entering numbers a bit handier by showing a set of arrows on the right side of the input. HTML <link rel="stylesheet" href="//code.jquery.com/ui/1.12.0/themes/base/jquery-ui.css"> <script src="https://code.jquery.com/jquery-1.12.4.js"></script&gt...

Html: <nav class="navbar navbar-defalt" data-offset-top="120" data-spy="affix" > ... </nav> Css: <style> .navbar { background-color: red; } .navbar.affix { background-color: green; } </style>

HTML Tag: Tag attributes look similar to html, however their values are just regular JavaScript. a(href='google.com') Google a(class='button', href='google.com') Google Result: <a href="google.com">Google</a><a href="google.com" class="button">G...

By default, all attributes are escaped (replacing special characters with escape sequences) to prevent attacks such as cross site scripting. If you need to use special characters you can use != instead of =. Code: div(escaped="<code>") div(unescaped!="<code>") R...

Boolean attributes are mirrored by Jade, and accept bools, aka true or false. When no value is specified true is assumed. Code: input(type='checkbox', checked) input(type='checkbox', checked=true) input(type='checkbox', checked=false) input(type='checkbox', checked=true.toString()) Result: ...

The style attribute can be a string (like any normal attribute) but it can also be an object, which is handy when parts of the style are generated by JavaScript. Code: a(style={color: 'red', background: 'green'}) Result: <a style="color:red;background:green"></a>

The class attribute can be a string (like any normal attribute) but it can also be an array of class names, which is handy when generated from JavaScript. Code: - var classes = ['foo', 'bar', 'baz'] a(class=classes) //- the class attribute may also be repeated to merge arrays a.bing(class=class...