Tutorial by Examples: l

Scala has the following built-in operators (methods/language elements with predefined precedence rules): TypeSymbolExampleArithmetic operators+ - * / %a + bRelational operators== != > < >= <=a > bLogical operators&& & || | !a && bBit-wise operators& | ^ ~ <...

In Scala you can define your own operators: class Team { def +(member: Person) = ... } With the above defines you can use it like: ITTeam + Jack or ITTeam.+(Jack) To define unary operators you can prefix it with unary_. E.g. unary_! class MyBigInt { def unary_! = ... } var ...

!!! Container should be positioned relatively or absolutely $direction - top, bottom, left, right $margin - margin by the edge in $direction. For top and bottom direction - it's from left to right. For left and right - it's from top to bottom. $colors - first is a border color, second - is a back...

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, ...

You can run Theano on multiple CPU cores with the OMP_NUM_THREADS=[number_of_cpu_cores] flag. Example: OMP_NUM_THREADS=4 python gpu_test.py The script theano/misc/check_blas.py outputs information regarding which BLAS is used: cd [theano_git_directory] OMP_NUM_THREADS=4 python theano/misc/ch...

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

Assuming you have already set up an app in Android Studio, add a ListView to a layout (or skip if that's already done): <?xml version="1.0" encoding="utf-8"?> <android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/...

Modal is a temporary UI that is displayed on top of your current page. This is often used for login, signup, editing existing options and selecting options. Let us look in to a simple example with modals used. To begin with we are creating an ionic blank project. Let us create a simple modal displa...

We now know how to create a modal. But what if we want to pass some data from modal to our home page. To do so, let us look into an example with modal as Register page passing parameters to parent page. Register.html <ion-header> <ion-toolbar> <ion-title> Login ...

Passing parameters to a modal is similar to how we pass values to a NavController. To do so, we are altering our list in home.html to open a modal when clicking a list item and passing the required parameters as a second argument to the create method. Home.html <ion-list> <ion-item ...

class my_model(models.Model): _name = "my.model" name = fields.Char('Name') @api.multi def foo_manipulate_records_1(self): """ function returns list of tuples (id,name) """ return [(i.id,i.name) for i in self] @...

Examples below demonstrate how to call Python function from JavaScript in Odoo 8. In the examples we call methods of my_model described early on this page. We assume that in the following examples "list_of_ids" variable contains list(array) of ids of existing records of "my.model&quo...

defmodule MyModule do @my_favorite_number 13 @use_snake_case "This is a string (use double-quotes)" end These are only accessible from within this module.

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...

You can add a method to any class in Ruby, whether it's a builtin or not. The calling object is referenced using self. class Fixnum def plus_one self + 1 end def plus(num) self + num end def concat_one self.to_s + '1' end end 1.plus_one # => 2 3.plus(5) ...

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 ...

If you want to check the existence of one file or do a couple of actions for every file in a folder you can use the Foreach Loop Container. You give the path and the file mask and it will run it for every file it finds

One of the best uses for markup extensions is for easier usage of IValueConverter. In the sample below BoolToVisibilityConverter is a value converter but since it's instance independent it can be used without the normal hasles of a value converter with the help of markup extension. In XAML just use...

There are four predefined markup extensions in XAML: x:Type supplies the Type object for the named type. This facility is used most frequently in styles and templates. <object property="{x:Type prefix:typeNameValue}" .../> x:Static produces static values. The values come from va...