Tutorial by Examples: is

To enable disk persistence you should enable the flag persistenceEnabled in the FirebaseDatabaseInstance object of your application: Android FirebaseDatabase.getInstance().setPersistenceEnabled(true); iOS Database.database().isPersistenceEnabled = true //Swift [FIRDatabase database].persisten...

Many repetitive jobs can be performed more efficiently if you utilize more of your computer's resources (i.e. CPU's and RAM). Below is an example of running multiple jobs in parallel. Suppose you have a < list of files >, say output from ls. Also, let these files are bz2 compressed and the fo...

To get the list of Elixir modules just type h Elixir.[TAB] Pressing [TAB] autocompletes modules and functions names. In this case it lists all modules. To find all functions in a module e.g. List use h List.[TAB]

The PXTimeList attribute is designed to work with a DAC field of the Nullable<int> (int?) type and store time span value inside a DAC field as a number of minutes: #region UsrTimeSpan public abstract class usrTimeSpan : IBqlField { } [PXDBInt] [PXTimeList] [PXUIField(DisplayName = &quo...

This returns a map without the key-value pairs for the keys mentioned in the function argument. It can be used to remove information from existing map. (dissoc {:a 1 :b 2} :a) ;; {:b 2} It can also be used for dissocing multiple keys as: (dissoc {:a 1 :b 2 :c 3} :a :b) ;; {:c 3}

Sometimes the download takes longer than the cell is being displayed. In this case it can happen, that the downloaded image is shown in the wrong cell. To fix this we can not use the UIImageView Extension. We still will be using Alamofire however we will use the completion handler to display the im...

You can copy and paste this whole plugin to try it. The class skeleton is used from here. class-oop-ajax.cpp <?php /** * The plugin bootstrap file * * This file is read by WordPress to generate the plugin information in the plugin * Dashboard. This file defines a function that start...

using (SPSite site = new SPSite("http://server/sites/siteCollection")) using (SPWeb web = site.OpenWeb()) { SPList list = web.Lists["Some list"]; // It is always better and faster to query list items with GetItems method with // empty SPQuery object than to use...

using (SPSite site = new SPSite("http://server/sites/siteCollection")) using (SPWeb web = site.OpenWeb()) { string listUrl = string.Format("{0}{1}", web.ServerRelativeUrl, "Lists/SomeList"); SPList list = web.GetList(listUrl); }

When creating a new list item, its fields can be set using syntax similar to string arrays. Note that these fields are not created on the fly and are defined by the schema of the list. These fields (or columns) must exist on the server otherwise the create will fail. All list items will have the Tit...

Usecase : Login to FB account import org.openqa.selenium.WebDriver; import org.openqa.selenium.firefox.FirefoxDriver; import org.testng.annotations.BeforeClass; import org.testng.annotations.Test; public class FaceBookLoginTest { private static WebDriver driver; HomePage homePage; ...

Cold observable implementation, emits true when TTS engine finishes speaking, starts speaking when subscribed. Notice that API level 21 introduces different way to perform speaking: public class RxTextToSpeech { @Nullable RxTTSObservableOnSubscribe audio; WeakReference<Context> contextR...

The rule Another common case we usually find and where it is useful to apply this technique are progressive rates based on values. An e-commerce has an offer that is like: 10% off for orders above US$ 80.00 15% off for orders above US$ 150.00 25% off for orders above US$ 200.00 How to appl...

ADDITIONAL_LOAD_PATHS ARGF ARGV ActionController ActionView ActiveRecord ArgumentError Array BasicSocket Benchmark Bignum Binding CGI CGIMethods CROSS_COMPILING Class ClassInheritableAttributes Comparable ConditionVariable Config Continuation DRb DRbIdConv DRbObject DRbUndu...

function sum(numbers) { var total = 0; for (var i = numbers.length - 1; i >= 0; i--) { total += numbers[i]; } return total; } It's a procedural code with mutations (over total).

<div ng-app="MainApp" ng-controller="SampleController"> <input ng-model="dishName" id="search" class="form-control" placeholder="Filter text"> <ul> <li dir-paginate="dish in dishes | filter : di...

To start a new project in Visual Studio 2010: Click File Menu Select Project Next, we have project types and available languages listed : Select Languages available from left most panel [Below we have languages like Visual C#, VB, F# etc] Once we select languages from installed template...

Open Visual Studio and select File Menu -> Open -> Project Next, select Solution File from project folder Project files will be shown in Solution Explorer.

File Commands File.NewProject : CTRL + SHIFT + N Displays the New Project dialog box. File.OpenProject: CTRL + SHIFT + O Displays the Open Project dialog box, where existing projects can be added to the solution. Project.AddClass: SHIFT + ALT + C Displays the Add N...