Tutorial by Examples: r

Most Rails developers start by modifying their model information within the template itself: <h1><%= "#{ @user.first_name } #{ @user.last_name }" %></h1> <h3>joined: <%= @user.created_at.in_time_zone(current_user.timezone).strftime("%A, %d %b %Y %l:%M %p&q...

Detailed instructions on getting tizen set up or installed. You can start developing Tizen apps on commercialized devices : https://wiki.tizen.org/wiki/Devices Or https://wiki.tizen.org/wiki/ReferenceDevices Last option is to install Tizen from scratch on existing Hardware (x86, ARM etc) : htt...

Executors returns different type of ThreadPools catering to specific need. public static ExecutorService newSingleThreadExecutor() Creates an Executor that uses a single worker thread operating off an unbounded queue There is a difference between newFixedThreadPool(1) and newSingleThreadE...

DateTime.parse is a very useful method which construct a DateTime from a string, guessing its format. DateTime.parse('Jun, 8 2016') # => #<DateTime: 2016-06-08T00:00:00+00:00 ((2457548j,0s,0n),+0s,2299161j)> DateTime.parse('201603082330') # => #<DateTime: 2016-03-08T23:30:00+00:00...

DateTime + Fixnum (days quantity) DateTime.new(2015,12,30,23,0) + 1 # => #<DateTime: 2015-12-31T23:00:00+00:00 ((2457388j,82800s,0n),+0s,2299161j)> DateTime + Float (days quantity) DateTime.new(2015,12,30,23,0) + 2.5 # => #<DateTime: 2016-01-02T11:00:00+00:00 ((2457390j,39600s,...

Instructions on getting octave set up or installed. Installing Octave for debian systems (Debian, Ubuntu): Simple: sudo apt-get install octave Advanced: Well, if you want to install other external packages sudo apt-get install octave-control octave-image octave-io octave-optim octave-signal oct...

Dojo received a new loader in Dojo 1.7 to accommodate for the toolkit's new AMD module format. This new loader added a few new configuration options that are crucial to defining packages, maps, and more. For details on the loader, see the Advanced AMD Usage tutorial. Important loader configuration p...

Detailed instructions on getting datetime set up or installed.

Start by installing the OS on the MicroSD card, either NOOBS or Raspbian, both provided by the Raspberry Pi foundation, available on their site. NOOBS, which stands for New Out Of Box Software, is designed for beginners, and is the easiest to install on your SD card. You can either follow their offi...

You can achieve a Persistent Bottom Sheet attaching a BottomSheetBehavior to a child View of a CoordinatorLayout: <android.support.design.widget.CoordinatorLayout > <!-- ..... --> <LinearLayout android:id="@+id/bottom_sheet" android:elevation...

You can realize a modal bottom sheets using a BottomSheetDialogFragment. The BottomSheetDialogFragment is a modal bottom sheet. This is a version of DialogFragment that shows a bottom sheet using BottomSheetDialog instead of a floating dialog. Just define the fragment: public class MyBottomSheet...

The Advanced Package Tool, aptly named the 'apt' package manager can handle the installation and removal of software on the Debian, Slackware, and other Linux Distributions. Below are some simple examples of use: update This option retrieves and scans the Packages.gz files, so that information ab...

C# 7.0 allows throwing as an expression in certain places: class Person { public string Name { get; } public Person(string name) => Name = name ?? throw new ArgumentNullException(nameof(name)); public string GetFirstName() { var parts = Name.Split(' '); ...

C# 7.0 adds accessors, constructors and finalizers to the list of things that can have expression bodies: class Person { private static ConcurrentDictionary<int, string> names = new ConcurrentDictionary<int, string>(); private int id = GetId(); public Person(string n...

There are three ways you can access the Unity Asset Store: Open the Asset Store window by selecting Window→Asset Store from the main menu within Unity. Use the Shortcut key (Ctrl+9 on Windows / ⌘9 on Mac OS) Browse the web interface: https://www.assetstore.unity3d.com/ You may be prompted to...

After accessing the Asset Store and viewing the asset you'd like to download, simply click the Download button. The button text may also be Buy Now if the asset has an associated cost. If you are viewing the Unity Asset Store through the web interface, the Download button text may instead display...

After the asset has been downloaded in Unity, the Download or Buy Now button will change to Import. Selecting this option will prompt the user with a Import Unity Package window, where the user may select the asset files of which they'd like to import within their project. Select Import to confirm...

Files: To determine if a file exists, simply pass the filename to the Dir$ function and test to see if it returns a result. Note that Dir$ supports wild-cards, so to test for a specific file, the passed pathName should to be tested to ensure that it does not contain them. The sample below raises an...

NOTE: For brevity, the examples below use the FolderExists function from the Determining If Folders and Files Exist example in this topic. The MkDir statement can be used to create a new folder. It accepts paths containing drive letters (C:\Foo), UNC names (\\Server\Foo), relative paths (..\Foo...

Detailed instructions on getting video-streaming set up or installed.