Tutorial by Examples: r

import flash.utils.*; var intervalId:uint=setInterval(schroedingerCat,1000); // execute a function once per second and gather interval ID trace("Cat's been closed in the box."); function schroedingerCat():void { if (Math.random()<0.04) { clearInterval(intervalId); // ...

Preparation $ mkdir globbing $ cd globbing $ mkdir -p folder/{sub,another}folder/content/deepfolder/ touch macy stacy tracy "file with space" folder/{sub,another}folder/content/deepfolder/file .hiddenfile $ shopt -u nullglob $ shopt -u failglob $ shopt -u dotglob $ shopt -u nocaseg...

AlertDialog is a subclass of Dialog that can display one, two or three buttons. If you only want to display a String in this dialog box, use the setMessage() method. The AlertDialog from android.app package displays differently on different Android OS Versions. The Android V7 Appcompat library pro...

With echo: $ echo Hello, world! Hello, world! With printf: $ printf 'Hello, world!\n' Hello, world! As a file: #!/bin/sh printf '%s\n' 'Hello, world!'

By overloading the indexer you can create a class that looks and feels like an array but isn't. It will have O(1) get and set methods, can access an element at index 100, and yet still have the size of the elements inside of it. The SparseArray class class SparseArray { Dictionary<...

To add EntityFrameworkCore to your project, update the project.json file (add new lines into the dependencies and tools sections): "dependencies": { ... "Microsoft.EntityFrameworkCore.SqlServer": "1.0.0", "Microsoft.EntityFrameworkCore.SqlServer.Des...

One of the most powerful capabilities in Excel is the use of Pivot Tables to sort and analyze data. Using VBA to create and manipulate the Pivots is easier if you understand the relationship of Pivot Tables to Pivot Caches and how to reference and use the different parts of the Tables. At its most ...

These excellent reference sources provide descriptions and illustrations of the various ranges in Pivot Tables. References Referencing Pivot Table Ranges in VBA - from Jon Peltier's Tech Blog Referencing an Excel Pivot Table Range using VBA - from globaliconnect Excel VBA

This example changes/sets several formats in the data range area (DataBodyRange) of the given Pivot Table. All formattable parameters in a standard Range are available. Formatting the data only affects the Pivot Table itself, not the Pivot Cache. NOTE: the property is named TableStyle2 because the ...

Patterns annotated with a bang (!) are evaluated strictly instead of lazily. foo (!x, y) !z = [x, y, z] In this example, x and z will both be evaluated to weak head normal form before returning the list. It's equivalent to: foo (x, y) z = x `seq` z `seq` [x, y, z] Bang patterns are enabled ...

Online REPL The easiest way to get started writing Haskell is probably by going to the Haskell website or Try Haskell and use the online REPL (read-eval-print-loop) on the home page. The online REPL supports most basic functionality and even some IO. There is also a basic tutorial available which c...

A function can be defined using guards, which can be thought of classifying behaviour according to input. Take the following function definition: absolute :: Int -> Int -- definition restricted to Ints for simplicity absolute n = if (n < 0) then (-n) else n We can rearrange it using gua...

Haskell supports pattern matching expressions in both function definition and through case statements. A case statement is much like a switch in other languages, except it supports all of Haskell's types. Let's start simple: longName :: String -> String longName name = case name of ...

Maybe Maybe is a Functor containing a possibly-absent value: instance Functor Maybe where fmap f Nothing = Nothing fmap f (Just x) = Just (f x) Maybe's instance of Functor applies a function to a value wrapped in a Just. If the computation has previously failed (so the Maybe value is ...

const namedMember1 = ... const namedMember2 = ... const namedMember3 = ... export { namedMember1, namedMember2, namedMember3 }

The __import__() function can be used to import modules where the name is only known at runtime if user_input == "os": os = __import__("os") # equivalent to import os This function can also be used to specify the file path to a module mod = __import__(r"C:/path/...

You are right in the middle of working on a new feature, and your boss comes in demanding that you fix something immediately. You may typically want use git stash to store your changes away temporarily. However, at this point your working tree is in a state of disarray (with new, moved, and removed ...

An actor inside Service Fabric is defined by a standard .NET interface/class pair: public interface IMyActor : IActor { Task<string> HelloWorld(); } internal class MyActor : Actor, IMyActor { public Task<string> HelloWorld() { return Task.FromResult(&quot...

A VHDL program can be simulated or synthesized. Simulation is what resembles most the execution in other programming languages. Synthesis translates a VHDL program into a network of logic gates. Many VHDL simulation and synthesis tools are parts of commercial Electronic Design Automation (EDA) s...

Until recently, using android.support.v4.app.FragmentPagerAdapter would prevent the usage of a PreferenceFragment as one of the Fragments used in the FragmentPagerAdapter. The latest versions of the support v7 library now include the PreferenceFragmentCompat class, which will work with a ViewPager ...