Tutorial by Examples: b

Drag a gesture recognizer from the object library onto your view. Control drag from the gesture in the Document Outline to your View Controller code in order to make an Outlet and an Action. Notes This example comes from this fuller sample project demonstrating gesture recognizers.

//Creates a Random instance with a seed of 12345. Random random = new Random(12345L); //Gets a ThreadLocalRandom instance ThreadLocalRandom tlr = ThreadLocalRandom.current(); //Set the instance's seed. tlr.setSeed(12345L); Using the same seed to generate random numbers will return the sa...

Time series data can be stored as a ts object. ts objects contain information about seasonal frequency that is used by ARIMA functions. It also allows for calling of elements in the series by date using the window command. #Create a dummy dataset of 100 observations x <- rnorm(100) #Convert ...

Bytecode is the set of instructions used by the JVM. To illustrate this let's take this Hello World program. public static void main(String[] args){ System.out.println("Hello World"); } This is what it turns into when compiled into bytecode. public static main([Ljava/lang/String...

Objects come in their own class, so a simple example would be a car (detailed explanations below): public class Car { //Variables describing the characteristics of an individual car, varies per object private int milesPerGallon; private String name; private String color; ...

To write data to a file using Channel we need to have the following steps: First, we need to get an object of FileOutputStream Acquire FileChannel calling the getChannel() method from the FileOutputStream Create a ByteBuffer and then fill it with data Then we have to call the flip() method of ...

When you run sails lift with blueprints enabled, the framework inspects your controllers, models, and configuration in order to bind certain routes automatically. These implicit blueprint routes allow your app to respond to certain requests without you having to bind those routes manually in your ...

Blueprint actions (not to be confused with blueprint action routes) are generic actions designed to work with any of your controllers that have a model of the same name (e.g. ParrotController would need a Parrot model). Think of them as the default behavior for your application. For instance, if...

Global basis: Blueprint API configuration is defined in /config/blueprint.js file. You can enable or disable all three types of blueprint routes for all controllers from there. As example, if you want to disable blueprint shortcut routes for all of your controllers but want to keep both acti...

To print the value of a pointer to an object (as opposed to a function pointer) use the p conversion specifier. It is defined to print void-pointers only, so to print out the value of a non void-pointer it needs to be explicitly converted ("casted*") to void*. #include <stdlib.h> /*...

Sometimes we need to fetch and print the value of a TensorFlow variable to guarantee our program is correct. For example, if we have the following program: import tensorflow as tf import numpy as np a = tf.Variable(tf.random_normal([2,3])) # declare a tensorflow variable b = tf.random_normal([2...

Create a select list that can be used to choose a single or multiple items from a list of values. library(shiny) ui <- fluidPage( selectInput("id_selectInput", label = HTML('<B><FONT size="3">What is your favorite color ?</FONT></B&g...

When dealing with an unbalanced design and/or non-orthogonal contrasts, Type II or Type III Sum of Squares are necessary. The Anova() function from the car package implements these. Type II Sum of Squares assumes no interaction between main effects. If interactions are assumed, Type III Sum of Squar...

The current frame rate (in FPS, Frames Per Second) and total number of SKNodes in the scene (nodeCount, each sprite is an SKNode but other objects in the scene are also SKNodes) can be shown in the bottom right hand corner of the view. These can be useful when turned on (set to true) for debugging ...

An SKView does not need to fill the whole screen and can share space with other UI controls. You can even have more than one SKView displayed at once if you wish. To create a smaller SKView amongst other controls with Interface Builder, first create a normal ViewController, then drag and drop a new...

When a function returns an object (as opposed to using one that's passed in by the caller), be careful an exception doesn't cause the object to leak. function MakeStrings: TStrings; begin // Create a new object before entering the try-block. Result := TStringList.Create; try // Execu...

In Tcl itself, a string consisting of a single word does not need to be quoted. In the language of expression strings that expr evaluates, all operands must have an identifiable type. Numeric operands are written without any decoration: expr {455682 / 1.96e4} So are boolean constants: expr {tr...

Navigation controller can be embed in each tabs using storyboard it self. It can be like in the screenshot added. To add a Navigation Controller to a View Controller connecting from Tab Bar Controller, here are the flow Select the view controller for which we need to add navigation controller. H...

Consider following html code <ul> <li id=“one” class=“main”>Item 1</li> <li id=“two” class=“main”>Item 2</li> <li id=“three” class=“main”>Item 3</li> <li id=“four”>Item 4</li> </ul> Following dom tree will be constructed ba...

In order to print the value of a variable such as, set tempVar "This is a string." The argument in the puts statement is preceded by a $ sign, which tells Tcl to use the value of the variable. % set tempVar "This is a string." This is a string. % puts $tempVar This is a s...