Tutorial by Examples: ar

Snackbar vs Toasts: Which one should I use?

Toasts are generally used when we want to display an information to the user regarding some action that has successfully (or not) happened and this action does not require the user to take any other action. Like when a message has been sent, for example: Toast.makeText(this, "Message Sent!&quo...

Android • Snackbar

Importing ArcPy modules

ArcPy is composed of a number of modules: arcpy — the basic functions and geoprocessing tools arcpy.mapping — access to mapping and map document tools arcpy.da — a data access module for working with feature classes and tables arcpy.sa — the Spatial Analyst extension module arcpy.na — the Net...

arcgis • ArcPy

Partial Application and Currying

Technically, Ruby doesn't have functions, but methods. However, a Ruby method behaves almost identically to functions in other language: def double(n) n * 2 end This normal method/function takes a parameter n, doubles it and returns the value. Now let's define a higher order function (or met...

Ruby Language • Blocks and Procs and Lambdas

Multiple Producers and Consumers Sharing the same buffer

This example shows multiple producers and consumers sharing the same buffer. Protected entries in Ada implement a queue to handle waiting tasks. The default queuing policy is First In First Out. ------------------------------------------------------------------ -- Multiple producers and consumers ...

ada • Implementing the producer-consumer pattern

Add a Snackbar

One of the main features in Material Design is the addition of a Snackbar, which in theory replaces the previous Toast. As per the Android documentation: Snackbars contain a single line of text directly related to the operation performed. They may contain a text action, but no icons. Toasts are...

Android • Material Design

Series and Parallel Mapping

map() is a built-in function, which means that it is available everywhere without the need to use an 'import' statement. It is available everywhere just like print() If you look at Example 5 you will see that I had to use an import statement before I could use pretty print (import pprint). Thus ppr...

Python Language • Map Function

Comparing Errorlevel

If Errorlevel 1 ( Echo Errorlevel is 1 or higher REM The phrase "1 or higher" is used because If Errorlevel 1 statement means: REM If %Errorlevel% GEQ 1 REM Not If %Errorlevel% EQU 1 ) ...

batch-file • If statements

If variable exists / set

If Defined Foo ( Echo Foo is defined ) This would check if a variable is defined or not. Again, the Not operator can be used.

batch-file • If statements

Depth First Search

Depth First Traversal (or Search) for a graph is similar to Depth First Traversal of a tree. The only catch here is, unlike trees, graphs may contain cycles, so we may come to the same node again. To avoid processing a node more than once, we use a boolean visited array. Below algorithm presents th...

data-structures • Graph traversals

Writing raw array of bytes

File myFile = new File(getFilesDir(), "myData.bin"); FileOutputStream out = new FileOutputStream(myFile); // Write four bytes one two three four: out.write(new byte [] { 1, 2, 3, 4} out.close() There is nothing Android specific with this code. If you write lots of small ...

Android • FileIO with Android

Writing to external storage (SD card)

You can also read and write from/to memory card (SD card) that is present in many Android devices. Files in this location can be accessed by other programs, also directly by the user after connecting device to PC via USB cable and enabling MTP protocol. Finding the SD card location is somewhat more...

Android • FileIO with Android

Inheritance from Parent Class to Child Class

class ParentClass { [string] $Message = "Its under the Parent Class" [string] GetMessage() { return ("Message: {0}" -f $this.Message) } } # Bar extends Foo and inherits its members class ChildClass : ParentClass { } $Inherit = [ChildClass...

PowerShell • PowerShell Classes

Breadth First Search

Algorithm BFS(G) Input graph G Output labeling of the edges and partition of the vertices of G for all u ∈ G.vertices() setLabel(u, UNEXPLORED) for all e ∈ G.edges() setLabel (e, UNEXPLORED) for all v ∈ G.vertices() if getLabel(v) = UNEXPLORED ...

data-structures • Graph traversals

install the popular Clonezilla to clone a Mac OS hard drive (basic usage)

Naturally, being able to install hard drive cloning utilities can be an important aspect of installing and maintaining your operating system. Getting set up with Clonezilla is surprisingly less straightforward than I'd have expected. The wealth of options, while valuable, also makes each part of id...

operating-system • Getting started with operating-system

Loading ArcGIS JS API CDN

Reference the ArcGIS JavaScript API from our CDN and you are ready to get started:

arcgis • ArcGIS JS API

Accessing variables

In Twig templates variables can be accessed using double curly braces notation {{ variableName }}. Basic example of greeting user <!DOCTYPE html> <html> <body> <span>Hello {{ name }}</span> </body> </html> Accessing array elements Twig as ...

twig • Basic template syntax

Scalar Types

Integers Signed: i8, i16, i32, i64, isize Unsigned: u8, u16, u32, u64, usize The type of an integer literal, say 45, will be automatically inferred from context. But to force it, we add a suffix: 45u8 (without space) will be typed u8. Note: Size of isize and usize depend on the architecture. On ...

Rust • Primitive Data Types

Create a dynamic quartz scheduler programmatically

There are specific scenarios where in we might need to create a Quartz scheduler,based on user input on when a scheduler should be triggered,apart from we can handle cases,where we have certain pre-defined functionalities,which need to be triggered based on user action,at a certain period. This exa...

liferay • Create a Quartz scheduler in liferay

Typical anary tree representation

Typically we represent an anary tree (one with potentially unlimited children per node) as a binary tree, (one with exactly two children per node). The "next" child is regarded as a sibling. Note that if a tree is binary, this representation creates extra nodes. We then iterate over the s...

algorithm • Trees

Using remote by setting the progress bar

const { remote } = require("electron"); // <- The Node.js require() function is // added to JavaScript by electron function setProgress(p) { // p = number from 0 to 1 const currentWindow = remote.getCurrentWindow(); currentWindow.setProgre...

electron • Remote function - use Electron functions in JavaScript