Tutorial by Examples: a

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

Serializing the object

The old good Java object serialization is available for you in Android. you can define Serializable classes like: class Cirle implements Serializable { final int radius; final String name; Circle(int radius, int name) { this.radius = radius; this.name = name; }...

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

Example 1

Say you have the string s = 'AAAABBBCCDAABBB' and you would like to split it so all the 'A's are in one list and so with all the 'B's and 'C', etc. You could do something like this s = 'AAAABBBCCDAABBB' s_dict = {} for i in s: if i not in s_dict.keys(): s_dict[i] = [i] els...

Python Language • groupby()

Example 2

This example illustrates how the default key is chosen if we do not specify any c = groupby(['goat', 'dog', 'cow', 1, 1, 2, 3, 11, 10, ('persons', 'man', 'woman')]) dic = {} for k, v in c: dic[k] = list(v) dic Results in {1: [1, 1], 2: [2], 3: [3], ('persons', 'man', 'woman'): [('...

Python Language • groupby()

Example 3

Notice in this example that mulato and camel don't show up in our result. Only the last element with the specified key shows up. The last result for c actually wipes out two previous results. But watch the new version where I have the data sorted first on same key. list_things = ['goat', 'dog', 'do...

Python Language • groupby()

Example 4

In this example we see what happens when we use different types of iterable. things = [("animal", "bear"), ("animal", "duck"), ("plant", "cactus"), ("vehicle", "harley"), \ ("vehicle", "speed b...

Python Language • groupby()

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

The Lambda operator ( -> )

From Java 8 onwards, the Lambda operator ( -> ) is the operator used to introduce a Lambda Expression. There are two common syntaxes, as illustrated by these examples: Java SE 8 a -> a + 1 // a lambda that adds one to its argument a -> { return a + 1; } // an equivalen...

Java Language • Operators

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

Master (HEAD)

index.html: <html ng-app="masterAngularMaterial"> <head>  <meta name="viewport" content="width=device-width, initial-scale=1">  ...

angular-material • Getting started with angular-material

Creating an icon button

This example will be using the class md-icon-button, which must be applied to <md-button> in order to get an icon button. It is also recommended to add an aria-label attribute to <md-button> for accessibility purpose or the ARIA provider will throw a warning that there is no aria-labe...

angular-material • md-button

Loading ArcGIS JS API CDN

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

arcgis • ArcGIS JS API

Loading Map

require(["esri/map", "dojo/domReady!"], function(Map) { var map = new Map("map", { center: [-118, 34.5], zoom: 8, basemap: "topo" }); });

arcgis • ArcGIS JS API

Loading ESRI CSS

Starting with version 3.2 of the ArcGIS API for JavaScript, developers must include an additional Cascading Style Sheet (CSS) file: esri.css. The URL for this file is: // versions 3.11 and forward <link rel="stylesheet" href="https://js.arcgis.com/API-VERSION/esri/css/esri.css&...

arcgis • ArcGIS JS API

Loading Dojo specific CSS

The esri.css file does not include the CSS for various Dojo widgets or themes like tundra or claro; those files must be included separately. Exceptions are the Grid and RangeSlider, which are used by widgets in the API. Grid styles must be explicitly included. For instance, this CSS file would be i...

arcgis • ArcGIS JS API

Use generics to enhance type-safety

Let's take this example without using generics protocol JSONDecodable { static func from(_ json: [String: Any]) -> Any? } The protocol declaration seems fine unless you actually use it. let myTestObject = TestObject.from(myJson) as? TestObject Why do you have to cast the result to T...

Swift Language • Generics

Basic test

import { BrowserModule } from '@angular/platform-browser'; import { CommonModule } from '@angular/common'; import { FormsModule } from '@angular/forms'; import { HttpModule } from '@angular/http'; import { Component, DebugElement } from '@angular/core'; import { dispatchEvent } from "@an...

Angular 2 • Testing ngModel

Basic Query

/* Define a query named q1 for the Customer table */ DEFINE QUERY q1 FOR Customer. /* Open the query for all Customer records where the state is "tx" */ OPEN QUERY q1 FOR EACH Customer WHERE Customer.state ='TX'. ...

progress-4gl • Queries