Tutorial by Examples: l

Solving "Invisible MTP files" problem.

If you create files for exporting via USB cable to desktop using MTP protocol, may be a problem that newly created files are not immediately visible in the file explorer running on the connected desktop PC. To to make new files visible, you need to call MediaScannerConnection: File file = new File(...

Android • FileIO with Android

Working with big files

Small files are processed in a fraction of second and you can read / write them in place of the code where you need this. However if the file is bigger or otherwise slower to process, you may need to use AsyncTask in Android to work with the file in the background: class FileOperation extends A...

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

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

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

Multi-Tables Query

This query will join three tables: Customer, Order and Orderline. The use of the OF statement as in childtable OF parenttable assumes that indexes are constructed in a specific way. That is the case in the sports2000-database. DEFINE QUERY q1 FOR Customer, Order, Orderline. OPEN QUERY q1 FOR EA...

progress-4gl • Queries

Installation and Setup

Keras is a high-level neural networks library, written in Python and capable of running on top of either TensorFlow or Theano. It was developed with a focus on enabling fast experimentation. Being able to go from idea to result with the least possible delay is key to doing good research. Use Keras ...

keras • Getting started with keras

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

Filters

Variables can be modified using filters. To apply filter to variable follow variable name with pipe | and filter name: {{ variable|filterName }} For example to display variable value in uppercase use construct. {{ variable|upper }} Filters can be parametrized. Filter parameters are passed in...

twig • Basic template syntax

Tutorial by Examples: l

Solving "Invisible MTP files" problem.

Working with big files

Example 1

Example 2

Example 3

Example 4

Inheritance from Parent Class to Child Class

The Lambda operator ( -> )

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

Loading ArcGIS JS API CDN

Loading Map

Loading ESRI CSS

Loading Dojo specific CSS

Multi-Tables Query

Installation and Setup

Accessing variables

Filters

Find a PowerShell module using a pattern

Create the default PowerShell Module Reposity

Find a module by name