Tutorial by Examples: ast

Master Detail Navigation

The code below shows how to perform asynchronous navigation when the app is in a MasterDetailPage context. public async Task NavigateMasterDetail(Page page) { if (page == null) { return; } var masterDetail = App.Current.MainPage as Mas...

Xamarin.Forms • Navigation in Xamarin.Forms

Define a step value of 7

<RangeSeekBar android:id="@+id/barPrice" android:layout_width="fill_parent" android:layout_height="wrap_content" app:barHeight="0.2dp" app:barHeight2="4dp" app:increment="7" ...

Android • Define step value (increment) for custom RangeSeekBar

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

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

asterisk installation on CentOS 6.X

Asterisk is an open source framework for building communications applications. You can use it for any of the following: IP PBX systems VoIP gateways ISDN/ 3G IVVR Here is a brief instruction for step by step installation of asterisk 1.8(or you can do for latest versions) on Redhat/centos (fo...

Asterisk • Getting started with Asterisk

Code for Calculating File Hash in a Standard module

Private Const HashTypeMD5 As String = "MD5" ' https://msdn.microsoft.com/en-us/library/system.security.cryptography.md5cryptoserviceprovider(v=vs.110).aspx Private Const HashTypeSHA1 As String = "SHA1" ' https://msdn.microsoft.com/en-us/library/system.security.cryptography.sha1c...

VBA • Reading 2GB+ files in binary in VBA and File Hashes

LAST_VALUE

The LAST_VALUE function provides the last value in an ordered result set, which you specify using a scalar expression. SELECT TerritoryID, StartDate, BusinessentityID, LAST_VALUE(BusinessentityID) OVER(ORDER BY TerritoryID) AS LastValue FROM SalesTerritoryHistory; This example...

SQL • Functions (Analytic)

Moving poisition withing a query using next, first, prev and last

DEFINE QUERY q1 FOR Customer. OPEN QUERY q1 FOR EACH Customer. GET FIRST q1. loop: REPEAT: IF AVAILABLE Customer THEN DO: DISPLAY Customer.NAME CustNum WITH FRAME frClient TITLE "Client data". DISPLAY "(P)revious" SKIP ...

progress-4gl • Queries

Defining, assing and displaying a string

Generally you should always define all variable and parameters as NO-UNDO unless you really need to. DEFINE VARIABLE cString AS CHARACTER NO-UNDO. cString = "HELLO". DISPLAY cString.

progress-4gl • Strings

Type casting in Swift Language

Type Casting Type casting is a way to check the type of an instance, or to treat that instance as a different superclass or subclass from somewhere else in its own class hierarchy. Type casting in Swift is implemented with the is and as operators. These two operators provide a simple and express...

Swift Language • Type Casting

Hive Installation with External Metastore in Linux

Pre-requisites: Java 7 Hadoop (Refer here for Hadoop Installation) Mysql Server and Client Installation: Step 1: Download the latest Hive tarball from the downloads page. Step 2: Extract the downloaded tarball (Assumption: The tarball is downloaded in $HOME) tar -xvf /home/username/apache...

hive • Getting started with hive

Create And Write To A Stream

The subtypes' stream-oriented attributes are called to write objects to a file, bare and using binary default representations. with Ada.Streams.Stream_IO; procedure Main is type Fruit is (Banana, Orange, Pear); type Color_Value is range 0 .. 255; type Color is record R, G, B :...

ada • Files and I/O streams

MD5 hash of a string

This module implements a common interface to many different secure hash and message digest algorithms. Included are the FIPS secure hash algorithms SHA1, SHA224, SHA256, SHA384, and SHA512 (defined in FIPS 180-2) as well as RSA’s MD5 algorithm (defined in Internet RFC 1321). There is one constructo...

Python Language • hashlib

Date and time strings to numeric array fast

Converting date and time strings to numeric arrays can be done with datenum, though it may take as much as half the time of reading a large data file. Consider the data in example Textscan. By, again, using textscan and interpret date and time as integers, they can rapidly be converted into a numer...

MATLAB Language • Reading large files

CAST data to JSON type

This converts valid json strings to MySQL JSON type: SELECT CAST('[1,2,3]' as JSON) ; SELECT CAST('{"opening":"Sicilian","variations":["pelikan","dragon","najdorf"]}' as JSON);

MySQL • JSON

Outputting to ElasticSearch: multiple indices and mappings

Sometimes, you need to output to more than one index in ElasticSearch, or have a custom mapping you want to apply to new indices as they roll in. There are two ways to apply a custom mapping. One way, is to upload an ElasticSearch template. See the ElasticSearch documentation for that. The other ...

logstash • Getting started with logstash

Moving the last item of the block to the beginning

This one-liner illustrates some of the basic series operations. Before analysing, we'll initiate a block to be manipulated: stuff: [chair lamp table book carpet] Now our one-liner: head insert stuff take back tail stuff There are five operations within this example, and with each of them it...

rebol • Series

Deploying a Spring Boot Application to Elastic Beanstalk

Objectives: Using the Spring CLI, we will create a new Spring Boot application to be deployed to Elastic Beanstalk. We will edit the generated Spring Boot application so that it will: Create a jar named aws-eb-demo.jar. Listen on port 5000. Include a single web page named index.html. ...

elastic-beanstalk • Deploy a Java Web Application to Elastic Beanstalk

When to use which cast in c++

Use dynamic_cast for converting pointers/references within an inheritance hierarchy. Use static_cast for ordinary type conversions. Use reinterpret_cast for low-level reinterpreting of bit patterns. Use with extreme caution. Use const_cast for casting away const/volatile. Avoid this unless you ar...

C++ • RTTI: Run-Time Type Information

Automatically map custom model to data structure

After you have set a few data to database and have get a structure consisting of several nodes like this; "user" : { "-KdbKcU2ptfYF2xKb5aO" : { "firstName" : "Arthur", "lastName" : "Schopenhauer", "userName&q...

firebase-database • Getting started with firebase-database