Tutorial by Examples: s

Ubuntu binaries are available for both 32-bit and 64-bit architectures source /etc/lsb-release && echo "deb http://download.rethinkdb.com/apt $DISTRIB_CODENAME main" | sudo tee /etc/apt/sources.list.d/rethinkdb.list wget -qO- https://download.rethinkdb.com/apt/pubkey.gpg | sudo a...

Downloading Prerequisites: We provide native 64-bit binaries for Windows 7 and above. A 64-bit version of Windows is required. Download the ZIP archive and unpack it in a directory of your choice. The Windows port of RethinkDB is a recent addition and hasn't received as much tuning as the Linux a...

C source file gcc -Wall -Wextra -o main main.c C++ source file g++ -Wall -Wextra -Wconversion -Woverloaded-virtual -o main main.cpp

User defined table functions represented by org.apache.hadoop.hive.ql.udf.generic.GenericUDTF interface. This function allows to output multiple rows and multiple columns for a single input. We have to overwrite below methods : 1.we specify input and output parameters abstract StructObjectInspe...

Sample XML <Students> <Student> <Name> <First>Ashley</First> <Last>Smith</Last> </Name> <Grades> <Exam1>A</Exam1> <Exam2>B</Exam2> ...

Sample XML <Students> <Student> <Name> <First>Ashley</First> <Last>Smith</Last> </Name> <Grades> <Exam1>A</Exam1> <Exam2>B</Exam2> ...

Navs available in Bootstrap have shared markup, starting with the base .nav class, as well as shared states. Swap modifier classes to switch between each style. Tabs <ul class="nav nav-tabs"> <li role="presentation" class="active"><a href="#&quo...

Update build.sbt with : scalaVersion := "2.11.8" // Make sure to have installed Scala 11 sparkVersion := "2.0.0" // Make sure to have installed Spark 2.0 Note that when compiling with sbt package, the .jar will now be created in target/scala-2.11/, and the .jar name will al...

ML Transformers now generates org.apache.spark.ml.linalg.VectorUDT instead of org.apache.spark.mllib.linalg.VectorUDT. They are also mapped locally to subclasses of org.apache.spark.ml.linalg.Vector. These are not compatible with old MLLib API which is moving towards deprecation in Spark 2.0.0. //...

The Firebase auth system is the source of a users uid, displayName, photoURL, and maybe email. Password based accounts set these persistent values in the auth system via the .updateProfile method. Storing these values in the Realtime Database, rDB, users node poses the issue of stale data. Displa...

package com.example; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication public class Application { //main entry point public static void main(String[] args) { SpringApplication.run...

package com.example.domain; import org.springframework.data.jpa.repository.JpaRepository; import org.springframework.data.repository.query.Param; import org.springframework.data.rest.core.annotation.RepositoryRestResource; import org.springframework.data.rest.core.annotation.RestResource; /...

This custom UserControl will appear as a regular combobox, but unlike the built-in ComboBox object, it can show the user a default string of text if they have not made a selection yet. In order to accomplish this, our UserControl will be made up of two Controls. Obviously we need an actual ComboBox...

Let we assume we have two databases "ORA1" and "ORA2". We can access the objects of "ORA2" from database "ORA1" using a database link. Prerequisites: For creating a private Database link you need a CREATE DATABASE LINK privilege. For creating a private Data...

QML came with rich set of visual elements. Using only QML we can build complex applications with these elements. Also it's very easy to build your own element based on set of standard items like Rectangle, Button, Image etc. Moreover, we can use items like Canvas to build element with custom paint...

Goto - http://www.jorambarrez.be/blog/2010/08/02/tutorial-a-bpmn-2-0-hello-world-with-activiti-5-0-alpha4-in-5-steps/ A very Good and detailed tutorial by Joram Barrez (one of the core Developer of Activiti)

Plugins are a way for a developer to modify a chart as it is being created. Chart.js calls all plugins at the following chart states: Start of initialization End of initialization Start of update After the chart scales have calculated Start of datasets update End of datasets update End of u...

Create horizontal lines with a label. This could be used to show notable values in the chart data (e.g. min, max, average). JSFiddle Demo var horizonalLinePlugin = { afterDraw: function(chartInstance) { var yScale = chartInstance.scales["y-axis-0"]; var canvas = chartInstance...

// 1. Connect to the database (this example with MySQL) $host = 'localhost'; $database = 'users'; $user = 'root'; $password = ''; $dsn = "mysql:host=$host;dbname=$database"; $pdo = new PDO($dsn, $user, $password); // 2. Prepare your query // 2.1 First way $query_1 = "SELE...

Denormalization and a flat database structure is neccessary to efficiently download separate calls. With the following structure, it is also possible to maintain two-way relationships. The disadvantage of this approach is, that you always need to update the data in multiple places. For an example, ...