Suppose we want to have the following behaviour - We have a heading (say h3 element) and on clicking it, we want it to become an input box so that we can modify heading name. React makes this highly simple and intuitive using component states and if else statements. (Code explanation below)
// I ha...
The first thing you want to do for local development is install ElasticSearch in your machine and test it to see if it is running. It requires Java to be installed. The installation is pretty straightforward:
Mac OS X: brew install elasticsearch
Ubuntu: sudo apt-get install elasticsearch
Then...
When you are getting started with ElasticSearch (ES) it might be good to have a graphical tool that helps you explore your data. A plugin called elasticsearch-head does just that. To install it, do the following:
Find out in which folder ES is installed: ls -l $(which elasticsearch)
cd into this...
ElasticSearch has a well-documented JSON API, but you'll probably want to use some libraries that handle that for you:
Elasticsearch - the official low level wrapper for the HTTP API
Elasticsearch-rails - the official high level Rails integration that helps you to connect your Rails models...
FOR XML PATH and STUFF to concatenate the multiple rows into a single row:
select distinct t1.id,
STUFF(
(SELECT ', ' + convert(varchar(10), t2.date, 120)
FROM yourtable t2
where t1.id = t2.id
FOR XML PATH (''))
, 1,...
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...
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...
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.domain;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
//simple person object with JPA annotations
@Entity
public class Person {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private Long id;
...
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...
