Sagar Karira sagarkarira

Check the existing map before updating GET http://localhost:9200/myIndex/myType/_mapping

PUT http://localhost:9200/myIndex/_mapping/myType

{
  "properties": {
		"newField": {
 "type": "keyword"

####Listing all tables in a dataset

bq ls -n 9000 project:dataset

Deleting a table in dataset

Studying for a Tech Interview Sucks, so Here's a Cheat Sheet to Help

This list is meant to be a both a quick guide and reference for further research into these topics. It's basically a summary of that comp sci course you never took or forgot about, so there's no way it can cover everything in depth. It also will be available as a gist on Github for everyone to edit and add to.

Data Structure Basics

###Array ####Definition:

Stores data elements based on an sequential, most commonly 0 based, index.
Based on tuples from set theory.

Adding alias of logstash to the .bashrc

alias logstash='bash /opt/logstash/bin/logstash'

Basic logstash pipeline will output what is inputted to the command line

logstash -e 'input { stdin { } } output { stdout {} }'

Testing config files

logstash --configtest -f first-pipeline.conf
sudo service logstash configtest

Changing MySql Password -

ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPass';

Taking mysql dump along with master server pos and file without locking write commands -

mysqldump -u root -p --single-transaction --master-data=2 freshman > freshman.sql

	<!--
	Rose 3D
	- three.js OBJLoader demo

	Rose 3D Model : archive3d https://archive3d.net/?a=download&id=5daf66f8# : cc0
	- [model changeLog] Remove stems and materials
	-->
	<!-- using three.js -->

	<main>


	/** So this one is simple. Object are object */
	var obj = {};
	console.log(obj); //{}
	console.log(typeof(obj)); //object

	/** Doubt-1 Why does JS returns typeof of function as function.
	All functions are objects in JS. Look ahead.
	Doubt -2 Why it doesn't print {[Function]} ?
	Doubt -3 Are not object have key value pair ? value of function object is [Function] but what is the key ?

	SELECT
	tb_sub_items.sub_item_id ,
	tb_sub_items.sub_item_name,
	(tb_pricing.price/ tb_base_unit.conversation_factor) as purchase_price_input
	FROM
	tb_sub_items
	JOIN
	tb_pricing
	ON tb_pricing.sub_item_id = tb_sub_items.sub_item_id
	JOIN

	## Git diff excluding certain files

	``
	git diff -- . ':(exclude)package-lock.json'
	``

	##

	It's important to note that setTimeout(..) doesn't put your callback on the event loop queue. What it does is set up a timer; when the timer expires, the environment places your callback into the event loop, such that some future tick will pick it up and execute it.

	What if there are already 20 items in the event loop at that moment? Your callback waits. It gets in line behind the others -- there's not normally a path for preempting the queue and skipping ahead in line. This explains why setTimeout(..) timers may not fire with perfect temporal accuracy. You're guaranteed (roughly speaking) that your callback won't fire before the time interval you specify, but it can happen at or after that time, depending on the state of the event queue.