Mohan Narayanaswamy mohanmca

## JVM titbits
Always start truning the young generation first.

java -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -verbose:gc  -Xloggc:/var/tmp/jvm_gc.log

java -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:PrintHeapAtGc -XX:-PrintTenuringDistribution -XX:-HeapDumpOnOutOfMemoryError -verbose:gc  -Xloggc:/var/tmp/jvm_gc.log

Histogram
-XX:-PrintClassHistogram (JMap -histo)


## ElasticSearch
ElasticSearch is SchemaFree, Lucene based, Massively scalable, Distributed.

Run as many time as you want. (Multinode)

$> bin/elasticsearch
$> curl -XGET localhost:9200/?pretty
$> curl "http://localhost:9200/_cluster/health?pretty=true"

$> PUT /index/type/id (database/Table/EntityID)
$> curl -XPUT /mysite/node/1 -d

## Todo
http://gallery.mailchimp.com/2956421f3caab54f1e563f370/files/Flexible_Analytics_for_Large_Data_Sets_Using_Elasticsearch.pdf

http://stackoverflow.com/questions/4415511/scala-type-programming-resources

## install_scala_sbt.sh
#!/bin/sh

# one way (older scala version will be installed)
# sudo apt-get install scala

#2nd way
sudo apt-get remove scala-library scala
wget http://www.scala-lang.org/files/archive/scala-2.11.2.deb
sudo dpkg -i scala-2.11.2.deb
sudo apt-get update

## MyOwnLesson
TesCase gives confident, and time spent on writing testcase always ended up worthwhile.

Are you stuck? confirm that you read the wiki/document from top-to-bottom, and confirm that you are not trying to jump fence by assuming what is written in wiki

## Day 1.md

      
              2 files
            
          
              0 forks
            
          
              0 comments
            
          
              0 stars
            
          
                mohanmca
                / Day 1.md
            
            
              Last active
              August 29, 2015 14:09
                — forked from gangstead/Day 1.md
            
          
    Friday 11/14/14

notes by Steven Gangstead
Rapture Art of One-liner - Jon Pretty @propensive

rapture.io
-collection of libraries for scala
jawn json parser.  Quicker than Jackson, and I guess Jackson must normally be considered the quickest.
My thoughts: Awesome talk. Look into rapture, looks useful. Jon is smart.

  
## scalax_2014_slides.md

      
              1 file
            
          
              0 forks
            
          
              0 comments
            
          
              0 stars
            
          
                mohanmca
                / scalax_2014_slides.md
            
            
              Last active
              August 29, 2015 14:11
                — forked from wozmir/scalax_2014_slides.md
            
          
    ##Scala eXchange 2014 slides
collected by Adam Warski
Feel free to complete the list!
The Binary Compatibility Challenge by Martin Odersky
A Skeptic's Look at scalaz' "Gateway Drugs”: A Practical Exploration by Brendand McAdams

  
## The Four Essential Eﬀects In Programming.md

      
              1 file
            
          
              0 forks
            
          
              0 comments
            
          
              0 stars
            
          
                mohanmca
                / The	Four Essential Eﬀects In Programming.md
            
            
              Last active
              August 29, 2015 14:16
                — forked from ScottWeinstein/The	Four Essential Eﬀects In Programming.md
            
          
One
Many


Synchronous
T/Try[T]
Iterable[T]


Asynchronous
Future[T]
Observable[T]


Via Erik Meijer/Reactive Programming (video) and slides

  
## indylambda.md

      
              1 file
            
          
              0 forks
            
          
              0 comments
            
          
              0 stars
            
          
                mohanmca
                / indylambda.md
            
            
              Last active
              August 29, 2015 14:20
                — forked from retronym/indylambda.md
            
          
    indylambda: Putting invokedynamic to work for Scala

Java 8 introduced lambdas to the Java language. While the design choices differ in many regards from Scala's functions, the underlying mechanics used to represent Java lambdas is flexible enough to be used as a target for the Scala compiler.
Lambdas in Java

Java does not have canonical heirarchy of generic function types (ala scala.FunctionN), but instead allows a lambda to be used as a shorthand for an anonymous implementation of an Functional Interface
Here's an example of creating a predicate that closes over one value:

  
## clk.tsv

          
            2014-03-04
            15dfb8e6cc4111e3a5bb600308919594
            11

            
              2014-03-06
              81da510acc4111e387f3600308919594
              61
	Always start truning the young generation first.

	java -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -verbose:gc -Xloggc:/var/tmp/jvm_gc.log

	java -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:PrintHeapAtGc -XX:-PrintTenuringDistribution -XX:-HeapDumpOnOutOfMemoryError -verbose:gc -Xloggc:/var/tmp/jvm_gc.log

	Histogram
	-XX:-PrintClassHistogram (JMap -histo)
	ElasticSearch is SchemaFree, Lucene based, Massively scalable, Distributed.

	Run as many time as you want. (Multinode)

	$> bin/elasticsearch
	$> curl -XGET localhost:9200/?pretty
	$> curl "http://localhost:9200/_cluster/health?pretty=true"

	$> PUT /index/type/id (database/Table/EntityID)
	$> curl -XPUT /mysite/node/1 -d
	http://gallery.mailchimp.com/2956421f3caab54f1e563f370/files/Flexible_Analytics_for_Large_Data_Sets_Using_Elasticsearch.pdf

	http://stackoverflow.com/questions/4415511/scala-type-programming-resources
	#!/bin/sh

	# one way (older scala version will be installed)
	# sudo apt-get install scala

	#2nd way
	sudo apt-get remove scala-library scala
	wget http://www.scala-lang.org/files/archive/scala-2.11.2.deb
	sudo dpkg -i scala-2.11.2.deb
	sudo apt-get update
	TesCase gives confident, and time spent on writing testcase always ended up worthwhile.

	Are you stuck? confirm that you read the wiki/document from top-to-bottom, and confirm that you are not trying to jump fence by assuming what is written in wiki
	One	Many
Synchronous	T/Try[T]	Iterable[T]
Asynchronous	Future[T]	Observable[T]
	2014-03-04	15dfb8e6cc4111e3a5bb600308919594	11
	2014-03-06	81da510acc4111e387f3600308919594	61