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Mohan Narayanaswamy mohanmca

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mohanmca / install_scala_sbt.sh
Last active August 29, 2015 14:07 — forked from visenger/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
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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.

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mohanmca / scalax_2014_slides.md
Last active August 29, 2015 14:11 — forked from wozmir/scalax_2014_slides.md
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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
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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:

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mohanmca / clk.tsv
Last active August 29, 2015 14:22 — forked from ceteri/clk.tsv
2014-03-04 15dfb8e6cc4111e3a5bb600308919594 11
2014-03-06 81da510acc4111e387f3600308919594 61
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mohanmca / 01.repl.txt
Last active August 29, 2015 14:22 — forked from ceteri/01.repl.txt
$ ./bin/spark-shell
14/04/18 15:23:49 INFO spark.HttpServer: Starting HTTP Server
14/04/18 15:23:49 INFO server.Server: jetty-7.x.y-SNAPSHOT
14/04/18 15:23:49 INFO server.AbstractConnector: Started SocketConnector@0.0.0.0:49861
Welcome to
____ __
/ __/__ ___ _____/ /__
_\ \/ _ \/ _ `/ __/ '_/
/___/ .__/\_,_/_/ /_/\_\ version 0.9.1
/_/
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mohanmca / log.scala
Last active August 29, 2015 14:22 — forked from ceteri/log.scala
// load error messages from a log into memory
// then interactively search for various patterns
// base RDD
val lines = sc.textFile("log.txt")
// transformed RDDs
val errors = lines.filter(_.startsWith("ERROR"))
val messages = errors.map(_.split("\t")).map(r => r(1))
messages.cache()
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mohanmca / git-cheatsheet
Last active August 29, 2015 14:27 — forked from TomyJaya/git-cheatsheet.md
git-cheatsheet
# Cloning a remote repository (SSH)
git clone <user@server:path/to/repo.git>
e.g. git clone git@github.com:TomyJaya/git-real.git
# Cloning a remote repository (https)
git clone <URL>
e.g. git clone https://github.com/TomyJaya/git-real.git
# Checking the Status of Your Files
git status
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mohanmca / README.md
Last active May 14, 2016 14:09 — forked from jmarceli/README.md
React errors explained

1

You will get one of these:

Uncaught (in promise) TypeError: Cannot read property 'toUpperCase' of undefined(…)

ReactCompositeComponent.js:870 Uncaught TypeError: Cannot read property 'displayName' of undefined

if you try to: