James Yang jamesyang124

Thread Pools

Thread pools on the JVM should usually be divided into the following three categories:

CPU-bound
Blocking IO
Non-blocking IO polling

Each of these categories has a different optimal configuration and usage pattern.

Applied Functional Programming with Scala - Notes

1. Mastering Functions

A function is a mapping from one set, called a domain, to another set, called the codomain. A function associates every element in the domain with exactly one element in the codomain. In Scala, both domain and codomain are types.

val square : Int => Int = x => x * x

Typically, you can't use a 'new' operator on a generic type. This is because of type erasure.

scala> def create[T] = new T
<console>:7: error: class type required but T found
   def create[T] = new T
                       ^

Scala gives a way of getting around this problem, with the Manifest class.

scala> def create[T](implicit m:Manifest[T]) = m.erasure.newInstance

Currently considering https://github.com/webdriverio/webdrivercss

Core Goals:

Can test in up-to-date versions of all major browsers
Can test on up-to-date versions of all major OSes
Can test in IE9 (because Bootstrap v4 will support IE9+)
Don't want to have to setup/maintain our own cluster of VMs running all the necessary OSes (and all the versions of Windows)
Workflow for management of reference/baseline/norm screenshots

OpenSSL Base64 Encoding: Binary Safe and Portable

Herewith is an example of encoding to and from base64 using OpenSSL's C library. Code presented here is both binary safe, and portable (i.e. it should work on any Posix compliant system e.g. FreeBSD and Linux).

License

The MIT License (MIT)

	package com.vast.example

	import java.net.InetSocketAddress
	import java.util.UUID
	import java.util.concurrent.{Executors, TimeUnit}
	import com.google.common.base.Splitter
	import com.twitter.finagle.http.Http
	import com.twitter.finagle.builder.{Server, ServerBuilder}
	import com.twitter.finagle.service.TimeoutFilter
	import com.twitter.finagle.{Service, SimpleFilter, GlobalRequestTimeoutException}

	class A
	class A2 extends A
	class B

	trait M[X]

	//
	// Upper Type Bound
	//
	def upperTypeBound[AA <: A](x: AA): A = x

	=begin

	Useage:

	#assets/locales/en.js.erb
	```js
	//= depend_on_config 'locales/es.yml'
	```
	=end

	node {
	echo 'No quotes in single backticks'
	sh 'echo $BUILD_NUMBER'
	echo 'Double quotes are silently dropped'
	sh 'echo "$BUILD_NUMBER"'
	echo 'Even escaped with a single backslash they are dropped'
	sh 'echo \"$BUILD_NUMBER\"'
	echo 'Using two backslashes, the quotes are preserved'
	sh 'echo \\"$BUILD_NUMBER\\"'
	echo 'Using three backslashes still results in preserving the single quotes'