SethTisue

Scalawags #34: The Collections They Are(n’t?) A Changin’

YouTube link: https://www.youtube.com/watch?v=uTiiwszdksU

Your hosts: Josh Suereth, Dick Wall, Daniel Spiewak, Seth Tisue

Join us during and between episodes for web-based Scalawags chat on Gitter.

Intro (0:00)

SethTisue

Before we get started, may I hold the floor for a minute?
I’d like to open the podcast with a reflection on American history.

The leaders of Typelevel.org are open
in using the word “fork”
to describe what they’re planning to do.

As an American, this has me thinking about our history.

The United States itself was founded when the American revolutionaries forked the United Kingdom.

SethTisue

The question

"we’re looking at changing the Scala gitter rooms. well-intentioned newbies are very understandably always blundering into this room, so we want to make this the general room, and call the dev/contributors/internals rooms something else. I see Akka uses akka/dev, Play uses playframework/contributors, and sbt uses sbt-dev. we’re considered scala/scala/dev or scala/scala/internals or scala/dev or scala/internals. do y’all know if naming have any implications for integration as far as issue links, activity feed,

SethTisue

Scalawags #33: Back to School

YouTube link: https://www.youtube.com/watch?v=z1uviQbKe0U

Your hosts: Josh Suereth, Dick Wall, Daniel Spiewak, Seth Tisue

Join us during and between episodes for web-based Scalawags chat on Gitter.

Intro (0:00)

SethTisue

$ ANT_OPTS="-Dfile.encoding=UTF-8 -server -XX:+AggressiveOpts -XX:+UseParNewGC -Xmx2G -Xss1M -XX:MaxPermSize=512M -XX:ReservedCodeCacheSize=128M" ../apache-ant-1.9.6/bin/ant.bat -Dstarr.version=2.11.7 -Dscalac.args.optimise=-optimise -Dlocker.skip=1 test
Buildfile: Y:\tisue\scala\build.xml

desired.jars.uptodate:

boot:

init.git:

init:

SethTisue

Keybase proof

I hereby claim:

• I am SethTisue on github.
• I am sethtisue (https://keybase.io/sethtisue) on keybase.
• I have a public key whose fingerprint is 638F 9B63 9EC0 110D DEB0 2B8D 10B0 9AD4 4B86 92CA

To claim this, I am signing this object:

SethTisue

scala> class C
defined class C

scala> implicit val c = new C
c: C = C@33833882

scala> def foo(x: Int)(implicit c: C) = x + 1
foo: (x: Int)(implicit c: C)Int

scala> foo(3)

SethTisue

Scalawags #32: Scala Puzzlers

YouTube link: https://www.youtube.com/watch?v=kCcWxI85hbg

Our guests Andrew Phillips and Nermin Šerifović (aka @higherkinded) bring us puzzlement both enlightening and confounding. They are the authors of Scala Puzzlers (Artima Press), creators of scalapuzzlers.com, and keepers of @ScalaPuzzlers.

SethTisue

scala> Array(0) == Array(0)
res9: Boolean = false
scala> (Array(0): Seq[Int]) == (Array(0): Seq[Int])
res10: Boolean = true

SethTisue

scala> import scala.language.existentials
import scala.language.existentials

scala> class Outer { class Inner }
defined class Outer

scala> def f[I <: o.Inner forSome { val o: Outer }](i1: I, i2: I) = ()
f: [I <: o.Inner forSome { val o: Outer }](i1: I, i2: I)Unit

scala> val o1, o2 = new Outer