Comments for //extrabright

Comment on Scala Question Regarding readLine by pajai

pajai — Sat, 10 Jul 2010 20:55:06 +0000

Indeed, there is also this possibility. Interesting.

Comment on Scala Question Regarding readLine by Slava

Slava — Sat, 10 Jul 2010 19:52:52 +0000

Sorry for my English, i’m just to unclear…

the “line” is a value and cannot be executed, it is assigned only once from the result of the “Console.readLine” method execution. It is used than three times in your closure. But if you define it as a method, it will be executed three times:

(1 to 3) foreach {
def line = Console.readLine
i => println(line)
}

Comment on Scala Question Regarding readLine by pajai

pajai — Sat, 10 Jul 2010 19:52:03 +0000

Just noticed that the code is behaving as expected if the val definition is located in the second part of the closure:

(1 to 3) foreach {
i =>
val line = Console.readLine
println(line)
}

Comment on Scala Question Regarding readLine by pajai

pajai — Sat, 10 Jul 2010 19:45:05 +0000

Oh, ok. I get it. So the val definition inside the closure is just executed once. I would have expected that it is executed each time the closure is executed. Thanks for the answer!

Comment on Scala Question Regarding readLine by Slava

Slava — Sat, 10 Jul 2010 19:38:22 +0000

Hi!
I’m definitely not a Scala expert, but…

The problem with the first snippet is that the function you define is

i => println(line)

This is a closure which will be executed three times as expected. But it is closed to the line value which is read one time from the console.

In the second snippet the function is

i => println(Console.readLine)

which is just executed three times.

Comment on Java Quiz of the Day by pajai

pajai — Thu, 01 Jul 2010 10:05:24 +0000

Yes it is beautifully solved in Scala. The ability to define the co- and contravariance with respect to Generic type directly at the definition point is clever.

Comment on Java Quiz of the Day by Heiko

Heiko — Thu, 01 Jul 2010 09:38:25 +0000

Check out Scala’s co- and contravariance features => Very handy to get things like above working!

Comment on GPGMail Compatible with Snow Leopard by pajai

pajai — Sun, 11 Apr 2010 18:16:26 +0000

OS X 10.6.3 breaks the previously posted version of GPGMail. Here is a link to a fix for 10.6.3:

http://github.com/downloads/lukele/GPGMail-SL/GPGMail.mailbundle-1.2.3-v61-10.6.3-fix.zip

Comment on The Geekiest Hello World by pajai

pajai — Fri, 12 Jun 2009 20:07:16 +0000

Hi Ben!

hey, that’s cool your version in Python.

Cheers!

Comment on The Geekiest Hello World by BenP

BenP — Thu, 11 Jun 2009 23:00:24 +0000

gah not formatted properly, but you get the gist…