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What are type lambdas in Scala and what are their benefits?
... point[A](a: A): M[A]
def bind[A, B](m: M[A])(f: A => M[B]): M[B]
}
Now, Either is a type constructor of two arguments, but to implement Monad, you need to give it a type constructor of one argument. The solution to this is to use a type lambda:
class EitherMonad[A] extends Monad[({type λ[...
How do I pass data between Activities in Android application?
...
Hey, I know this thread was quite a while back, but the link provided is now a dead end. Is there anywhere I can find the example?
– JuiCe
Jun 15 '12 at 14:38
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load and execute order of scripts
There are so many different ways to include JavaScript in a html page. I know about the following options:
4 Answers
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How to hide Soft Keyboard when activity starts
...an Edittext with android:windowSoftInputMode="stateVisible" in Manifest. Now the keyboard will be shown when I start the activity. How to hide it? I cannot use android:windowSoftInputMode="stateHidden because when keyboard is visible then minimize the app and resume it the keyboard should be vis...
Arrays, heap and stack and value types
... │
16 └───────────────────┘
Now if you had three local variables in a function, of types RefType, ValType, and int[], like this:
RefType refType;
ValType valType;
int[] intArray;
then your stack might look like this:
0 ┌───────...
Extracting the last n characters from a ruby string
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You are missing .join - now it returns an array of strings. Instead it should be "123".split(//).last(5).join (Ruby 2.0.0)
– Pavel Nikolov
Jul 10 '13 at 13:47
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Run an untrusted C program in a sandbox in Linux that prevents it from opening files, forking, etc.?
...t.c root/assignment.c
Exit the VM's root FS:
cd ..
sudo umount mountpoint
Now the image is ready, we just need to run it. It will compile and run the submission after booting.
mkfifo /tmp/guest_output
Open a seperate terminal and start listening for guest output:
dd if=/tmp/guest_output bs=1
In an...
How to know what the 'errno' means?
...en calling execl(...) , I get an errno=2 . What does it mean? How can I know the meaning of this errno ?
15 Answers
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How can I find and run the keytool
...ow these steps (for facebook apps)
Download the openssl for windows here
now unzip to c drive
open cmd prompt
type cd C:\Program Files\Java\jdk1.6.0_26\bin
then type only keytool -export -alias myAlias -keystore C:\Users\<your user name>\.android\myKeyStore | C:\openssl-0.9.8k_WIN32\bin\open...
How is Node.js inherently faster when it still relies on Threads internally?
...nx is outperforming it in the cases he's talking about because it's not.)
Now, if you were really clever, you would express the code above in a way where the environment could go off and do something else while you're running the query:
query( statement: "select smurfs from some_mushroom", callbac...