stevenroose

  EncryptedPrivateKey encrypt(Uint8List privKey, KeyParameter aesKey) {
    if(privKey == null || aesKey == null) throw new ArgumentError();
    Uint8List iv = new Uint8List(BLOCK_LENGTH);
    // TODO fill iv with random bytes from securerandom
    ParametersWithIV keyWithIv = new ParametersWithIV(aesKey, iv);
    PaddedBlockCipher cipher = new PaddedBlockCipherImpl(new PKCS7Padding(), new CBCBlockCipher(new AESFastEngine()));
    cipher.init(true, keyWithIv);
    Uint8List encryptedKey = cipher.process(privKey);

stevenroose

Process:         dota_osx [1774]
Path:            /Users/USER/Library/Application Support/Steam/*/dota_osx
Identifier:      dota_osx
Version:         ???
Code Type:       X86 (Native)
Parent Process:  bash [1771]
User ID:         501

Date/Time:       2014-05-18 17:19:40.949 +0200
OS Version:      Mac OS X 10.8.5 (12F45)

stevenroose

public void execute(Worm worm){
	Map<String, Type> context = new HashMap<String, Type>();
	context.put("self", new WormEntityType(worm));
	programTree.execute(context);
}
  

stevenroose

public class AssignmentStatement implements Statement {
	
	String name;
	Expression rhs;
	public AssignmentStatement(String name, Expression rhs) {
		this.name = name;
		this.rhs = rhs;
	}

	public void execute(Map<String, Type> context) {

stevenroose

public abstract class Statement {
	
	public void execute(Map<String, Type> context);

	/**
	 * Updates the global context with the changes made in the local scope.
	 * Variables newly created in the scope are discarded.
	*/
	protected void updateContext(Map<String, Type> context, Map<String, Type> scopeContext) {
		for(String key : context.keySet()) {

stevenroose

Steven-Rooses-MacBook-Pro:capsel4 steven$ python3 ~/Downloads/problog2/src/problog.py /Volumes/Data/Google\ Drive/school/irw/1ma/mettim/capsel4/part1.pl
Calling external process failed:
Command '/Users/steven/Downloads/problog2/assist/darwin/dsharp -Fnnf /var/folders/91/_k0t34l161qf90jgdsd995q40000gn/T/tmpu1jtlxz1/compile_cnf.nnf -Fgraph /var/folders/91/_k0t34l161qf90jgdsd995q40000gn/T/tmpu1jtlxz1/compile_cnf.nnf.graph -smoothNNF -disableAllLits /var/folders/91/_k0t34l161qf90jgdsd995q40000gn/T/tmpu1jtlxz1/compile_cnf' returned -11

stevenroose

Verifying myself: My Bitcoin username is +stevenroose. https://onename.io/stevenroose

stevenroose

/**
 * Results for the Dart VM (v1.7.2)
 * Duration for bignum's BigInteger: 59s
 * Duration for rational's BigInt: 197s
 *
 * Results for dart2js in Chrome (v39.0.2171.62)
 * Duration for bignum's BigInteger: 77s
 * Duration for rational's BigInt: 474s
 */

stevenroose

Using deferred loading to create environment-independent libraries in Dart

The problem

Upon creating my first Dart library, I bumped into the issue of the environment-dependent libraries dart:io and dart:html, and most importantly the fact that some very similar functionality is present in both of them.

It bothered my ever-since that many libraries had to split up into two counterparts and so did some of the classes within. Let's say one of your classes uses WebSockets. The WebSocket is defined differently in dart:io and dart:html. So what you have to do create an abstract class for the general case and then create two subclasses in their own libraries that fill the gap of the WebSocket interface.

It would look like this:

stevenroose

library environment;

import "dart:async";
import "dart:io" deferred as io;
import "dart:html" deferred as html;


Future inEnvironment({Future onIo(), Future onHtml()}) {
  Completer c = new Completer();
  io.loadLibrary().then((_) {