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package org.khanacademy.core.util;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.khanacademy.core.util.test_util.Observables.collectAll;
import static org.khanacademy.core.util.test_util.Observables.collectFirst;

import org.khanacademy.core.base.BaseTestCase;
import org.khanacademy.core.exceptions.TestException;

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package org.khanacademy.core.util;

import static com.google.common.base.Preconditions.checkNotNull;

import com.google.common.base.Optional;
import rx.Observable;
import rx.Observable.OnSubscribe;
import rx.Subscriber;
import rx.Subscription;
import rx.functions.Action0;

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let exerciseTransitioningSignal = exerciseTransitioningSubject
	.startWithBoxedValue(false)
	.takeUntil(rac_willDeallocSignal())
controlsEnabledSubscription = exerciseTransitioningSignal
	.combineLatestWith(isReachableSignal)
	.map {
		let tuple = $0 as! RACTuple
		let isExerciseTransitioning = (tuple.first as! Box<Bool>).value
		let isReachable = (tuple.second as! Box<Bool>).value

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	override func loadView() {
		// Create a KAExerciseControlsDelegate implementation that invokes methods on the delegate
		// of this instance.
		weak var weakSelf = self
		class ViewDelegate: KAExerciseControlsDelegate {
			// Invokes the given block with the view controller and its delegate, if both are still
			// allocated.
			private func callControllerDelegate(caller: (ExerciseControlsViewDelegate, ExerciseControlsViewController) -> Void) {
				if let strongSelf = weakSelf, strongDelegate = strongSelf.delegate {
					caller(strongDelegate, strongSelf)

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        /*
        getFragmentManager()
                .beginTransaction()
                .replace(android.R.id.content, TopicTutorialListFragment.newInstance(subject))
                .addToBackStack("subject")
                .commit();
                */

        System.out.println("navigating");
        Article article = new Article("xbdcfe503", "An Introduction to the Protestant Reformation");

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package org.khanacademy.core.topictree.models;

/**
 * An enumeration over all exercise frameworks.
 */
public enum ExerciseFramework {
    KHAN_EXERCISES,
    PERSEUS,
}

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package org.khanacademy.core.topictree.models;

import com.google.common.base.MoreObjects;
import com.google.common.base.Objects;
import com.google.common.base.Preconditions;

/**
 * Uniquely identifies an {@link Exercise} instance.
 */
public final class ExerciseDescriptor {

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package org.khanacademy.core.topictree.models;

import com.google.common.base.MoreObjects;
import com.google.common.base.Preconditions;

import org.khanacademy.core.topictree.identifiers.ContentItemIdentifiable;
import org.khanacademy.core.topictree.identifiers.ContentItemIdentifier;
import org.khanacademy.core.topictree.identifiers.ContentItemKind;

/**

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//
//  ViewController.swift
//  deinit-failure
//
//  Created by Mike Parker on 2/26/15.
//  Copyright (c) 2015 Mike Parker. All rights reserved.
//

import UIKit

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/**
 UIAlertViewDelegate used when the user can only go back, and so the associated handler
 has no parameters.
 */
private class BackOnlyErrorDelegate: NSObject, UIAlertViewDelegate {
	private let handler: () -> Void

	private init(handler: () -> Void) {
		self.handler = handler
	}