ZacSweers

/*
 * Here we want to get the appbar offset changes paired with the direction it's moving and
 * using RxBinding's great `offsetChanges` API to make an rx Observable of this. The first
 * part buffers two while skipping one at a time and emits y delta pairs (cur and prev). Second 
 * part is just a simple map to pair the offset with the resolved scroll direction comparing 
 * to the previous offset. This gives us a nice stream of (offset, direction) emissions.
 *
 * Note that the filter() is important if you manipulate child views of the ABL. If any child
 * view requests layout again, it will trigger an emission from the offset listener with the
 * same value as before, potentially causing measure/layout/draw thrashing if your logic 

ZacSweers

Table Of Contents

• [Data Structures] (https://gist.github.com/lawloretienne/6f7d7d92f72986f5ebd60f226d9044ee#data-structures)
• [Linked Lists] (https://gist.github.com/lawloretienne/6f7d7d92f72986f5ebd60f226d9044ee#linked-lists)
• [Trees] (https://gist.github.com/lawloretienne/6f7d7d92f72986f5ebd60f226d9044ee#trees)
  • [Binary Trees] (https://gist.github.com/lawloretienne/6f7d7d92f72986f5ebd60f226d9044ee#binary-trees)
  • [Binary Search Tree] (https://gist.github.com/lawloretienne/6f7d7d92f72986f5ebd60f226d9044ee#binary-search-tree)
  • [Red-Black Tree] (https://gist.github.com/lawloretienne/6f7d7d92f72986f5ebd60f226d9044ee#red-black-tree)
  • [AVL Tree] (https://gist.github.com/lawloretienne/6f7d7d92f72986f5ebd60f226d9044ee#avl-tree)
• [Tries] (https://gist.github.com/lawloretienne/6f7d7d92f72986f5ebd60f226d9044ee#tries)

ZacSweers

    /**
     * @param interval      The base interval to start backing off from. The function is: attemptNum^2 * intervalTime
     * @param units         The units for interval
     * @param retryAttempts The max number of attempts to retry this task or -1 to try MAX_INT times,
     */
    public static <T> Observable.Transformer<T, T> backoff(final long interval, final TimeUnit units, final int retryAttempts) {
        return new Observable.Transformer<T, T>() {
            @Override
            public Observable<T> call(final Observable<T> observable) {
                return observable.retryWhen(

ZacSweers

// retries up to 3 times while exponentially backing off with each retry
                .retryWhen(errors ->
                        errors
                                .zipWith(
                                        Observable.range(1, MAX_RETRIES), (n, i) -> i
                                )
                                .flatMap(
                                        retryCount -> Observable.timer((long) Math.pow(4, retryCount), TimeUnit.SECONDS)
                                )
                )

ZacSweers

  public void readTwice()
  {
              Observable.fromCallable(() -> {
              RedditData inflatedModel = null;
              Response response = makeRequest();

              String diskValue = null;
              try {
                  File file = new File(getContext().getCacheDir(), "file");
                  BufferedSink cacheBody = Okio.buffer(Okio.sink(file));

ZacSweers

#!/bin/bash
#
# DROPKICK.SH 
#
# Detect and Disconnect the DropCam and Withings devices some people are using to
# spy on guests in their home, especially in AirBnB rentals. Based on Glasshole.sh:
#
#   http://julianoliver.com/output/log_2014-05-30_20-52 
#
# This script was named by Adam Harvey (http://ahprojects.com), who also

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/*
 * Copyright (C) 2013 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software

ZacSweers

ZacSweers

import android.support.v4.view.animation.PathInterpolatorCompat;
import android.view.animation.Interpolator;

/**
 * Cheatsheet: http://easings.net/
 */
public class EasingsConstants {
    public static final Interpolator easeInSine = PathInterpolatorCompat.create(0.47f, 0f, 0.745f, 0.715f);
    public static final Interpolator easeOutSine = PathInterpolatorCompat.create(0.39f, 0.575f, 0.565f, 1f);
    public static final Interpolator easeInOutSine = PathInterpolatorCompat.create(0.445f, 0.05f, 0.55f, 0.95f);

ZacSweers

View Click

Instead of the verbose setOnClickListener:

RxView.clicks(submitButton).subscribe(o -> log("submit button clicked!"));

Filter even numbers

Observable
    .just(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)