Derek Zhu hereisderek

## hackerrank.md

      
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                hackerrank.md
              
          
    hackerrank

My own practice following:
https://www.hackerrank.com/categories/algorithms/warmup
started from Jun 14 2014, finished at, well, I don't know, just started.
Basically, this is what I'll be doing when I got the pulse of playing dota.
Dota will always be the game of my life, best game ever, but I need a little break from it.

  
## designer.html
<link rel="import" href="../ace-element/ace-element.html">

<polymer-element name="my-element">

  <template>
    <style>
      :host {
        position: absolute;
        width: 100%;
        height: 100%;

## Timer.java

import android.support.annotation.IntDef;
import android.support.v4.util.SimpleArrayMap;

import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.util.WeakHashMap;

/**
 * Only used for internal debug timing

## dota2 follow udp stream
....qJ.'.0000000000.....A3IOZ..^&J.'........j..@......k(.........^&J.'.the King has betried his people.799255232881838872.....
..
.
.tv_nochat..0
.
.joy_autoaimdampen..0
'
.name..the King has betried his people
.
.cl_interp_ratio..2

## versions.gradle
/*
 * Copyright (C) 2018 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

## macos 10.14 developer beta 1 category url
https://swscan.apple.com/content/catalogs/others/index-10.14seed-10.14-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog.gz


    catalogs = {"CustomerSeed":"https://swscan.apple.com/content/catalogs/others/index-10.14customerseed-10.14-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog",
                "DeveloperSeed":"https://swscan.apple.com/content/catalogs/others/index-10.14seed-10.14-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog",
                "PublicSeed":"https://swscan.apple.com/content/catalogs/others/index-10.14beta-10.14-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog",
                "PublicRelease":"https://swscan.apple.com/content/catalogs/others/index-10.14-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog"}

## main.dart

abstract class SayI{
  String say();
  String get str;
}

abstract class SayMixinA implements SayI{
  String get str;

  String say() {

## main.dart
void main() {

  /// maps
  /// result:
  ///   map0: {1: 1, 2: 2}
  ///   map1: {1: 1, 2: 2}
  ///   map2: {1: 2, 2: 3}
  Map<String, int> map = {'1' : 1, '2' : 2};
  print('map0: $map');

## flutter log
```
flutter doctor -v
Building flutter tool...
[✓] Flutter (Channel derek/master, v0.8.3-pre.50, on Mac OS X 10.14 18A389, locale en-US)
    • Flutter version 0.8.3-pre.50 at /Volumes/Persistence/Library/Google/flutter
    • Framework revision efab60dbe9 (21 hours ago), 2018-09-12 15:44:23 -0700
    • Engine revision 12315736f9
    • Dart version 2.1.0-dev.4.0.flutter-05ccfa8502

[✓] Android toolchain - develop for Android devices (Android SDK 28.0.2)

## flutter build with multi-dimensional gradle flavor
./gradlew tasks --all[?1l>[?2004l

]2;./gradlew tasks --all]1;./gradlew[0m

[2A[1m<[0;32;1;0;39;1m-------------> 0% CONFIGURING [0s][m[35D[1B[1m> root project > Resolve dependencies of :classpath[m[51D[1B[2A[1m<[0;32;1;0;39;1m-------------> 0% CONFIGURING [0s][m[35D[1B[1m> root project > :app[m[0K[21D[1B[2A[1m<[0;32;1;0;39;1m-------------> 0% CONFIGURING [0s][m[35D[1B[1m> root project > :app[m[21D[1B[2A[1m<[0;32;1;0;39;1m-------------> 0% CONFIGURING [0s][m[35D[1B[1m> root project > :app[m[21D[1B[2A[1m<[0;32;1;0;39;1m-------------> 0% CONFIGURING [0s][m[35D[1B[1m> root project > :app[m[21D[1B[2A[1m<[0;32;1;0;39;1m-------------> 0% CONFIGURING [0s][m[35D[1B[1m> root project > :app[m[21D[1B[2A[1m<[0;32;1;0;39;1m-------------> 0% CONFIGURING [0s][m[35D[1B[1m> root project > :app[m[21D[1B[2A[1m<[0;32;1;0;39;1m-------------> 0% CONFIGURING [0s][m[35D[1B[1m> root project > :app[m[21D[1B[2A[0K
[1m> Configure project :app[m
C
	<link rel="import" href="../ace-element/ace-element.html">

	<polymer-element name="my-element">

	<template>
	<style>
	:host {
	position: absolute;
	width: 100%;
	height: 100%;

	import android.support.annotation.IntDef;
	import android.support.v4.util.SimpleArrayMap;

	import java.lang.annotation.Retention;
	import java.lang.annotation.RetentionPolicy;
	import java.util.WeakHashMap;

	/**
	* Only used for internal debug timing
	....qJ.'.0000000000.....A3IOZ..^&J.'........j..@......k(.........^&J.'.the King has betried his people.799255232881838872.....
	..
	.
	.tv_nochat..0
	.
	.joy_autoaimdampen..0
	'
	.name..the King has betried his people
	.
	.cl_interp_ratio..2
	/*
	* Copyright (C) 2018 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
	https://swscan.apple.com/content/catalogs/others/index-10.14seed-10.14-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog.gz


	catalogs = {"CustomerSeed":"https://swscan.apple.com/content/catalogs/others/index-10.14customerseed-10.14-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog",
	"DeveloperSeed":"https://swscan.apple.com/content/catalogs/others/index-10.14seed-10.14-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog",
	"PublicSeed":"https://swscan.apple.com/content/catalogs/others/index-10.14beta-10.14-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog",
	"PublicRelease":"https://swscan.apple.com/content/catalogs/others/index-10.14-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog"}

	abstract class SayI{
	String say();
	String get str;
	}

	abstract class SayMixinA implements SayI{
	String get str;

	String say() {
	void main() {

	/// maps
	/// result:
	/// map0: {1: 1, 2: 2}
	/// map1: {1: 1, 2: 2}
	/// map2: {1: 2, 2: 3}
	Map<String, int> map = {'1' : 1, '2' : 2};
	print('map0: $map');
	```
	flutter doctor -v
	Building flutter tool...
	[✓] Flutter (Channel derek/master, v0.8.3-pre.50, on Mac OS X 10.14 18A389, locale en-US)
	• Flutter version 0.8.3-pre.50 at /Volumes/Persistence/Library/Google/flutter
	• Framework revision efab60dbe9 (21 hours ago), 2018-09-12 15:44:23 -0700
	• Engine revision 12315736f9
	• Dart version 2.1.0-dev.4.0.flutter-05ccfa8502

	[✓] Android toolchain - develop for Android devices (Android SDK 28.0.2)
	./gradlew tasks --all[?1l>[?2004l

	]2;./gradlew tasks --all]1;./gradlew[0m

	[2A[1m<[0;32;1;0;39;1m-------------> 0% CONFIGURING [0s][m[35D[1B[1m> root project > Resolve dependencies of :classpath[m[51D[1B[2A[1m<[0;32;1;0;39;1m-------------> 0% CONFIGURING [0s][m[35D[1B[1m> root project > :app[m[0K[21D[1B[2A[1m<[0;32;1;0;39;1m-------------> 0% CONFIGURING [0s][m[35D[1B[1m> root project > :app[m[21D[1B[2A[1m<[0;32;1;0;39;1m-------------> 0% CONFIGURING [0s][m[35D[1B[1m> root project > :app[m[21D[1B[2A[1m<[0;32;1;0;39;1m-------------> 0% CONFIGURING [0s][m[35D[1B[1m> root project > :app[m[21D[1B[2A[1m<[0;32;1;0;39;1m-------------> 0% CONFIGURING [0s][m[35D[1B[1m> root project > :app[m[21D[1B[2A[1m<[0;32;1;0;39;1m-------------> 0% CONFIGURING [0s][m[35D[1B[1m> root project > :app[m[21D[1B[2A[1m<[0;32;1;0;39;1m-------------> 0% CONFIGURING [0s][m[35D[1B[1m> root project > :app[m[21D[1B[2A[0K
	[1m> Configure project :app[m
	C