Ching Yi, Chan qrtt1

環境管理的關鍵在於透過完全自動化的流程來建立環境，使建立全新環境總是比修復已受損的既有環境容易許多。重現環境的能力是非常必要的，原因如下：

可以避免知識遺失的問題。例如，某人因離職或無法與他取得聯繫，但只有他明白某個設置所代表的涵意。一旦有此種設置不能正常運作的情況，通常就表示會有較長的停機時間。這是個很巨大不必要的風險。

...

	import java.io.File;
	import java.io.IOException;

	import org.apache.commons.io.FileUtils;
	import org.eclipse.core.runtime.CoreException;
	import org.eclipse.jdt.core.dom.AST;
	import org.eclipse.jdt.core.dom.ASTParser;
	import org.eclipse.jdt.core.dom.ASTVisitor;
	import org.eclipse.jdt.core.dom.CompilationUnit;
	import org.eclipse.jdt.core.dom.FieldDeclaration;

	apply plugin: "java"
	repositories {
	jcenter()
	}

	dependencies {
	compile 'tv.danmaku.ijk.media:ijkplayer-java:0.4.4.1'
	compile 'tv.danmaku.ijk.media:ijkplayer-armv7a:0.4.4.1'
	}

	public class Foo {

	public static void main(String[] args) {
	boolean v = false;
	if (v) {
	System.out.println("OAO");
	return ;
	}
	}

	// reference 1: http://docs.groovy-lang.org/latest/html/api/groovy/time/TimeCategory.html
	// reference 2: http://groovycookbook.org/basic_types/dates_times/

	import groovy.time.TimeCategory

	use ( TimeCategory ) {
	// application on numbers:
	println 1.minute.from.now
	println 10.hours.ago

	/*
	* Copyright (C) 2009 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

	# (DataTransfer, Price) pair
	price_list = ((2, 10), (3, 20), (4, 40), (8, 80), (16, 160), (20, 320), (20, 480), (20, 640), (20, 960))
	for network, price in price_list:
	transfer_in_gb = 1024.0 * network
	print "price level %3d, per gb cost %5.4f" % (price, price / transfer_in_gb)

	## RESULT:
	## price level 10, per gb cost 0.0049
	## price level 20, per gb cost 0.0065
	## price level 40, per gb cost 0.0098