dtinth

An Adapter Analogy

Suppose that you have a very old keyboard, which uses a PS/2 port. It is a really good keyboard for gaming but unfortunately, it isn't being manufactured anymore, and you love it very much.

Now also suppose that your favorite PC has died, and you bought a new laptop just to notice that it does not have a PS/2 port anymore. Instead, your laptop has several USB ports.

dtinth

function checkGood(good) { return good; }
function checkBad(good) { return !good; }
function checkAlways(good) { return true; }

function defer() {
	var result = null
	var finish = false
	var good
	var handlers = []

dtinth

Finding Clauses

The teacher emphasized using "keywords" to find clauses, such as "that", "when", "how", "what", "which", "who", "if", and so on. The problem is that those keywords don't always appear.

Usually, the word "that" could be taken out from the sentence.

• He said (that) it worked.
• Pick any color (that) you want!
• You may say (that) I'm a dreamer.

dtinth

$$ \newcommand{\NOT}{{\sim}} \newcommand{\R}{\textbf{ R }} $$

• (f) is one-to-one ( \Leftrightarrow ) ( \forall a,b \in X, f(a) = f(b) \rightarrow a = b )
• (f) is onto ( \Leftrightarrow ) ( \forall y \in Y, \exists x \in X \text{ such that } f(x) = y )
• (f) has one-to-one correspondence ( \Leftrightarrow ) (f) is both one-to-one AND onto.
• (f^{-1}(x)) is the inverse of (f(x)) ( \Leftrightarrow ) ( \forall x \in X, f^{-1}(f(x)) = x )

dtinth

.conversion { width: 100%; margin-bottom: 1em; }
.conversion th { text-align: left; white-space: nowrap; width: 8em; vertical-align: top; }
.conversion tr.site th,
.conversion tr.site td { vertical-align: bottom; }
.conversion .site strong { font-size: 1.5em; }
.conversion ul { margin: 0; }

dtinth

import java.util.Date;

import javax.swing.JFrame;
import javax.swing.JTextArea;


public class WtfWtf {

	// concrete logger but uses different interface
	class UiLogger {

dtinth

<?xml version="1.0"?>
<!DOCTYPE module PUBLIC
  "-//Puppy Crawl//DTD Check Configuration 1.1//EN"
  "http://www.puppycrawl.com/dtds/configuration_1_1.dtd">

<module name="Checker">
  <module name="TreeWalker">
    <property name="tabWidth" value="4"/>

    <module name="MissingOverride"/>

dtinth

import static org.junit.Assert.*;

import org.junit.Test;


public class CallLogTest {

  private CallLog log = new CallLog();

	@Test

dtinth

import java.util.HashMap;

public class AddressBook {

  private HashMap<String, String> map = new HashMap<String, String>();

	public void record(String name, String tel) {
		map.put(name, tel);
	}

dtinth

ติดตั้ง

• ดาวน์โหลดที่: http://clipsrules.sourceforge.net/
• คู่มือ: http://clipsrules.sourceforge.net/documentation/v630/ug.pdf (อธิบายละเอียด อ่านสนุก เขียนเอาฮาเป็นบางครั้ง)

รันโปรแกรม