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A Fistful of Ideas

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Quiz set-up Hats off/backwards (brims and hoods)

Technology and notes put away

On your desk Single piece of standard-sized paper pen/pencil

eraser if you like, but faster to scratch out

About your paper Name and student ID on paper

Eyes on your own paper

Protect your paper

Please write neatly

Turn over after done checking your answer

Question? Raise your hand and well come over

Remember Partial credit do your best

We grade gently2

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Quiz1. Apply the Strategy Pattern to the code below so that customers can

also use MasterCard, AmEx, etc. credit cards to make purchases.

class VisaCard { boolean validateCSC(int csc) {} }

class CustomerAcct{private VisaCard card;CustomerAcct (VisaCard card) { this.card = card; }boolean acceptCSC(int csc) {return card.validateCSC(csc);

}

2. Draw class diagrams for the above code and your Strategy solution.

3. Using my ten-cent OOD method, provide a class design (classes,fields, and method in te r faces) for the given BDD scenario:

Givena wizard named HarryAnd a wizard named HermioneWhen the wizards meetThen a spark occurs

You can use either UML or code, but no method bodies, please. 3

CSC = Card Security CodeOOD = Object-Oriented Design

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Discussion1. Apply the Strategy Pattern to the code below so that customers can

also use MasterCard, AmEx, etc. credit cards to make purchases.

interface CardType { boolean validateCSC(int csc); }

class VisaCard implements CardType { boolean validateCSC(int csc) {} }

class MasterCard implements CardType { }

class CustomerAcct{private CardType card;CustomerAcct (CardType card) { this.card = card; }boolean acceptCSC(int csc) {return card.validateCSC(csc);

}

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Discussion2. Draw class diagrams for the above code and your Strategy solution.

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_____CreditCard_____b oo l va lid a teC SC (in t )

______VisaCard______bool validateCSC(int)

____MasterCard_____bool validateCSC(int)

____CustomerAcct____

- CardType card______bool acceptCSC(int)

(a fte r c a se o nly )

(Rec a ll tha t Powe rPo int do e sn t ha ve the op en a rrow ,

so he re Im using a c lo sed a rrow fo r sub c la ss, a nd a

swoo p ed a rrow fo r c om p oses)

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Quiz3. Using my ten-cent OOD method, provide a class design (classes,

fields, and method in te r faces) for the given BDD scenario:Givena wizard named HarryAnd a wizard named HermioneWhen the wizards meet

Then a spark occurs

You can use either UML or code, but no method bodies, please.

w iza rd

sparkwizards

class Wizard {private String name;

Wizard(String name);String getName();}

class Wizards {

List wizards;

} 6

CSC = Card Security CodeOOD = Object-Oriented Design

WizardTracker {private Wizards wizards;boolean meet(Wizard a, b); // might make/trigger spark

}

class Spark {void occurs();

}

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Remember

Yes, its hard too hard for most people to t ry

thats why youre in college

youre the top of the top 10%

thats why the pay is high and the jobs easy to get

If I didnt have you learn it, Id be cheating you

Well keep at it until you master it

stakes are low in quizzes: 2% and we drop one

graded gently

I only curve your grade up, never down

well get you ready for final

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Your Resume, Today

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Things you can put on your resume now

Technologies

Java, Android, Google App Engine

Tools

Eclipse, JUnit, JIRA, GIT, Android ADT

Techniques

Agile Software Process, BDD

Basic OOD, Design Patterns

Mobile software development

Course

Software Engineering (CSE 110)

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Keep Change - Start

96 responses

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Keep Change Start

Keep

Clicker questions, Labs, Reading quizzes, Piazza

Change

Adaptive reading quizzes (need more time)

Clicker questions take too long (e.g., ask for answers) In-class quizzes are too difficult

Start

Better labs: error-free, clearer

Discuss Android development in class

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Keep Change Start

Adaptive reading quizzes (need more time) The adaptive quiz gave 4 minutes/question

Required about 15 clicks I encourage you to do reading and understand it before

starting quiz

Each quiz is worth 0.3% of grade; drop 2 lowest

Clicker Qs take too long (e.g., ask for answers) Ive been speeding up, I hope you noticed

I havent asked for answers in over two weeks (day 7)

Generally only ask for answers on tradeoff questions

In-class quizzes are too difficult

(Already discussed)

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Keep Change Start

Better labs: error-free, clearer Yes, Im sorry, were trying really hard

Google is a real problem

Only one lab left!

How some of you could help: read the lab, dont just cut-and-paste as fast as you can

Discuss Android development in class Covered in Discussion and Lab

Do need to teach software engineering, too

Android also here! We did Android Listener, integrate with GoogleMap

Callbacks and Observer pattern central to Android

Strategy pattern is central to LocationProvider (e.g.)

The preference for Interfaces over subclassing

Want more Android? The web is full of tutorials (video, too)13

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Always Runnable

Slow and steady wins the race

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Agile and A lw a ys Runna b le

If your app is running, you can confidentlydevelop, test, debug, and demo

If it doesnt run after adding new story, no fear Roll back, debug new code, etc.

Failed tests, new bugs are due to new storyNarrows search, code still familiar

Can demo your new story right away Self, teammates, customer

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A lw a ys Runna b le: How

User story is a new thing the user can do with app So it should be demo-able, system testable, etc.

Keep stories small But tendency is to make them too big

Implement story in runnable order dont do all the logic, then all the UI, etc.

do enough of each to get essence of it running

then add on the remainder bit by bit, always runnable

Test as you go Dont check-in code until system tests run

If the system tests dont pass, then it doesnt run

Debug immediately, while fresh on your mind16

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Lets do this

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The sum is greater than its parts

Respect

Planning

Language

Negotiation

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Ind iv id ua l c omm itm ent to a g ro up e f fo rt tha t is

w ha t m a kes a tea m w o rk, a c om p a ny w o rk, a

so c ie ty w o rk, a c iviliza t io n w o rk.

- Vince Lombardi

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Respect

All human beings are deserving of respect including the ones on your team ;)

polite, friendly, considerate on time, etc.

Embrace diversity different people have different skills or preferences

makes the team more capable, versatile, energetic

Dont rush to judgment unique people face unique challenges

your compassion should earn respect

Dont abuse your teams goodwill Put in the effort

Und e r p rom ise a nd o ve r d e live r

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Planning

Not like hacking with your best friend

Teams of size six wont naturally coordinate Plan your stand-ups

Plan your coding sessions

Plan your testing

Plan your delivery session

Respect can be planned, too

Frank but respectful discussion at stand-ups Take meals together, do something fun together

Will go a long way towards the respect thing

Rotate pairs on tasks so that everyone works witheveryone

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Language and Body Postures

Listen more than you talk Respond to what you hear, dont change subject

Ask questions

Avoid talking over, interrupting

Avoid: ultimatums, confrontational language

Anti-team language:

No, w ro ng , d o n t , neve r Answer with But

Pro-team language:

Ye s, I se e , I (d o n t ) und e rsta nd , Ca n you exp la in?, I se ew here yo u re c om ing from

Answer with And

Avoid: crossed arms, leaning back, frowning, shaking head

Try: uncrossed arms, leaning forward, smiling, nodding21

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Negotiation

Respect and planning arent enough

True conflicts arise

I want to learn the Android map control you want easy tasks and are expert at it

Who will get to code it?

Negotiate it Take turns!

Pair program together!

Horse trade

Is something else easy for you, too? Something else you could trade for?

A very creative process

Beware long-term trades: Yo u d o the f irst p ha se a nd I lld o the sec ond p ha se Any error in planning will mean you do the second phase, too

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Trouble-shooting the dysfunctional team

People being mean to each other

Re sp e c t p ro b lem how can we rebuild it?

Some one is moody and sulking

Re sp e c t p ro b lem ? Talk about it.

Not g e t ting w ha t he w a nts from p ro je c t? Negotiate!

A pair never contributes b/c they alwayshave an exam to study for?

1. Rotate pair-programming teams

2. Negotiate

3. Suggest a meeting with me

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Take-Aways

Planning

Effort

and Respect

Are an unbeatable combination

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