CompSci 101 Introduction to Computer Science January 22, 2015 Prof. Rodger compsci101 spring151

Announcements Reading, RQ 05 for next time Assignment 2 due Tues APT 1 is due today, APT 2 out compsci101 spring152

REMINDER DO NOT SIT IN THE LAST TWO ROWS! Come forward and sit beside someone you haven’t met compsci101 spring153

How many ways can I run Python in this course? Eclipse –Complete program –Console –APT Online textbook –Beware Python 3 (‘/’ (2.7) vs ‘//’ (3) ) Python Tutor compsci101 spring154

How to get Help in this class Piazza Consulting hours (Sunday-Thursday nights) Office hours (Prof, Tas) What happens if my laptop breaks and I can’t use my eclipse? Do I stop programming? –Clusters, Python Tutor, websubmit, borrow What happens if you send Prof. Rodger an ? 35 support people vs. 1 person, may take awhile to answer compsci101 spring155

Submitting an APT or Assignment Use Ambient – submit –Submit History – files submitted should be listed! –Alternative – use web submit –Tuesday midnight means Tuesday 11:59pm + 1 minute –If you can’t submit on your computer, copy your file to another computer (Link?) and submit with websubmit on that computer compsci101 spring156

Why is this person so important to this course? Have you donated yet? compsci101 spring157

Top 10 list for surving in CompSci Ask questions 9. Eat lots of pizza 8. Learn how to spell Rodger 7. Read the book 6. Do the reading quizzes compsci101 spring158

Top 10 list (cont) 5. Check Piazza every day 4. Visit your prof in her office 3. Learn how to debug your programs 2. Seek help (one hour rule!) 1. Start programming assignments early compsci101 spring159

Algorithm Describe in words how to solve a problem Like a recipe, must be detailed and precice compsci101 spring1510

Whole Genome Shotgun with words bit.ly/101S Creation algorithm –Take a phrase –Replicate it four times –Chop into "chunks" characters Figure out the original phrase Describe the algorithm to recreate original phrase? olve problems. ratively, create, compsci101 we get t 01 we get to work colla vely, create, and s. In compsci1 y, create, and s e get to work collabo … compsci101 spring1511

Review Functions compsci101 spring1512

Use Python Tutor Debug/trace your code Doesn’t work with input files compsci101 spring1513

Assignment 2 How to start? Where does import go? Student work? compsci101 spring1514

Solve an APT - Pancakes bit.ly/101S compsci101 spring1515

Computer Science Alum Biology and CS Undergraduate Research - JFLAP Epic Now in Med School at Vanderbilt compsci101 spring1516

More Computer Science Duke Alums compsci101 spring1517

More on Strings Strings are indexed starting at 0 Example: ‘word’ Use [num] – to refer to a particular character in word Use [x:y] to refer to a slice of the string starting at position x and up to but not including position y. Can leave out x or y. w or d compsci101 spring1518

Examples phrase = "Duke Blue Devils" print phrase[0] print phrase[-3] print phrase[1:3] print phrase[5:10] + phrase[:4] print (phrase[phrase.find('ev'):]).upper() String fun Crazy import compsci101 spring1519

Loop over all characters in a String compsci101 spring1520

Loop over string Online form: compsci101 spring1521

Loop over all words in a list compsci101 spring1522

Loop over words Online form: compsci101 spring1523