CompSci 101
Introduction to Computer Science
January 13, 2015
Prof. Rodger
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Announcements
• Reading for next time on calendar page
– RQ 2 due Thursday 10am
• Assignment 1 is out today, due in 1 week
• Labs
– Try to install everything before going to lab
– Practice downloading and running program
– Programming in Scratch
• Today: Problem solving, Scratch, Python
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Visitor today
Prof. Ron Parr
Chair, Computer
Science Department
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How does one get help?
• Consulting hours
– Sunday-Thursday 7-11pm
– (see Help tab)
• Office hours (prof, TAs)
• Piazza
– Ask questions
– Do not post your code and ask what is wrong!
– Post error message and line of code for error
message
– If added class late, may need to add yourself
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Your work in the class
• Lectures/Labs – work in groups
• Assignments/APTs – individual work
– Get help from Prof., TAs, UTAs
– Discuss with others in class the general idea,
but you must write your own code
– Acknowledge anyone you got help from or
consulted with – put in README file
• DO NOT search for answers on the web or
post your code on the web
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Our Programming Environment
• Install 5 items
• Why Java? – not using
• Eclipse – platform for
development
• Python – programming language
• Pydev – Python IDE for Eclipse
• Ambient – turnin/snarf files
to/from Duke
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Last Time - Python code
hello.py
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Last time - Python code
Count 4-letter words in a file.
Questions?
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Design a data file for testing
bit.ly/101S15-0113-01
How many words?
Which words?
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Should you understand all that
code?
• Not yet, this is a beginner class.
• You will be writing code that is much
simpler to start.
• Should understand it by the first exam
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Melinda French Gates
• Duke Alum, CS/Econ major
• Duke Commencement 2013
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Word Clouds
• Number of occurrences/emphasis indicated
by size of word
• Site to make a word cloud:
– wordle.net
• U.S. Presidential Speeches:
– http://chir.ag/projects/preztags/
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Classwork: Word Cloud
http://bit.ly/101S15-0113-02
• Given a file of words
• Discuss how to make a word cloud
– How do you organize the words?
– What information do you need to calculate?
– What do you need to calculate to display words?
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Computer Science and Medicine
Prof. Bruce Donald
Grad Student: Pablo Gainz
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Concepts you'll learn in Compsci
101
• Programming
– Practice, skill, art, science, engineering, creativity
• Problem-solving
– How to solve problems using programming and a
computer
• Impact of computer science
– Scale and automation: powerful forces
• Foundation for future work
– In many areas, not limited to compsci@duke
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Programming Examples
• Scratch example in class (also in lab)
• Hour of code: http://code.org
– Designed for kids, useful to millions
• Assignment 1 - Light-bot
• Python!
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Scratch
scratch.mit.edu
• Demo – build Scratch program
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