Coding Dojo: Bank OCR (2014)
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The document summarizes a coding dojo session led by Peter Kofler on parsing bank account numbers from an optical character recognition (OCR) file. The session followed a structured format including introductions, coding periods with retrospectives, and a closing circle. Participants were assigned to write a program to take an OCR file with account numbers represented as pipes and underscores and parse it into actual numbers, with considerations for readability, matching digits, and flexibility. The goal was to focus on doing the assignment perfectly rather than just getting it done.
Coding Dojo: Bank OCR (2014)
- 1. Coding Dojo: Bank OCR Austrian Institute of Technology September 2014 Peter Kofler, ‘Code Cop’ @codecopkofler www.code-cop.org Copyright Peter Kofler, licensed under CC-BY.
- 2. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Peter Kofler • Ph.D. (Appl. Math.) • Professional Software Developer for 15 years • “fanatic about code quality” • I help development teams
- 4. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Coding Dojo Mindset ● Safe place outside work ● We are here to learn ● Need to slow down ● Focus on doing it right ● Collaborative Game
- 5. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Dojo Structure ● Introduction 15' ● Coding 45' ● Interim (Retrospective) 15' ● Break 10' ● Coding 45' ● Retrospective 15'
- 6. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Assignment
- 7. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Bank OCR ● You work for a bank, which has a machine to assist in reading letters. The machine scans the paper documents, and produces a file with a number of entries which each look like this: ····_··_·····_··_··_··_··_· ··|·_|·_||_||_·|_···||_||_| ··||_··_|··|·_||_|··||_|·_| ··························· ● Each entry is 4 lines long, each line has 27 characters. The first 3 lines contain an account number written using pipes and underscores, and the fourth line is blank. Each account number should have 9 digits, all of which should be in the range 1-9.
- 8. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Bank OCR ● Write a program that can take this file and parse it into actual account numbers. ● Find a pair. ● Choose a programming language. ● Set up the environment. ● Start with creating a test.
- 9. Don't Focus on Getting it Done. F0cus on Doing It Perfectly.
- 10. → Practice
- 11. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Bank OCR considerations ● Which algorithm did you chose? ● How readable are your test cases? (Can you look at them and easily see which digits are being parsed?) ● How do you match digits? (Are you using low level Ifs or high level patterns to match?) ● Functional or imperative? (Do you use iteration or recursion?) ● What if the input changes? (What about the style of digits, number of digits, ...)
- 12. → Practice
- 13. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Closing Circle ● What did you learn today? ● What surprised you today? ● What will you do differently in the future?
- 14. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Peter Kofler @codecopkofler www.code-cop.org
- 15. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY CC Images ● Bank https://www.flickr.com/photos/bigmacsc99/4325336251 ● Dojo http://www.flickr.com/photos/49715404@N00/3267627038/ ● Todos http://www.flickr.com/photos/kylesteeddesign/3724074594/ ● Wants you http://www.flickr.com/photos/shutter/105497713/