Coding Challenge #121: Logo Interpreter

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The Coding Train

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Published on October 31, 2018 2:12:37 PM ● Video Link: https://www.youtube.com/watch?v=i-k04yzfMpw

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Vlog

Duration: 41:07

59,219 views

1,166

In this coding challenge, I discuss turtle graphics and make a Logo Interpreter in JavaScript. Code: https://thecodingtrain.com/challenges/121-logo-interpreter

p5.js Web Editor Sketches:
🕹️ Logo Interpreter Part 1: https://editor.p5js.org/codingtrain/sketches/ryTuOf3gN
🕹️ Logo Interpreter Part 2: https://editor.p5js.org/codingtrain/sketches/BJqG8zhlN

Other Parts of this Challenge:
📺 Part 2: Logo Interpreter: https://youtu.be/aOqEm101fms

🎥 Previous video: https://youtu.be/oCBlwsY8sR4?list=PLRqwX-V7Uu6ZiZxtDDRCi6uhfTH4FilpH
🎥 Next video: https://youtu.be/yLuk0twx8Hc?list=PLRqwX-V7Uu6ZiZxtDDRCi6uhfTH4FilpH
🎥 All videos: https://www.youtube.com/playlist?list=PLRqwX-V7Uu6ZiZxtDDRCi6uhfTH4FilpH

References:
📁 Logo Repo: https://github.com/shiffman/Logo
📓 Logo on Wikipedia: https://en.wikipedia.org/wiki/Logo_(programming_language)
📝 Logo Tutorial: http://cs.brown.edu/courses/bridge/1997/Resources/LogoTutorial.html

Videos:
📓 Transformation Tutorial: https://www.youtube.com/watch?v=o9sgjuh-CBM
📐 Angles and Angular Motion: https://www.youtube.com/watch?v=qMq-zd6hguc
🧾 Angular Motion: https://www.youtube.com/watch?v=i2ROE_mAhU0

Live Stream Archive:
🔴 Coding Train Live 158: https://youtu.be/flHxQpyiDNc
🔴 Coding Train Live 159: https://youtu.be/kLIHhOEPHG0

Timestamps:
0:20 What is Logo?
1:21 Logo commands
2:23 Let's go!
5:04 The turtle object
7:14 Let's code the turtle methods
10:39 Iterating over the tokens
12:51 Understanding the increment operator
14:37 A little debugging
18:55 Found the bug!
20:00 A look-up table
23:44 Real-time interpretation
26:50 Pen up and pen down
37:54 It works!
40:00 Ending remarks
40:33 Thank you for watching!

Editing by Mathieu Blanchette
Animations by Jason Heglund
Music from Epidemic Sound

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#logo #logointerpreter #turtlegraphics #p5js #javascript