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So Easy You Can Even Do It In JavaScript: Event...
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PyCon 2013
March 16, 2013
Programming
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So Easy You Can Even Do It In JavaScript: Event-Driven Architecture For Regular Programmers by Glyph
PyCon 2013
March 16, 2013
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Transcript
EVENT DRIVEN ARCHITECTURE It Is The Hardest Thing You Will
Never Figure it Out I Mean What Does “Asynchronous” Even Mean Is That Even A Real Word Saturday, March 16, 13
EVENT DRIVEN ARCHITECTURE For Regular Programmers Saturday, March 16, 13
EVENT DRIVEN ARCHITECTURE So Easy You Can Even Do It
In JavaScript Saturday, March 16, 13
W ARNING Saturday, March 16, 13
THINGS THAT ARE HARD IN JAVASCRIPT Saturday, March 16, 13
• Comparing Arrays THINGS THAT ARE HARD IN JAVASCRIPT Saturday,
March 16, 13
• Comparing Arrays • Adding Numbers THINGS THAT ARE HARD
IN JAVASCRIPT Saturday, March 16, 13
• Comparing Arrays • Adding Numbers • Defining Types THINGS
THAT ARE HARD IN JAVASCRIPT Saturday, March 16, 13
• Comparing Arrays • Adding Numbers • Defining Types •
Loading Modules THINGS THAT ARE HARD IN JAVASCRIPT Saturday, March 16, 13
THINGS THAT ARE EASY IN JAVASCRIPT Saturday, March 16, 13
• Calling Functions THINGS THAT ARE EASY IN JAVASCRIPT Saturday,
March 16, 13
• Calling Functions • Handling Events THINGS THAT ARE EASY
IN JAVASCRIPT Saturday, March 16, 13
THE ONLY THING THAT IS EASY IN JAVASCRIPT CALLING FUNCTIONS
Saturday, March 16, 13
A TALE OF TWO EVENTS • ASYNCHRONOUS I/O • CLICKY
BUTTONS Saturday, March 16, 13
A TALE OF TWO EVENTS • CLICKY BUTTONS • ASYNCHRONOUS
I/O Saturday, March 16, 13
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? ? ? Saturday, March 16, 13
When X ↓ Do Y Saturday, March 16, 13
When a REST API service endpoint result for the requested
data is available ↓ Do manipulate a model object of the appropriate type based on that data Saturday, March 16, 13
When I Click ↓ Do Say “Hi” Saturday, March 16,
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PyJS http://pyjs.org/ Saturday, March 16, 13
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NUMBER GUESSER binary search as implemented by human user Saturday,
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JAN KEN PON the ultimate distillation of human conflict Saturday,
March 16, 13
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TWISTED http://twistedmatrix.com Saturday, March 16, 13
KLEIN https://github.com/twisted/klein Saturday, March 16, 13
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WHAT IS EVENT DRIVEN an event is just a function
call that you asked for Saturday, March 16, 13
THINK OF A FUNCTION what do you want to happen?
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WHEN THE USER CLICKS THIS BUTTON please call this function
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WHEN THE USER ANSWERS THIS QUESTION please call this function
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WHEN THE NETWORK ANSWERS THIS QUESTION please call this function
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WHEN THE NETWORK SENDS ME SOME DATA please call this
function Saturday, March 16, 13
THE NETWORK IS JUST A USER on the other side
of the planet or on the other side of the screen Saturday, March 16, 13
THANK YOU Saturday, March 16, 13
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