InfoQ Homepage Presentations Why is a Monad Like a Writing Desk?
Why is a Monad Like a Writing Desk?
30:38
Summary
Carin Meier tells the story of Alice discovering Monads, meeting three types of monads – Identity, Maybe, State-, and learning how to implement them in Clojure.
Bio
Carin Meier is a software developer at EdgeCase. She started off as a professional ballet dancer, studied Physics in college, and has been developing software for both the enterprise and entrepreneur for the past 15 years. She comes from a solid Java background, but has discovered a passion for the simplicity, power, and elegance of Clojure.
About the conference
Clojure/West is a new conference bringing the Clojure community together to discuss techniques, tools, and the state of the Clojure ecosystem March 16-17th for three tracks of sessions. Prior to the conference, register for three days of training by the Clojure experts.
May 22, 2012
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Community comments
Great!
by Matjaz Muhic,
Nice!
by Faisal Waris,
Very good!
by Paulo Pinto,
Must watch!
by vitalii voloshyn,
m-tea question
by Volodymyr Vitvitskyi,
Re: m-tea question
by Eric Scrivner,
Re: m-tea question
by Volodymyr Vitvitskyi,
The mysterious red book
by Tor Gausen,
Re: The mysterious red book
by Carin Meier,
Great!
by Matjaz Muhic,
Your message is awaiting moderation. Thank you for participating in the discussion.
Excellent. I thought "this woman is gonna be soooo boring" at first but then she surprised me... :)
Nice!
by Faisal Waris,
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I struggled with monads too.
Despite the presenters reservations, here is blog post that I hope will be helpful too:
fwaris.wordpress.com/2011/07/30/understanding-m...
Very good!
by Paulo Pinto,
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Thanks for the nice presentation, it was very good.
I feel it is a video I can refer other people to, when they need to learn about monads.
Must watch!
by vitalii voloshyn,
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This talk is soooo coool! Carin not only explained monads very nicely, but also showed how stories really help problem solving)))
m-tea question
by Volodymyr Vitvitskyi,
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We call m-tea with one parameter "you" (seems to be name) while we have declared this functions with two parameters. How does it work ?
Thanks
Re: m-tea question
by Eric Scrivner,
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The key part is the "thrush" or threading operator ->
This is a convenience operator for composing "thread" a value through a series of functions. -> Uses the first value as the first parameter to the functions which follow it. There is also a variant ->> which uses the first value as the last parameter to the functions that follow it.
So
((-> (return "me") (m-tea "you")))
Is really be evaluated as:
((m-tea (return "me") "you"))
Re: m-tea question
by Volodymyr Vitvitskyi,
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Thank you a lot
The mysterious red book
by Tor Gausen,
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Best introduction to monads I've seen so far. I still don't quite get the whole thing about monads though.
I know I'm two years late, but what is that red book on top of the pile?
Re: The mysterious red book
by Carin Meier,
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It is Alice in Wonderland :)