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Learning Functional Programming in Go

You're reading from   Learning Functional Programming in Go Change the way you approach your applications using functional programming in Go

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Product type Paperback
Published in Nov 2017
Publisher Packt
ISBN-13 9781787281394
Length 670 pages
Edition 1st Edition
Languages
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Author (1):
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Lex Sheehan Lex Sheehan
Author Profile Icon Lex Sheehan
Lex Sheehan
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Table of Contents (13) Chapters Close

Preface 1. Pure Functional Programming in Go 2. Manipulating Collections FREE CHAPTER 3. Using High-Order Functions 4. SOLID Design in Go 5. Adding Functionality with Decoration 6. Applying FP at the Architectural Level 7. Functional Parameters 8. Increasing Performance Using Pipelining 9. Functors, Monoids, and Generics 10. Monads, Type Classes, and Generics 11. Category Theory That Applies 12. Miscellaneous Information and How-Tos

Functional composition in the context of a legal obligation


Assume that Larry agreed to pay Lucy $5,000 by 1st October and that date has passed. Lucy wants to get paid $5,000 and Larry wants to pay her, but he does not have the money.

Should Lucy sue Larry to get him to pay?

The following category diagram describes their situation:

The category states are as follows:

  • A = Where we are today (12th October)
  • B = Lucy demands a lawsuit
  • C = Lucy gets paid

The category morphisms are as follows:

  • f =  Legal expense (for both, $2,000+)
  • g = Larry pays Lucy $5,000
  • h = Larry pays Lucy $5,000

Decisions determine state transitions

If Larry, in good faith, communicates the following to Lucy, which path will Lucy take?

To be clear, I'm simply asking for more time to pay or for you to allow me to make scheduled payments directly to you without going through the court system. Your thoughts? Larry

It's obvious that these two will eventually get from A to C, but which path is the shortest? Which path is more costly, both...

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