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fix: add flap to Reader
Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com>
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README.md
13
README.md
@@ -14,6 +14,8 @@ go get github.com/IBM/fp-go
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Refer to the [samples](./samples/).
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Find API documentation [here](https://pkg.go.dev/github.com/IBM/fp-go)
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## Design Goal
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This library aims to provide a set of data types and functions that make it easy and fun to write maintainable and testable code in golang. It encourages the following patterns:
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@@ -192,3 +194,14 @@ this would be the completely generic method signature for all possible monads. I
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This FP library addresses this by introducing the HKTs as individual types, e.g. `HKT[A]` would be represented as a new generic type `HKTA`. This loses the correlation to the type `A` but allows to implement generic algorithms, at the price of readability.
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For that reason these implementations are kept in the `internal` package. These are meant to be used by the library itself or by extensions, not by end users.
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## Map/Ap/Flap
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The following table lists the relationship between some selected operators
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| Opertator | Parameter | Monad | Result |
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| -------- | ---------------- | --------------- | -------- |
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| Map | `func(A) B` | `HKT[A]` | `HKT[B]` |
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| Chain | `func(A) HKT[B]` | `HKT[A]` | `HKT[B]` |
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| Ap | `HKT[A]` | `HKT[func(A)B]` | `HKT[B]` |
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| Flap | `A` | `HKT[func(A)B]` | `HKT[B]` |
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