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https://github.com/typelift/Swiftx

Functional data types and functions for any project
https://github.com/typelift/Swiftx

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Functional data types and functions for any project

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Swiftx

======



Swiftx is a Swift library containing functional abstractions and extensions to

the Swift Standard Library.  Swiftx is a smaller and simpler way to introduce pure functional 

datatypes into any codebase.



For a more full-featured library checkout [Swiftz](https://github.com/typelift/swiftz).



Setup

-----



Swiftx can be included one of two ways:



**Framework**



- Drag `Swiftx.xcodeproj` or `Swiftx-iOS.xcodeproj` into your project tree as a subproject

- Under your project's Build Phases, expand Target Dependencies

- Click the + and add Swiftx

- Expand the Link Binary With Libraries phase

- Click the + and add Swiftx

- Click the + at the top left corner to add a Copy Files build phase

- Set the directory to `Frameworks`

- Click the + and add Swiftx



**Standalone**



- Copy the swift files under `Swiftx/Swiftx` into your project.



Introduction

------------



Swiftx provides a number of common data types and abstractions any codebase can utilize.



A small example:



```swift

import Swiftx



let str : String? = .Some("Hello ")

let greeting = (+"World") <^> str // .Some("Hello World")

```



Seamless interaction with existing platform libraries is also possible with

minimal effort:



```swift

import Foundation

import struct Swiftx.Result



/// result now contains either an array of file paths or the error generated by `NSFileManager`.

let result : Result<[String]> = from({ ep in

    let documentsDirectory : String = (NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as String)

    return (NSFileManager.defaultManager().contentsOfDirectoryAtPath(documentsDirectory, error: ep) as [String]?) ?? []

})

```



Swiftx can even help with expressions of nothingness or errors:



```swift

import Swiftx



/// We may not be able to do what we said we'd do, but this definition compiles. At runtime, 

/// any code that invokes this function will immediately halt the program.

func provePEqualsNP() -> Proof
 {

    return undefined()

}

```



System Requirements

===================



Swiftx supports OS X 10.9+ and iOS 8.0+.



License

=======



Swiftx is released under the BSD license.