Simplee.IO 1.0.7

Koio |> Simple.IO

Library Simplee.IO v1.0.7 implements common IO functionality used by all other Simple projects. The namespace of the library is Simplee.IO.

Here is the main functionality exposed:

1. io monad
2. stdio operations

1. IO Monad

The library exposes a monad for IO. The main functions you can use are iorun which executes an IO flow, iobind which binds an IO monad to a given function. The library exposes a computation buildel, io, which can be used for imperative programing style.

    let flow =  io {
        let! _ = putStrLn "Introduce line 1:"
        let! cs1 = getLine

        let! _ = putStrLn "Introduce line 2:"
        let! cs2 = getLine

        let! _ = putStrLn "You typed:"
        return! putStrLn cs1
        return! putStrLn cs2
        }

    flow |> iorun

2. stdio Operations

As you could see in the above example, the library exposes several convenience methods that allows you to interact with the stdio. All these functions are build on top of the IO monad.

For writing to the stdio, you can use: putChar, putStr, putStrLn. To get the input from stdio, you can use: getChar, getLine, getContent (this last function reads the stdio till the end).

    let lines (s:string) = s.Split([|stdout.NewLine|], StringSplitOptions.None) |> Seq.ofArray
    let length xs = Seq.length xs

    let flow1 =  io {
        let! _ = putStrLn "Introduce line 1:"
        let! cs1 = getLine

        let! _ = putStrLn "Introduce line 2:"
        let! cs2 = getLine

        let! _ = putStrLn "You typed:"
        return! putStrLn cs1
        return! putStrLn cs2
        }

    let flow2 = io {
        let! _ = putStrLn "Test contents:"
        let! cs = getContents
        return! putStr cs
        }

    let flow3 = io {
        let! cs = getContents
        return! cs |> lines |> length |> print
        }

A. Installation

You can install the Simplee.IO nuget package by using one of the following commands:

PM> Install-Package Simplee.IO -Version 1.0.7
> dotnet add package Simplee.IO --version 1.0.7
> paket add Simplee.IO --version 1.0.7