Hadrian Tang Happypig375

Must-have F# libraries

As an aside to all the NuGet packages you use today (almost all of which can be used seamlessly with F#), this appendix contains a list of popular libraries and tools unique to the F# ecosystem. It’s by no means an exhaustive list of all libraries out there (new libraries are always cropping up), but there should be enough here to give you a few ideas of how to start using F# in new and interesting ways.

1. Libraries

First, we’ll cover a whole set of F# libraries that we haven’t touched on yet in this book. But don’t forget the ones we’ve already covered, such as Paket, FSharp.Data, and Canopy! Note that many of these libraries are just that: libraries, not frameworks. They can be used interchangeably in a flexible manner, without forcing you down a specific path. They’re nearly all open source and free to use (available on GitHub and NuGet), and most work cross-platform without relying on Visual Studio tooling.

1.1. Build and DevOps

F#’s unique syntax, scripting, and langua

	/* -------------------------------------------------------------- */
	/* This part serves as a pseudo random number generator for auto grade purpose only */
	/* You are suggested not to refer to these codes in this assignment. */
	/* You are not allowed to use global variables in this course. */
	unsigned int next_num = 1; // Here we initiate an unsigned integer to be used in the following functions.

	unsigned int custom_rand() // This function is used to return a pseudo random number from 0 to 32767.
	{
	next_num = next_num * 1103515245 + 2011;
	return static_cast<unsigned int>(next_num / 65536) % 32768;

	[SharpLab.Runtime.JitGeneric(typeof(int))]
	[SharpLab.Runtime.JitGeneric(typeof(long))]
	[SharpLab.Runtime.JitGeneric(typeof(byte))]
	void f<T>(T x) {
	if (typeof(T) == typeof(bool)) System.Console.WriteLine((bool)(object)x);
	else if (typeof(T) == typeof(int)) System.Console.WriteLine((int)(object)x);
	else if (typeof(T) == typeof(long)) System.Console.WriteLine((long)(object)x);
	}
	[SharpLab.Runtime.JitGeneric(typeof(int))]
	[SharpLab.Runtime.JitGeneric(typeof(long))]

	// Code // Usual function name // "Bird"
	let I x = x // id (FSharp.Core) // Identity bird, or the Idiot bird
	let K x y = x // konst (FSharpPlus) // the Kestrel
	let M x y = x (x y) // twice // the Mockingbird
	let T x y = y x // \|> (FSharp.Core) // the Thrush
	let Q x y z = y (x z) // >> (FSharp.Core) // the Queer bird
	let S x y z = x z (y z) // apply (applicative) // the Starling
	let rec Y f x = f (Y f) x // fix (FSharpx.Extras) // the Sage bird

	// More combinators not mentioned in F# for Fun and Profit

	創意思維
	(Creative Thinking)

	溝通和協作
	(Communication & Collaboration)

	基礎算法
	(Basic Algorithms)

	解難技巧及編程

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