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--- projects:fsharp_workshop [2015/03/13 23:35] – mkucia
+++ projects:fsharp_workshop [2015/04/18 17:32] – mkucia
@@ Line 1: / Line 1: @@
 ====== F# workshop ======
+{{:projects:fsharp_logo.png?nolink|}}
+===== Prerequisites =====
+    * https://www.linqpad.net/ or anything that can execute a REPL((Read, Evaluate, Print Loop))
+<hidden ↘ alternatives>
+    * Try F# in browser: http://www.tryfsharp.org/Create
+    * Use Visual Studio https://www.visualstudio.com/
+    * Get a full distribution: http://fsharp.org/use/windows/ OR http://fsharp.org/use/linux/
+</hidden>
+===== Agenda =====
-  * f(x) = Hello_Word
+  * hello(x)
-  * On Testing and
+  * Type providers (strongly typed)
+  * Matching
+  * Options
-<wrap hi>highlighted</wrap>
+===== hello(x) =====
+<code fsharp>
+let hello = printf "Hello World"
+hello
+</code>
+F# (pronounced “F Sharp”) is
 <WRAP group>
 <WRAP half column box>
-Pros:
   * Open Source
-  * Multi platform (Mono, .NET core)
+  * Multi platform
-  * Modern, rising usage
+  * Modern, rising popularity
-  * Lazy evaluation
+  * Lazy evaluated
   * Reusable
-  * Reduced code
+  * Concise (See [[http://theburningmonk.com/2014/12/seven-ineffective-coding-habits-many-f-programmers-dont-have/|signal-to-noise ratio]])
   * Strongly typed
+  * Functional first
+    * Use functional to write easy to test and understand code
+    * Use imperative for performance and compatibility
+    * Use objective for organization and encapsulation
+  * Compiled
 </WRAP>
 <WRAP half column box>
-Cons:
+  * Not suitable for real time (unpredictable performance)
-  * Not suitable for real time
+  * Hard to optimize (Functional languages fundamentally don't model how your computer works)
-  * requires different thinking
+  * Functional first (different thinking process, you will need to re-learn)
 </WRAP>
 </WRAP>
+programming language for writing simple code to solve complex problems.
+<code fsharp>
+let hello x = printfn "Hello %s" x
+hello "world"
+</code>
+Introducing pipeline operator:
+<code fsharp>
+let hello x = printfn "Hello %s" x
+"World" |> hello
+</code>
+<hidden pipeline operator definition>
+How to define the operator?
+<code fsharp>
+let inline (|>) x f = f x
+</code>
+</hidden>
+<code fsharp>
+let square x = x * x
+let subtract x y = x - y
+</code>
+<code fsharp>
+let ``complicated stuff`` x =
+    printfn "%d" (add 5 (square x))
+</code>
+<code fsharp>
+let ``another complicated stuff`` x =
+    x |> square |> subtract 5 |> printfn "%d"
+</code>
+<code fsharp>
+let equation x =
+	x
+	|> (fun y -> y * y )
+	|> (fun y z -> y - z ) 5
+	|> printfn "%d"
+</code>
+Note that F# uses indentation to indicate block structure. Find out more [[http://fsharpforfunandprofit.com/posts/fsharp-syntax/|here]].
-<hidden ↘ C# equivalent>Since you want to know more, here is an explanation with more details […]</hidden>
+===== References =====
+  * http://fsharp.org/
+  * http://fsharp3sample.codeplex.com/wikipage?Title=MicroSamples
+  * http://en.wikibooks.org/wiki/F_Sharp_Programming
+  * http://fsharp.org/specs/language-spec/3.0/FSharpSpec-3.0-final.pdf
+  * http://www.mindscapehq.com/blog/index.php/2012/03/27/5-12-f-features-every-c-programmer-should-lust-after/
+  * [[https://msdn.microsoft.com/en-us/library/dd233228.aspx|MSDN Symbol and Operator Reference (F#)]]
+  * https://github.com/rookboom/SharpShaders/wiki/Why-write-shaders-in-F%23%3F
+  * http://www.quora.com/What-are-some-limitations-disadvantages-of-functional-programming
+  * http://fsharpforfunandprofit.com/site-contents/
+  * http://research.microsoft.com/en-us/projects/kiwi/
+  * [[https://www.youtube.com/watch?v=hMjv8m--W28|Ten things F# can do, and C# can't - Liam McLennan @ DDD Brisbane 2013]]