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projects:fsharp_workshop [2015/03/13 23:27] – created mkuciaprojects:fsharp_workshop [2015/04/17 23:03] mkucia
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 ====== F# workshop ====== ====== F# workshop ======
  
-<wrap hi>highlighted</wrap>+===== 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 ===== 
 + 
 +  * hello(x) 
 +  * Type providers (strongly typed) 
 +  * Matching 
 +  * Options 
 + 
 + 
 +===== hello(x) ===== 
 +<code fsharp> 
 +let hello = printf "Hello World" 
 +hello 
 +</code> 
 + 
 +<code fsharp> 
 +let hello x = printfn "Hello %s" x 
 +hello "world" 
 +</code> 
 + 
 +<code fsharp> 
 +let hello x = printfn "Hello %s" x 
 +"World" |> hello 
 +</code> 
 +''|>'' is the pipeline operator 
 + 
 +<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> 
 + 
 +===== Why? =====
  
 <WRAP group> <WRAP group>
 <WRAP half column box> <WRAP half column box>
 Pros: Pros:
 +  * Open Source
 +  * Multi platform (Mono, .NET core)
 +  * Modern, rising popularity
   * Lazy evaluation   * Lazy evaluation
   * Reusable   * Reusable
-  * Reduced code+  * Reduced code (See [[http://theburningmonk.com/2014/12/seven-ineffective-coding-habits-many-f-programmers-dont-have/|signal-to-noise ratio]]) 
 +  * Strongly typed
 </WRAP> </WRAP>
  
 <WRAP half column box> <WRAP half column box>
 Cons: Cons:
-  * Not suitable for real time +  * Not suitable for real time (unpredictable performance) 
-  * requires different thinking+  * Functional languages fundamentally don't model how your computer works ⇒ harder to optimize. 
 +  * Different thinking process (you need to re-learn)
 </WRAP> </WRAP>
 </WRAP> </WRAP>
  
 +===== 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]]
projects/fsharp_workshop.txt · Last modified: 2015/05/02 12:45 by mkucia