🗊Презентация F# Succinct, Expressive, Functional

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F# Succinct, Expressive, Functional, слайд №1F# Succinct, Expressive, Functional, слайд №2F# Succinct, Expressive, Functional, слайд №3F# Succinct, Expressive, Functional, слайд №4F# Succinct, Expressive, Functional, слайд №5F# Succinct, Expressive, Functional, слайд №6F# Succinct, Expressive, Functional, слайд №7F# Succinct, Expressive, Functional, слайд №8F# Succinct, Expressive, Functional, слайд №9F# Succinct, Expressive, Functional, слайд №10F# Succinct, Expressive, Functional, слайд №11F# Succinct, Expressive, Functional, слайд №12F# Succinct, Expressive, Functional, слайд №13F# Succinct, Expressive, Functional, слайд №14F# Succinct, Expressive, Functional, слайд №15F# Succinct, Expressive, Functional, слайд №16F# Succinct, Expressive, Functional, слайд №17F# Succinct, Expressive, Functional, слайд №18F# Succinct, Expressive, Functional, слайд №19F# Succinct, Expressive, Functional, слайд №20F# Succinct, Expressive, Functional, слайд №21F# Succinct, Expressive, Functional, слайд №22F# Succinct, Expressive, Functional, слайд №23F# Succinct, Expressive, Functional, слайд №24F# Succinct, Expressive, Functional, слайд №25F# Succinct, Expressive, Functional, слайд №26F# Succinct, Expressive, Functional, слайд №27F# Succinct, Expressive, Functional, слайд №28F# Succinct, Expressive, Functional, слайд №29F# Succinct, Expressive, Functional, слайд №30F# Succinct, Expressive, Functional, слайд №31F# Succinct, Expressive, Functional, слайд №32F# Succinct, Expressive, Functional, слайд №33F# Succinct, Expressive, Functional, слайд №34F# Succinct, Expressive, Functional, слайд №35F# Succinct, Expressive, Functional, слайд №36F# Succinct, Expressive, Functional, слайд №37F# Succinct, Expressive, Functional, слайд №38F# Succinct, Expressive, Functional, слайд №39F# Succinct, Expressive, Functional, слайд №40F# Succinct, Expressive, Functional, слайд №41F# Succinct, Expressive, Functional, слайд №42F# Succinct, Expressive, Functional, слайд №43F# Succinct, Expressive, Functional, слайд №44F# Succinct, Expressive, Functional, слайд №45
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Слайды и текст этой презентации

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F# Succinct, Expressive, Functional The F# Team Microsoft Developer Division Microsoft Research
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F# Succinct, Expressive, Functional The F# Team Microsoft Developer Division Microsoft Research

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Topics What is F# about? Some Simple F# Programming A Taste of Parallel/Reactive with F#
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Topics What is F# about? Some Simple F# Programming A Taste of Parallel/Reactive with F#

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What is F# about? Or: Why is Microsoft investing in functional programming anyway?
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What is F# about? Or: Why is Microsoft investing in functional programming anyway?

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Simplicity
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Simplicity

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Economics
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Economics

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Programmer Productivity
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Programmer Productivity

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Simplicity
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Simplicity

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Code! //F# open System let a = 2 Console.WriteLine a
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Code! //F# open System let a = 2 Console.WriteLine a

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Pleasure Pleasure
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Pleasure Pleasure

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Pleasure Pleasure
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Pleasure Pleasure

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Pleasure Pleasure
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Pleasure Pleasure

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Economics
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Economics

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Programmer Productivity
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Programmer Productivity

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People
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People

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F#: Influences
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F#: Influences

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F#: Combining Paradigms
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F#: Combining Paradigms

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F#: The Combination Counts!
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F#: The Combination Counts!

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The Path to Mastering F#
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The Path to Mastering F#

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Quick Tour
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Quick Tour

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Quick Tour
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Quick Tour

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Orthogonal & Unified Constructs Let “let” simplify your life…
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Orthogonal & Unified Constructs Let “let” simplify your life…

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Demo: Let’s WebCrawl…
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Demo: Let’s WebCrawl…

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Orthogonal & Unified Constructs Functions: like delegates + unified and simple
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Orthogonal & Unified Constructs Functions: like delegates + unified and simple

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F# - Functional let f x = x+1 let pair x = (x,x) let fst (x,y) = x let data = (Some [1;2;3], Some [4;5;6]) match data with | Some(nums1), Some(nums2) -> nums1 @ nums2 | None, Some(nums) -> nums | Some(nums), None -> nums | None, None -> failwith "missing!"
Описание слайда:
F# - Functional let f x = x+1 let pair x = (x,x) let fst (x,y) = x let data = (Some [1;2;3], Some [4;5;6]) match data with | Some(nums1), Some(nums2) -> nums1 @ nums2 | None, Some(nums) -> nums | Some(nums), None -> nums | None, None -> failwith "missing!"

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F# - Functional List.map Seq.fold Array.filter Lazy.force Set.union Map LazyList Events Async... [ 0..1000 ] [ for x in 0..10 -> (x, x * x) ] [| for x in 0..10 -> (x, x * x) |] seq { for x in 0..10 -> (x, x * x) }
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F# - Functional List.map Seq.fold Array.filter Lazy.force Set.union Map LazyList Events Async... [ 0..1000 ] [ for x in 0..10 -> (x, x * x) ] [| for x in 0..10 -> (x, x * x) |] seq { for x in 0..10 -> (x, x * x) }

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Immutability the norm…
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Immutability the norm…

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In Praise of Immutability Immutable objects can be relied upon Immutable objects can transfer between threads Immutable objects can be aliased safely Immutable objects lead to (different) optimization opportunities
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In Praise of Immutability Immutable objects can be relied upon Immutable objects can transfer between threads Immutable objects can be aliased safely Immutable objects lead to (different) optimization opportunities

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F# - Lists open System.IO let rec allFiles(dir) = [ for file in Directory.GetFiles(dir) do yield file for sub in Directory.GetDirectories(dir) do yield! allFiles(sub) ] allFiles(@"C:\Demo")
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F# - Lists open System.IO let rec allFiles(dir) = [ for file in Directory.GetFiles(dir) do yield file for sub in Directory.GetDirectories(dir) do yield! allFiles(sub) ] allFiles(@"C:\Demo")

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F# - Sequences open System.IO let rec allFiles(dir) = seq { for file in Directory.GetFiles(dir) do yield file for sub in Directory.GetDirectories(dir) do yield! allFiles(sub) } allFiles(@"C:\WINDOWS") |> Seq.take 100 |> show
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F# - Sequences open System.IO let rec allFiles(dir) = seq { for file in Directory.GetFiles(dir) do yield file for sub in Directory.GetDirectories(dir) do yield! allFiles(sub) } allFiles(@"C:\WINDOWS") |> Seq.take 100 |> show

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Weakly Typed? Slow? //F# #light open System let a = 2 Console.WriteLine(a)
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Weakly Typed? Slow? //F# #light open System let a = 2 Console.WriteLine(a)

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F# Succinct, Expressive, Functional, слайд №31
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Objects
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Objects

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F# - Objects + Functional type Vector2D(dx:double,dy:double) = member v.DX = dx member v.DY = dy member v.Length = sqrt(dx*dx+dy*dy) member v.Scale(k) = Vector2D(dx*k,dy*k)
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F# - Objects + Functional type Vector2D(dx:double,dy:double) = member v.DX = dx member v.DY = dy member v.Length = sqrt(dx*dx+dy*dy) member v.Scale(k) = Vector2D(dx*k,dy*k)

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F# - Objects + Functional type Vector2D(dx:double,dy:double) = let norm2 = dx*dx+dy*dy member v.DX = dx member v.DY = dy member v.Length = sqrt(norm2) member v.Norm2 = norm2
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F# - Objects + Functional type Vector2D(dx:double,dy:double) = let norm2 = dx*dx+dy*dy member v.DX = dx member v.DY = dy member v.Length = sqrt(norm2) member v.Norm2 = norm2

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F# - Objects + Functional type HuffmanEncoding(freq:seq<char*int>) = ... < 50 lines of beautiful functional code> ... member x.Encode(input: seq<char>) = encode(input) member x.Decode(input: seq<char>) = decode(input)
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F# - Objects + Functional type HuffmanEncoding(freq:seq<char*int>) = ... < 50 lines of beautiful functional code> ... member x.Encode(input: seq<char>) = encode(input) member x.Decode(input: seq<char>) = decode(input)

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F# - Objects + Functional type Vector2D(dx:double,dy:double) = let mutable currDX = dx let mutable currDX = dy member v.DX = currDX member v.DY = currDY member v.Move(x,y) = currDX <- currDX+x currDY <- currDY+y
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F# - Objects + Functional type Vector2D(dx:double,dy:double) = let mutable currDX = dx let mutable currDX = dy member v.DX = currDX member v.DY = currDY member v.Move(x,y) = currDX <- currDX+x currDY <- currDY+y

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F# Async/Parallel
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F# Async/Parallel

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The Solution Good Architecture Know your techniques Know your requirements Know your limits (CPU, disk, network, latency) Translate Good Architecture into Good Code with F# A great platform A massive increase in isolation and immutability A massive reduction in mutation
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The Solution Good Architecture Know your techniques Know your requirements Know your limits (CPU, disk, network, latency) Translate Good Architecture into Good Code with F# A great platform A massive increase in isolation and immutability A massive reduction in mutation

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Async: Simple Examples
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Async: Simple Examples

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DEMO
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DEMO

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8 Ways to Learn FSI.exe Samples Included Go to definition Lutz’ Reflector
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8 Ways to Learn FSI.exe Samples Included Go to definition Lutz’ Reflector

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Books about F#
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Books about F#

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Getting F# September 2008: CTP released F# will be a supported language in Visual Studio 2010 Next stop: Visual Studio 2010 Beta 1 Look for it soon!
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Getting F# September 2008: CTP released F# will be a supported language in Visual Studio 2010 Next stop: Visual Studio 2010 Beta 1 Look for it soon!

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Questions & Discussion
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Questions & Discussion

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F# Succinct, Expressive, Functional, слайд №45
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