Functional programming f#

Functional programming f#

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  Functional Programming - Introducing F# 06/15/2012
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  Example  Give mea list of numbers from 1 to 100. Tell me how ? Tell me what ?
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  What? Functional programming isa programming paradigm that treats computation as the evaluation of mathematical functions and avoids state and mutable data. y = f (x) A function is a transformation. It transforms one or more inputs into exactly one output.
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  Why?  Succinct &simpler programs  Small code base, low dev/maintenance cost.  A number of powerful new ways to structure and reason about programs.  Immutability  High order function  Pattern Matching …
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  How?  Immutability  TypeInference  Recursion  High Order Functions  Partial Application  Pattern Matching  Unit of Measure
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  Immutability By default, valuesare immutable. Use keyword mutable to mark it as mutable.
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  Type Inference  F#can deduce data types automatically.  Type annotation is necessary in certain case.
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  Recursion • Functional programmingprefers recursion to imperative for-each loops. • Prefer tail recursion to avoid stack overflow
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  High order Function Functions in F#
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  High order Function Functions as First Class Member  Functions that accept a function as a parameter or returns a function
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  High Order Function Map  Fold  Zip  Filter  Pipeline  Function Composition  Partial Application
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  Pattern Match  Comparedata with a logical structure  Decompose data into its constituent parts  Extract information from constructs in various ways
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  Unit of Measure Floating point and signed integer values in F# can have associated units of measure.  Compile time checking.
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  Functional Programming inReal World  Erlang developed in Ericsson widely used in T- Mobile, Facebook....  Industry  Communication  Finance industry  Scientific computation  AI  Languages support FP  Haskell  Scala  Python  Clojure  …
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  Resources  The F#Survival Guide  Functional Programming for the Real World