Tips and Tricks To Improve Code Readability in C#

Transcript

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   P2P Code Academy Becoming a C# Warrior-Poet or Tips and

   Tricks To Improve Code Readability in C# 4 30th March
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   C#

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   Outline • Object Initializers • Named Arguments • Extension Methods

   • LINQ
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   Ye Olde Classic Constructor

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   Object Initializers vs Constructors

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   Object Initializers Uses Default Constructor!

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   Object Initializers. Benefits • Improved Readability • Less boiler-plate code

   – Don’t even need a constructor!
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   DEMO OBJECT INITIALIZERS

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   Collection Initializers

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    Named Arguments • Explicitly name method arguments

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    Named Arguments. Benefits What the heck is true?

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    Named Arguments. Benefits

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    Extension Methods Add methods to existing types: • No need

    to create derived type • No need to re-compile existing type • No need to modify original type • Just static methods in disguise!
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    Extension Methods. Syntax Special use of keyword this Look like

    instance methods!
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    Extension Methods Add a method to a primitive type Adding

    this method to the string class
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    Extension Methods Add a method to a primitive type Before

    After
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    DEMO EXTENSION METHODS

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    Extension Methods Add a method to a compiled custom type

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    LINQ Query language within C# and VB.NET • Very Expressive

    • Extensible • Integrated – LINQ to Objects – LINQ to SQL – LINQ to XML – LINQ to Entities
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    LINQ. Example Filtering a collection (People older than 30)

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    LINQ. Example Query Syntax Method Chain Syntax

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    DEMO LINQ

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    Summary • Object Initializers • Named Arguments • Extension Methods

    • LINQ
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    If you put it all together... Sonnet 138. The Passionate

    Pilgrim C# version while (myLove.Swears(that: ”She is made of truth”)) { do I.Believe(her); while (she.Lies()) she.Might(s => s.Think(I == ”some untutored youth”)); she.Might(s => s.Think(I == ”unskillful”)); ... }
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    C#

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    If you want to know more…

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    References • Object and Collection Initializers http://bit.ly/csharp-object-collection-initializer • Named Arguments

    http://bit.ly/csharp-named-arguments • Extension Methods http://bit.ly/csharp-extension-methods • LINQ http://bit.ly/linq-language-integrated-query
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    Thank you