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lect7 - Yin Lou CS 2026 Spring 2010 Assignment 2 is...

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Yin Lou CS 2026, Spring 2010
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Assignment 2 is released Due this Friday Implement Set<T> and SortedSet<T> OO features Generics Delegates Enumerator Operator Overload
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Delegates Anonymous methods Events
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Reflection Conversion Explicit and implicit conversions User-defined conversions Exceptions
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The ability to refer to the type system at run- time Type t = Type.GetType (“System.Int32”); bool b = t.IsSubClassOf(typeof(object)); Construct types from strings Have classes that represent type Can explicitly compare types and determine subclassing (and other) relationships
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We want to get methods dynamically Type contains about the type All methods, members, properties ..etc Whether or not it is an array All nested types Check out System.Reflection C c = new C(); Type t = c.GetType(); for (int i=0; i<10; i++) { MethodInfo m = t.GetMethod (“m”+ i); m.Invoke(c, null); }
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System.Reflection.Emit namespace Can dynamically generate CIL code e.g. System.Reflection.Emit.FooMethod Allows the replacement of a body with another
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How do we get/check type information? use is operator: if (c is C) { … } like instanceof in Java returns true if it is this class If it is a subclass, is returns true
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