Lightning talk presentation for June 2010 ALT.NET

1. C# 4.0
dynamic
or:
How I Learned to Stop Worrying and
Love dynamic

3. “C# is still a statically typed language everywhere that
you are not using dynamic” – John Skeet
"Oh, well it's statically-typed as a dynamic type.“ – Scott
Hanselman blog
“C# is evolving nicely by introducing dynamic typing
through a static type called dynamic” – Nikhil Kothari

5. Office Interop
object oDocCustomProps = doc.CustomDocumentProperties;
Type typeDocCustomProps = oDocCustomProps.GetType();
typeDocCustomProps.InvokeMember(
"Item",
BindingFlags.Default |
BindingFlags.SetProperty,
null, oDocCustomProps,
new object[] {propertyName, propertyValue});
VS
aDoc.CustomDocumentProperties["CustomProperty1"] = "Alt.NET";

6. Calling Iron* from C#
ScriptEngine engine = Ruby.CreateEngine();
ScriptScope scope = engine.CreateScope();
engine.ExecuteFile("tax.rb", scope);
var CalculateTax =
scope.GetVariable<Func<TaxableItem[], decimal>>("calculate_tax");
var items = new TaxableItem[] {
new TaxableItem("Cola", 2.5),
new TaxableItem("Donut",1.5)
};
var tax = CalculateTax(items);
Console.WriteLine("Tax: {0}", tax);
Console.ReadLine();

7. Calling Iron* from C#
class Item def calculate_tax(items)
def initialize(name, price) total = 0.0
@name = name
@price = price items.each do |item|
end total += item.price * 0.1
end
def name
@name return total
end end
def price
@price
end
end