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a playground for me (and maybe helpful for others?) to train the brain understand the decorator pattern better

• a basic function decorator, seeexample1
• a basic timing decorator (how long does func X take?), seeexample2
• decorating a method (think OOP), seeexample3
• another method decorator, but using a Func type, useful when the func signature is rather long, seeexample4
• method decorator that takes argumentsexample5
• return the result from the decorated function, instead of printing itexample6
• a logging decorator, seeexample7
• a nested decorator example, seeexample8
• passing data to a http handler is a little weird (to me), but a fully working example is here:go-web-random
• let's play with a interfaceexample9

pull requests are welcomed