test2.md

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author: 'Luca Guadagnini' title: 'Two face - OOP vs. FP' patat: theme: title: [vividGreen] header: [vividWhite,bold] emph: [vividGreen] code: [dullBlack,onDullWhite] codeBlock: [dullBlack,onDullWhite] ...

#How many times do we need to flip the coin?

• What are you talking about?
• No matter what you must be SOLID
• Design patterns

#What are you talking about?

import java.util.function.UnaryOperator;

import static java.lang.System.out;
import static java.util.stream.Collectors.toList;
import static java.util.stream.Stream.iterate;

public interface Main {
  static void main(String... args) {
    final int[] identity = {0, 1};
    final UnaryOperator<int[]> next = array -> new int[]{array[1], array[0] + array[1]};

    out.println(
      iterate(identity, next)
        .limit(10)
        .map(it -> it[0])
        .collect(toList())
    );
  }
}

#No matter what you must be SOLID

##Vending coffee machine kata

• As vendor I want to add the coffee product
• As vendor I want to add an ingredient