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Kotlin for java refugees

Day 1

Challenge

In a list of numbers, we have to find the couple that sum to 2020 and multiply them.

1721
979
366
299
675
1456

Each line contains a number.

Our task is to check that the couple of numbers :

  • sum to 2020
  • display the result of the multiplication

For the second part, we have to sum up three numbers.

Part 1

Find the two numbers that sum up result to 2020, and display their multiplication. img.png

Part 2

Find three numbers that sum up to 2020, and display their multiplication. img.png

Exercise

  • How would you solve it ? - 10’
    • In group, write down the pseudo algorithm (in comments for example)
  • Collective debriefing - 10’
    • Let’s agree on how to implement it
    • What do we need to write it in Kotlin ?
  • Step by step + koans - 20’
  • Let’s implement the solution - 20’
  • Collective debriefing - 10’
    • What can be improved ?
  • Go back to the Step by step page on step 4 - 10’
    • Let’s refactor / improve our code
  • Debriefing - 5’
    • What was the most important concept you discovered today ?

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