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Scala Programming Projects
book

Scala Programming Projects

by Mikael Valot, Nicolas Jorand
September 2018
Intermediate to advanced
398 pages
9h 43m
English
Packt Publishing
Content preview from Scala Programming Projects

Implementing futureCapital

We now have a failing test, so it is time to make it pass by writing the production code. If we use initialCapital = 10,000 and monthlySavings = 1,000, the computation we need to perform can be decomposed as follows:

  • For month 0, before any savings, we have capital0 = initialCapital = 10,000.
  • For month 1, our initial capital generated some interest. We also saved 1,000 more. We therefore have capital1 = capital0 *(1 + monthlyInterestRate) + 1,000
  • For month 2, we have capital2 = capital1 *(1 + monthlyInterestRate) + 1,000

There is a mathematical formula to compute capitalN from the parameters, but we will not use it here. This formula works well for fixed interest rates, but we will use variable interest rates ...

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Publisher Resources

ISBN: 9781788397643