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- const greaterThan5000 = { endOfRange: Money('$5000.00'), interestPerDollar: Money('$0.14'), previousInterestPerDollar: Money('$0.09') };
- const greaterThan10000 = { endOfRange: Money('$10000.00'), interestPerDollar: Money('$0.21'), previousInterestPerDollar: Money('$0.14') };
- + // You can move this into a configuration file so that changes
- + // in the behavior doesn't require code changes
- + const ranges = [greaterThan2000, greaterThan5000, greaterThan10000];
- +
- let interestAmount = Money('$0.00');
- - if (loanAmount.greaterThan(Money('$2000.00'))) {
- - interestAmount = interestAmount.plus(calculateInterest(loanAmount, greaterThan2000));
- + if (loanAmount.greaterThan(ranges[0].endOfRange)) {
- + interestAmount = interestAmount.plus(calculateInterest(loanAmount, ranges[0]));
- }
- - if (loanAmount.greaterThan(Money('$5000.00'))) {
- - interestAmount = interestAmount.plus(calculateInterest(loanAmount, greaterThan5000));
- + if (loanAmount.greaterThan(ranges[1].endOfRange)) {
- + interestAmount = interestAmount.plus(calculateInterest(loanAmount, ranges[1]));
- }
- - if (loanAmount.greaterThan(Money('$10000.00'))) {
- - interestAmount = interestAmount.plus(calculateInterest(loanAmount, greaterThan10000));
- + if (loanAmount.greaterThan(ranges[2].endOfRange)) {
- + interestAmount = interestAmount.plus(calculateInterest(loanAmount, ranges[2]));
- }
- return interestAmount;
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