malta
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Lightning builder allows to compose on the fly and update packed and full coded huge files, edit its parts as files, splitted and glued as You need.
36 lines (31 loc) • 1.11 kB
JavaScript
class Mortgage {
constructor(principal, years, rate) {
this.principal = principal;
this.years = years;
this.rate = rate;
}
get monthlyPayment() {
let monthlyRate = this.rate / 100 / 12;
return this.principal * monthlyRate / (1 - (Math.pow(1/(1 + monthlyRate),
this.years * 12)));
}
get amortization() {
let monthlyPayment = this.monthlyPayment;
let monthlyRate = this.rate / 100 / 12;
let balance = this.principal;
let amortization = [];
for (let y=0; y<this.years; y++) {
let interestY = 0;
let principalY = 0;
for (let m=0; m<12; m++) {
let interestM = balance * monthlyRate;
let principalM = monthlyPayment - interestM;
interestY = interestY + interestM;
principalY = principalY + principalM;
balance = balance - principalM;
}
amortization.push({principalY, interestY, balance});
}
return amortization;
}
}