Clean up examples

Author: jessealama

examples/mortgage.js

@@ -5,20 +5,17 @@ const one = new Decimal128("1");
 const paymentsPerYear = new Decimal128("12");
 
 function calculateMonthlyPayment(p, r, y) {
-    let principal = new Decimal128(p);
-    let annualInterestRate = new Decimal128(r);
-    let years = new Decimal128(y);
+    const principal = new Decimal128(p);
+    const annualInterestRate = new Decimal128(r);
+    const years = new Decimal128(y);
     const monthlyInterestRate = annualInterestRate.divide(paymentsPerYear);
     const paymentCount = paymentsPerYear.multiply(years);
     const onePlusInterestRate = monthlyInterestRate.add(one);
     const ratePower = pow(onePlusInterestRate, paymentCount);
 
-    let x = principal.multiply(monthlyInterestRate);
-    let numerator = x.multiply(ratePower);
+    const x = principal.multiply(monthlyInterestRate);
 
-    let denominator = ratePower.subtract(one);
-
-    return numerator.divide(denominator);
+    return x.multiply(ratePower).divide(ratePower.subtract(one));
 }
 
 console.log(calculateMonthlyPayment("5000000", "0.05", "30").toString());

examples/step.js

@@ -11,4 +11,4 @@ function stepUp(d, n, x) {
 
 let starting = new Decimal128("1.23");
 let stepped = stepUp(starting, new Decimal128("3"), new Decimal128("-4"));
-console.log(stepped.toString({ numDecimalDigits: 4 })); // 1.2305
+console.log(stepped.toString({ numFractionalDigits: 4 })); // 1.2305