simplifyFraction

Author: masx200

deep-dark-fraction/index.ts

@@ -16,7 +16,6 @@ export default function fraction(cont: number[]): number[] {
                         result,
                     ),
                 ],
-                false,
             );
         }
 

fraction-addition-and-subtraction/index.ts

@@ -3,24 +3,33 @@ import { deduplication } from "./deduplication.ts";
 import { Fraction } from "./Fraction.ts";
 import { parseFraction } from "./parseFraction.ts";
 import { FractionToString } from "./Fraction.ts";
-export function fractionAdd(fractions: Fraction[], simplify = true): Fraction {
+export function fractionAdd(fractions: Fraction[]): Fraction {
     const denominator = deduplication(
         fractions.map((f) => f.denominator),
     ).reduce((a, b) => a * b);
     const molecular = fractions
         .map((f) => (f.sign * f.molecular * denominator) / f.denominator)
         .reduce((a, b) => a + b);
-    const gcd = simplify ? greatestCommonDivisor(molecular, denominator) : 1;
+
+    return new Fraction({
+        denominator: denominator,
+        molecular: molecular,
+    });
+}
+export function simplifyFraction(fraction: Fraction) {
+    const { molecular, denominator } = fraction;
+    const gcd = greatestCommonDivisor(molecular, denominator);
     return new Fraction({
-        denominator: denominator / gcd,
-        molecular: molecular / gcd,
+        sign: fraction.sign,
+        denominator: fraction.denominator / gcd,
+        molecular: fraction.molecular / gcd,
     });
 }
 function fractionAddition(expression: string): string {
     const fractions = parseFraction(expression);
 
     return FractionToString(
-        fractionAdd(fractions),
+        simplifyFraction(fractionAdd(fractions)),
     );
 }
 export default fractionAddition;