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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 | 3x 1x 2x 1x 1x 1x 2x 1x 1x 1x 1x 1x 1x | /* */ "use strict"; // These won't be exported: const roundToCents = (x ) => Math.round(x * 100) / 100; const changeSign = (x ) => -x; // The following will be exported: const addR = (x , y ) => roundToCents(x + y); const subR = (x , y ) => addR(x, changeSign(y)); const multR = (x , y ) => roundToCents(x * y); const divR = (x , y ) => { if (y === 0) { throw new Error("Divisor must be nonzero"); } else { return roundToCents(x / y); } }; /* NOTES: 1. Exports are all together, at the end, per convention 2. roundToCents and changeSign are not exported, on purpose */ exports.addR = addR; exports.subR = subR; exports.multR = multR; exports.divR = divR; |