Your port of quote() now takes its options by name, and Bauer Legal’s rush job comes out at €1,116.00 in two working days, as it does in Python. The next request is Café Linde’s 180-word menu. The café didn’t tick a single box on the form, so the call is quote(180), with no options at all.
Python handles that without a second thought, because every optional parameter has a default. Your JavaScript port can’t take that call yet, because its pattern expects an object and there isn’t one. In this lesson, you’ll make the whole options object optional, pass options on without repeating their names, and decide which parameters belong in the object at all.
Leave the Options Out
The translator’s Python function gives every optional parameter a default, so a call with only the word count is complete:
def quote(words, rate=0.12, rush=False, minimum=40):
fee = max(words * rate, minimum)
days = 2 + words // 2000
if rush:
return fee * 1.5, max(1, days // 2)
return fee, days
print(quote(180))
Python prints (40, 2), the minimum fee and the shortest normal turnaround. In the JavaScript port, the destructuring pattern from the last lesson gets one more default, = {}, after its closing brace:
function quote(
words,
{ rate = 0.12, rush = false, minimum = 40 } = {},
) {
const fee = Math.max(words * rate, minimum);
const days = 2 + Math.floor(words / 2000);
if (rush) {
return [fee * 1.5, Math.max(1, Math.floor(days / 2))];
}
return [fee, days];
}
console.log(quote(180));
console.log(quote(6200, { rush: true }));
Run it, and the café gets its €40 minimum while Bauer Legal keeps its rush price:
