Congratulations, you made it to the end of the course! The translator’s quote rules now run in JavaScript and price each quote with whatever options a client ticked. quote-lines.js prints the same three lines as her Python script: Bauer Legal’s €1,116.00 rush job, Café Linde’s €40.00 minimum, and Nordwind GmbH’s 1128.00 for the sheet.
In this course, you learned how to:
- Return early from a function and read
undefinedas “not passed, not returned, or not there” - Return several results as an array,
[fee, days], to destructure, or as an object when they need names - Write the default you mean in the parameter list, such as
notes = [] - Name small functions as arrows in a
const, knowing that a braced body needs areturn, and a returned object needs parentheses:() => ({ total: 0 }) - Pass functions such as
forEmailaround and wrap a method call in an arrow - Take named options in one object, destructured with defaults and made optional with
= {}, keeping one or two required values by position
Keep the Habits That Carry Over
Much of your Python thinking still holds: return and early returns, defaults after an = in the parameter list, and functions as values you can store and pass, as handing forSheet to the Nordwind line showed.
