Congratulations, you made it to the end of the course! The crew’s dock report now runs in JavaScript. Before each shift, dock-report.js goes through the five docks, skips Market Hall while it’s closed for repairs, flags Elm Street as empty and Harbor Square and Riverside Park as nearly full, and tells the van to start with 6 bikes. It’s the first whole program you’ve written in JavaScript.
In this course, you learned how to:
- Declare each name with
constby default, and withletonly for a name you’ll reassign, such asdocksChecked - Build strings with template literals, putting any expression in a
${...}hole - Make decisions with
if,else if, andelse, comparing with===and combining with&&,||, and! - Loop over an array’s items with
for...of - Write functions as declarations with an explicit
return, and small ones as arrows - Use arrays as lists and objects as dicts and records, including an array of objects for the docks
Keep the Habits That Carry Over
Most of what you do in Python still works here. You read the dock list, decide what each dock needs, keep a running total, and print a line per dock, in the same order and with the same logic. A template literal does an f-string’s job, and a function still takes values and hands one back. for...of walks a list the way Python’s for does, while for...in, the spelling that looks closer to Python, walks the indices.
