如何在 JavaScript 中编写清晰有效的代码注释并提供更好的注释

javascript
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// ? increment by 2 to loop through only odd numbers
for (let i = 1; i < 10; i += 2) {
  console.log(i);
}

javascript
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//! custom sort function to prioritize items with the highest scores, then alphabetically by name
items.sort((a, b) => {
  if (a.score === b.score) return a.name.localecompare(b.name);
  return b.score - a.score;
});

javascript
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// ? calculates the total price of items in the cart
// todo: add handling for discount codes in future iterations
/**
 * calculates the total price of items in the cart.
 * @param {array} items - array of item objects with price and quantity.
 * @returns {number} - the total price.
 */
function calculatetotal(items) {
  return items.reduce((total, item) => total + item.price * item.quantity, 0);
}

javascript
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// ? generates a unique identifier string
function generateid() {
  return math.random().tostring(36).substr(2, 9);
}

javascript
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//! known issue: this method does not support nested objects; update expected in v2.0
function shallowclone(obj) {
  return { ...obj };
}

javascript
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// ? Handle null values as valid input to indicate 'unknown' data in our system
function processData(input) {
  if (input === null) return 'unknown';
  return input;
}