West Midlands | 25-ITP-Sep | Ali Naru | Sprint 1 | feature/destructuring #333
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…dor member and teacher retrieval functions
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MohammedNaru
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📅 Sprint 1
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| function getGryffindorMembers(arr) { | ||
| const gryffindorMembers = arr.filter(({ house }) => house === "Gryffindor").map(({ firstName, lastName }) => `${firstName} ${lastName}`).join('\n'); |
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A long statement that chains multiple methods/functions becomes more readable when written across multiple lines, placing each method/function on its own line. For example,
const gryffindorMembers = arr
.filter(({ house }) => house === "Gryffindor")
.map(({ firstName, lastName }) => `${firstName} ${lastName}`)
.join('\n');| const receiptLines = order.map(({itemName, quantity, unitPricePence}) => { | ||
| const itemTotalPounds = (quantity * (unitPricePence / 100)); | ||
| qtyWidth = Math.max(qtyWidth, String(quantity).length); | ||
| itemWidth = Math.max(itemWidth, itemName.length); | ||
| return { itemName, quantity, itemTotalPounds }; | ||
| }) | ||
| console.log('QTY'.padEnd(qtyWidth+4), 'ITEM'.padEnd(itemWidth+3), 'TOTAL'); | ||
| receiptLines.forEach(({itemName, quantity, itemTotalPounds}) => { | ||
| total += itemTotalPounds; | ||
| console.log(String(quantity).padEnd(qtyWidth+4), itemName.padEnd(itemWidth+3), `${itemTotalPounds.toFixed(2)}`); | ||
| }) |
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Here is an alternative approach to express the code:
// Calculate reserved width first
const qtyWidth = 4 + Math.max(3, ...order.map(({quantity}) => String(quantity).length));
const itemWidth = 3 + Math.max(4, ...order.map({itemName}) => itemName.length));
// Prepare a helper function to construct a formatted string
const formatStr = (qty, name, total) =>
`${qty.padEnd(qtyWidth)}${name.padEnd(itemWidth)}${total}`);
console.log(formatStr('QTY', 'ITEM', 'TOTAL');
let total = 0;
order.forEach(({itemName, quantity, unitPricePence}) => {
const subtotal = quantity * unitPricePence / 100;
total += subtotal;
console.log(formatStr(quantity, itemName, subtotal.toFixed(2)));
})
cjyuan
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Feature/destructuring Pull Request
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