8ee50178f3
Correct: `Array.from()` (it’s a static method) Incorrect: `Array.join()` (doesn’t exist; it’s a prototype method) This patch uses the common `#` syntax to denote `.prototype.`.
15 lines
353 B
Markdown
15 lines
353 B
Markdown
### average
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Returns the average of two or more numbers.
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Use `Array.prototype.reduce()` to add each value to an accumulator, initialized with a value of `0`, divide by the `length` of the array.
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```js
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const average = (...nums) => nums.reduce((acc, val) => acc + val, 0) / nums.length;
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```
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```js
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average(...[1, 2, 3]); // 2
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average(1, 2, 3); // 2
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```
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