14 lines
258 B
Markdown
14 lines
258 B
Markdown
### arraySum
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Returns the sum of an array of numbers.
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Use `Array.reduce()` to add each value to an accumulator, initialized with a value of `0`.
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```js
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const arraySum = arr => arr.reduce((acc, val) => acc + val, 0);
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```
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```js
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arraySum([1,2,3,4]) -> 10
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```
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