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Merge pull request #40 from elderhsouza/patch-1

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minor refactor to the fibonacci array generator
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Angelos Chalaris
2017-12-12 19:21:10 +02:00
committed by GitHub
parent 6c5d894205 a69bd30660
commit 7eff1fa27c
1 changed files with 3 additions and 7 deletions
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10
snippets/fibonacci-array-generator.md
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@ -1,14 +1,10 @@
### Fibonacci array generator
Create an empty array of the specific length, initializing the first two values (`0` and `1`).
Use `reduce()` to add values into the array, using the sum of the last two values, except for the first two.
Use `Array.reduce()` to add values into the array, using the sum of the last two values, except for the first two.
```js
const fibonacci = n =>
Array.apply(null, [0,1].concat(Array(n-2))).reduce(
(acc, val, i) => {
acc.push( i>1 ? acc[i-1]+acc[i-2] : val);
return acc;
},[]);
const fibonacci = n =>
Array(n).fill(0).reduce((acc, val, i) => acc.concat(i > 1 ? acc[i - 1] + acc[i - 2] : i),[]);
// fibonacci(5) -> [0,1,1,2,3]
```