14 lines
330 B
Markdown
14 lines
330 B
Markdown
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### gcdOfArray
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It finds the GCD of all the numbers in an array by using `Array.reduce()` and the fact that `gcd(a,b,c) = gcd(gcd(a,b),c)`
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```js
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const gcdOfArray = arr =>{
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const gcd = (x, y) => !y ? x : gcd(y, x % y);
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return arr.reduce((a,b) => gcd(a,b))
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}
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// gcdOfArray([1,2,3,4,5]) -> 1
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// gcdOfArray([4,8,12]) -> 4
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```
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