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nash403/perfect-modulo.js

Created April 12, 2017 08:08
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Modulo that always returns a value always between 0 and `size - 1`
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perfect-modulo.js
/**
* Returns a value always between 0 and size - 1.
* @param a current index
* @param b size
*/
export function modulo(a, b) { return (+a % (b = +b) + b) % b; };
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