Return every nth element in an array

Use Array.prototype.filter() to create a new array that contains every nth element of a given array.

const everyNth = (arr, nth) => arr.filter((e, i) => i % nth === nth - 1);

// EXAMPLE
everyNth([1, 2, 3, 4, 5, 6], 2); // [ 2, 4, 6 ]

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