- Use Array.prototype.filter() and Array.prototype.findIndex() to find the appropriate values.
- Omit the last argument, comp, to use a default strict equality comparator.
//#Source https://bit.ly/2neWfJ2 const differenceWith = (arr, val, comp) => arr.filter(a => val.findIndex(b => comp(a, b)) === -1); console.log(differenceWith([1, 1.2, 1.5, 3, 0], [1.9, 3, 0], (a, b) => Math.round(a) === Math.round(b)));
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Returns an array of n-tuples of consecutive elements
const tips_arr = (n, arr) => n > arr.length ?  : arr.slice(n - 1).map((v, i) =>[...arr.slice(i, i + n - 1), v]); console.log(tips_arr(2, [1, 2, 3, 4, 5])); console.log(tips_arr(3, [1, 2, 3, 4, 5])); console.log(tips_arr(5, [1, 2, 3, 4]));
[[1, 2], [2, 3], [3, 4], [4, 5]] [[1, 2, 3], [2, 3, 4], [3, 4, 5]] 
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