javascript difference between two arrays
let difference = arr1.filter(x => !arr2.includes(x));
javascript difference between two arrays
let difference = arr1.filter(x => !arr2.includes(x));
js compare values of two arrays
const a = ['Left', 'Right'];
const b = ['Right', 'Left'];
// true if a and b contain the same values
// false otherwise
const c = a.sort().join(',') === b.sort().join(',');
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