Compare two arrays

JavaScript version

// `a` and `b` are arrays
const isEqual = (a, b) => JSON.stringify(a) === JSON.stringify(b);

// Or
const isEqual = (a, b) => a.length === b.length && a.every((v, i) => v === b[i]);

TypeScript version

const isEqual = <T,_>(a: T[], b: T[]): boolean => JSON.stringify(a) === JSON.stringify(b);

// Or
const isEqual = <T,_>(a: T[], b: T[]): boolean => a.length === b.length && a.every((v, i) => v === b[i]);

Examples

isEqual([1, 2, 3], [1, 2, 3]); // true
isEqual([1, 2, 3], [1, '2', 3]); // false