const numbers = [1, 2, 3, 4, 5, 3, 1, 2] console.log(numbers.lastIndexOf(2)) // 7 console.log(numbers.lastIndexOf(0)) // -1 console.log(numbers.lastIndexOf(1)) // 6 console.log(numbers.lastIndexOf(4)) // 3 console.log(numbers.lastIndexOf(6)) // -1
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