JavaScript Mover el último elemento de matriz al primero
let arr1 = [1, 2, 3, 4, 5]
let arr2 = [1, 2, 3, 4 ,5]
// first to the last
arr1.push(arr1.shift()) // [2, 3, 4, 5, 1]
// last to the first
arr2.unshift(arr2.pop()) // [5, 1, 2, 3, 4]
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