swap the first and last items in an array of length n
function swap(arr: number[], n): number[] { let temp = arr[0]; arr[0] = arr[n-1]; arr[n-1] = temp; return arr; } swap([1, 2, 3, 4, 5], 5);
swap the first and last items in an array of length n
function swap(arr: number[], n): number[] { let temp = arr[0]; arr[0] = arr[n-1]; arr[n-1] = temp; return arr; } swap([1, 2, 3, 4, 5], 5);
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