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let x = 1, y = 2; [x, y] = [y, x]; // x=2, y=1 // Multi-swap let a = 1, b = 2, c = 3; [a, b, c] = [b, c, a]; // rotate: a=2, b=3, c=1 // Practical: rotate array elements const arr = [1, 2, 3, 4]; [arr[0], arr[arr.length - 1]] = [arr[arr.length - 1], arr[0]]; // swap first and last
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