Open sisterAn opened 3 years ago
let x = [1, 2, 3]; let y = x; let z = [4, 5, 6]; y[0] = 10; y = z; z[1] = 20; x[2] = z = 30; console.log(x, y, z);
[10,2,30] [4,20,6] 30
x-->[1,2,3] y=x 即 y-->[1,2,3] z-->[4,5,6] y[0]=10 即[10,2,3] y-->[4,5,6] z[1] = 20 [4,20,6] z=30 x[2]=z [10,2,30]