I have found that it is possible to assign variables from lists, as follows.
r = {1, 2, 3};
{a, b, c} = r;
b
2
However, if I try to do this within a With or Module statement, it does not evaluate:
With[{{x, y, z} = r}, x]
Module[{{x, y, z} = r}, x]
With[{{x, y, z} = r}, x] Module[{{x, y, z} = r}, x]
whereas I expected it to work as:
With[{x = r[[1]], y = r[[2]], z = r[[3]]}, y]
Module[{x = r[[1]], y = r[[2]], z = r[[3]]}, y]
2 2
or even:
Module[{x, y, z}, {x, y, z} = r; y]
2
Why is this? Is there an accepted way to do this?
