Re: Multi-assign
- Posted by Fernando Nov 19, 2011
- 2208 views
DerekParnell said...
Fernando said...
Some interesting possibilities with LHS symbolic sequences:
- Initializing several variables with the same value:
{a,b,c} = 0
When the RHS is an atom, we might be able to get away with this, but once the RHS is a sequence, we strike ambiguities.
Consider ...
{a,b,c} = 1 -- Assign 1 to a, b, and c {a,b,c} = {d,e,f} -- Assign {d,e,f} to a, b, and c or -- assign d to a, e to b, and f to c?
IMHO, one of the intentions of multi-assign is to simplify the access to the elements of a returned sequence of a function. Then:
{a,b,c} = {d,e,f} -- assign d to a, e to b, and f to c
To satisfy the other case:
{a,b,c} = { {d,e,f} , {d,e,f} , {d,e,f} }
- Fernando
