zip
-- combine listszip
(list1, list2, f)
combines two lists
via a function f
. It returns a list whose i-th
entry is f(list1[i], list2[i])
. Its length is the minimum
of the lengths of the two input lists.
zip
(list1, list2, f, default)
returns a
list whose length is the maximum of the lengths of the two input lists.
The shorter list is padded with the default
value.
zip(list1, list2, f)
zip(list1, list2, f, default)
list1, list2 |
- | lists of arbitrary MuPAD objects |
f |
- | any MuPAD object. Typically, a function of two arguments. |
default |
- | any MuPAD object |
a list.
list1
, list2
f
produces the void object of type DOM_NULL
, then this element is
removed from the resulting list.zip
is recommended for fast manipulation of lists. It
is a function of the system kernel.The fastest way of adding the entries of two lists is to
'zip' them via the function _plus
:
>> zip([a, b, c, d], [1, 2, 3, 4], _plus)
[a + 1, b + 2, c + 3, d + 4]
If the input lists have different lengths, then the shorter list determines the length of the returned list:
>> zip([a, b, c, d], [1, 2], _plus)
[a + 1, b + 2]
The longer list determines the length of the returned list if a value for padding the shorter list is provided:
>> zip([a, b, c, d], [1, 2], _plus, 17)
[a + 1, b + 2, c + 17, d + 17]