Comments (3)
Thinking about it, cartesian method implementation is already lazy. This method allows a finite number of iterables. These iterables can be potentially infinite. When I thought in lazy cartesian method, I thought in a product of infinite iterables. However this thing is impossible to implement because we need to know if all of iterables are empty or not to check if the iterable result is empty or not.
Then, I just have to implement cartesian method that returns an Iterum instance of Iterum instances.
from iterum.
However, the current implementation of cartesian returns values in this order:
Iterum([1, 2]).cartesian([3, 4]) /* (
(1 3)
(1 4)
(2 3)
(2 4)
) */
For consistency, I prefer:
Iterum([1, 2]).cartesian([3, 4]) /* (
(1 3)
(2 3)
(1 4)
(2 4)
) */
Because there are other methods like permutations
, power
, combinations
, variations
that could be work with infinite iterables and numbers if the first value of iterables is that variates first.
from iterum.
I also going to change cartesian
method name to product
.
from iterum.
Related Issues (20)
- implement `power` method
- implement `combinations` method HOT 1
- Removing optional arguments in methods. HOT 4
- removing forEach method
- removing `fromIndex` arguments. HOT 2
- Implement `has` & `nth` methods
- Add benchmarks HOT 4
- permutations method must work with infinite iterables
- remove default behaviour of Iterum functions if first parameter is not an iterable.
- adapt functions to functional style (iterable last) HOT 3
- currying functions
- add powerset method and function
- add variations (k-permutations) method and function
- implement zipLongest & transposeLongest
- implement `tap`
- implement chunk
- implement toString
- Implement cycle
- adapt indexOf to use sameValueZero specification for equality
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from iterum.