Contents
filterfilterfalse
compress- Recursively
- With
zipandcatMaybes - With
zipandmapMaybe - With
zip,map, andfilter
In contrast with takewhile which stops the first time it encounters a non-matching value, filter continues past non-matching values and produces a list containing all of the values that satisfy the predicate.
filter
Here we use filterfilter in Python to select, from among the natural numbers, only those that are even:
>>> it = filter(lambda x: x % 2 == 0, count(1))
>>> list(islice(it, 10))
[2, 4, 6, 8, 10, 12, 14, 16, 18, 20]