unfoldr package:jsaddle

O(n), where n is the length of the result. The unfoldr function is analogous to the List unfoldr. unfoldr builds a JSString from a seed value. The function takes the element and returns Nothing if it is done producing the JSString, otherwise Just (a,b). In this case, a is the next Char in the string, and b is the seed value for further production. Subject to fusion. Performs replacement on invalid scalar values.

O(n), where n is the length of the result. The unfoldr function is analogous to the List unfoldr. unfoldr builds a stream from a seed value. The function takes the element and returns Nothing if it is done producing the stream or returns Just (a,b), in which case, a is the next Char in the string, and b is the seed value for further production. Properties

unstream . unfoldr f z = unfoldr f z

O(n) Like unfoldr, unfoldrN builds a JSString from a seed value. However, the length of the result should be limited by the first argument to unfoldrN. This function is more efficient than unfoldr when the maximum length of the result is known and correct, otherwise its performance is similar to unfoldr. Subject to fusion. Performs replacement on invalid scalar values.

O(n) Like unfoldr, unfoldrN builds a stream from a seed value. However, the length of the result is limited by the first argument to unfoldrN. This function is more efficient than unfoldr when the length of the result is known.

O(n) Like unfoldr, unfoldrNI builds a stream from a seed value. However, the length of the result is limited by the first argument to unfoldrNI. This function is more efficient than unfoldr when the length of the result is known. Properties

unstream (unfoldrNI n f z) = unfoldrN n f z