Implement task 2 from block 3 (castles) of homework located at https://hackmd.io/@mtb49Ag9TOmTeG0qf_6Fwg/BkcpMch44
Implement Ord instance for newtype below.
It should follow the described semantics:
- If both strings being compared start from a digit symbol (
0..9), read numeric prefixes and compare strings by these prefixes. If both strings start from the same number (e.g.01abaand1caba), comparison is performed by rest of string characters case-insensitive - Otherwise, compare two strings case-insensitive
When launched from ghci, following results will be printed.
Explain the difference in calls (why one call returns while other goes into infinite loop):
> sumAndLogD [8] (BoxD 2)
Just 3.0
> sumAndLog [8] (Box 2)
Just 3.0
> sumAndLog [8 -10] loop
Nothing
> sumAndLogD [8 -10] loop
{.. infitinte loop ..}