Proposal: Make digitToInt and intToDigit work up to base 36
Christian.Maeder at dfki.de
Tue Jul 3 11:21:24 CEST 2012
Am 02.07.2012 19:17, schrieb Bryan O'Sullivan:
> It already surprised me that digitToInt accepted hex digits;
This indicates that digitToInt is broken anyway (or should be named
For the decimal case you would need to use "isDigit" anyway and then
could use just "ord c - ord '0'" instead of "digitToInt".
So a (more) total implementation of intToDigit could avoid some tests
leaving it to the programmer to decide between speed and safety.
| c <= '9' = ord c - ord '0'
| c >= 'a' = ord c - ord 'a' + 10
| otherwise = ord c - ord 'A' + 10
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