| Type | Wish | Status | reviewed | Date | 4-Nov-2009 04:53 |
|---|---|---|---|---|---|
| Version | alpha 94 | Category | Datatype | Submitted by | abolka |
| Platform | All | Severity | minor | Priority | normal |
| Summary | MAP! should be case-sensitive for any-string! and char! keys |
|---|---|
| Description |
I can see the convenience of having case-insensitive comparison for WORD! keys, especially when using the m/key notation. But for almost every other series key, this behaviour is more often than not outright harmful. For STRING!s it's highly counter-intuitive; for FILE!s and URL!s it is simply wrong in many cases. Etc. I'd therefore suggest to get rid of all key-lowercasing for MAP!s. Or at least make case-sensitivity the default and special-case for the "REBOL-internal" datatypes (word!, refinement!, path!, ...). |
| Example code |
>> make map! ["foo" 1 "FOO" 2 %foo 1 %FOO 2] == make map! ["foo" 2 %foo 2] ;; EXPECTED: == make map! ["foo" 1 "FOO" 2 %foo 1 %FOO 2] |
| Assigned to | n/a | Fixed in | - | Last Update | 8-Jan-2013 06:26 |
|---|
| Comments | |
|---|---|
|
(0001778)
BrianH 14-Nov-2009 23:15 |
This sidesteps the knotty issue of Unicode case insensitivity, but it does conflict with the REBOL standard of case-insensitive by default, case sensitive where /case is specified. Arguably it is a loss of information (which is bad). But it is a bit of a stretch to say it would be unexpected since this kind of behavior is the default throughout REBOL.
Still, it could be a good idea to have STRICT-EQUAL? comparison of characters and string types in map! keys, and it might be more efficient. We'll need to see if this conflicts with the default case insensitivity of SELECT, the most commonly used method of accessing data in a map! - at least SELECT/case would work. Summary changed to show actual types affected. |
|
(0003350)
abolka 8-Jan-2013 06:26 |
Also see the related suggestion in #1774 of creating an additional, case-sensitive map type (tentatively called strict-map!). |
| Date | User | Field | Action | Change |
|---|---|---|---|---|
| 8-Jan-2013 06:26 | abolka | Comment : 0003350 | Modified | - |
| 8-Jan-2013 06:26 | abolka | Comment : 0003350 | Added | - |
| 14-Nov-2009 23:15 | BrianH | Comment : 0001778 | Added | - |
| 14-Nov-2009 23:04 | BrianH | Summary | Modified | MAP! should be case-sensitive for (almost?) all key datatypes => MAP! should be case-sensitive for any-string! and char! keys |
| 14-Nov-2009 23:04 | BrianH | Description | Modified | - |
| 14-Nov-2009 23:04 | BrianH | Code | Modified | - |
| 14-Nov-2009 23:04 | BrianH | Version | Modified | alpha 95 => alpha 94 |
| 14-Nov-2009 23:04 | BrianH | Status | Modified | submitted => reviewed |
| 14-Nov-2009 23:04 | BrianH | Type | Modified | Bug => Wish |
| 4-Nov-2009 04:53 | abolka | Ticket | Added | - |