Enumerate possible format results

[linkviii]

I'm laying out some text with multiple dates and a format argument. I would like to know the maximum size of a formatted date. Calculating the size of all my formatted dates takes too much time for me. (After implementing this I realized I didn't really need it, but since I already did it, here it is)

_locale being private/not exported prevents implementing enumeration without modifying the library.

I forked the library and provided an exported enumerate function that was implemented basically by a copy paste of _processFormat. https://github.com/Linkviii/strftime

Excerpts of my demo-enum.js:

Enumerate %c: (Tue 07 Jun 2011 06:51:45 PM GMT) →
[
  [
    'Sun', 'Mon',
    'Tue', 'Wed',
    'Thu', 'Fri',
    'Sat'
  ],
  [ ' ' ],
  [ '08', '88' ],
  [ ' ' ],
  [
    'Jan', 'Feb', 'Mar',
    'Apr', 'May', 'Jun',
    'Jul', 'Aug', 'Sep',
    'Oct', 'Nov', 'Dec'
  ],
  [ ' ' ],
  [ '8888' ],
  [ ' ' ],
  [ '08', '88' ],
  [ ':' ],
  [ '08', '88' ],
  [ ':' ],
  [ '08', '88' ],
  [ ' ' ],
  [ 'AM', 'PM' ],
  [ ' ' ],
  [ 'GMT' ]
]

Max string length of '%A %B' 
costs 19 → 'Wednesday September'

---

I'm not sure this is a feature this library would be interested in supporting, but I thought I'd leave this issue here in case anyone is interested.