Does J (all versions, maybe stripped-down) maintain a dependable noun
in _z_ or _j_ giving the file path separator, viz '/' or '\' ?
Or should I always simply use? --
IFWIN{'/\'
Does anyone know of a J-supported platform that uses anything other
than '/' or '\' ? (The Mac used to use ':' but now accepts Unix's '/'
pretty well everywhere.)
And does IFWINCE imply IFWIN?
I'm using tricks all over the place that empirically work -- but
what's the set-in-stone convention for a widely-distributed utility?
Here's the technique I propose to standardize on, for any utility
script which needs to know where it resides:
MYPATH=: 3 : 0 ''
NB. returns directory containing this script
NB. also assigns two globals:
NB. WHEREAMI -the folder in question
NB. SEP -the platform-dependent separator
ws=. [: 'Not from script'"_`({ 4!:3@(0&$))@.(0&<:) [: 4!:4 [: < >
WHEREAMI=: '<UNSET>' NB. needed for ws to work with
z=. >ws 'WHEREAMI'
SEP=: '/\' {~ '\' e. z NB. '\' present--> MSWin path conventions
WHEREAMI=: (>: z i: SEP) {.z
)
Any comments on its generality, style, redundancy, potential to break, etc?
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