hi,
still learning j... been looking at rosetta code which is handy. the
example of changing case here:
http://rosettacode.org/rosettacode/w/index.php?title=Change_string_case#J
and reproduced here:
upper=: (a.,~a.{~65+i.26) {~ (a.,~a.{~97+i.26) i. ]
lower=: (a.,~a.{~97+i.26) {~ (a.,~a.{~65+i.26) i. ]
seems a little unwieldy... are there better ways?
i don't know if this is any 'better':
A2Z=.(a.i.'A')+i.26
a2z=.(a.i.'a')+i.26
lower=.((a2z{a.) A2Z }a.) {~ a.i.]
upper=.((A2Z{a.) a2z }a.) {~ a.i.]
upper '123abcDEF'
123ABCDEF
lower '123abcDEF'
123abcdef
how could i define a word 'cmap' so that
lower2=.cmap A2Z a2z
upper2=.cmap a2z A2Z
?
ta, jack
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