"Jim Lewis" <[EMAIL PROTECTED]> writes:
>Anyone have experience with string pattern matching?
>I need a fast way to match variables to strings. Example:
>string - variables
>============
>abcaaab - xyz
>abca - xy
>eeabcac - vxw
>x matches abc
>y matches a
>z matches aab
>w maches ac
>v maches ee
Off topic I know but I've been learning snobol pattern matching recently so I
thought I'd give this one a bash. Here is my effort:
define('foo(str)')
&fullscan = 1
'/abcaaab/abca/eeabcac/' '/' arb $ x arb $ y arb $ z '/' *x *y '/'
+ arb $ v *x arb $ w '/' *foo(v '/' w '/' x '/' y '/' z) :F(end)
foo output = str :(FRETURN)
end
Good eh? Here's the output:
/eeabcac//abca/aab
e/eabcac//abca/aab
ee/abcac//abca/aab
eea/bcac//abca/aab
eeab/cac//abca/aab
eeabc/ac//abca/aab
eeabca/c//abca/aab
eeabcac///abca/aab
ee/bcac/a/bca/aab
eeabc/c/a/bca/aab
ee/cac/ab/ca/aab
ee/ac/abc/a/aab
ee/c/abca//aab
Removing empty entries is quite easy:
'/abcaaab/abca/eeabcac/' '/' arb $ x arb $ y arb $ z '/' *x *y '/'
+ arb $ v *x arb $ w '/' *differ(v) *differ(w) *differ(x)
+ *differ(y) *differ(z) *foo(v '/' w '/' x '/' y '/' z) :F(end)
generates:
ee/bcac/a/bca/aab
eeabc/c/a/bca/aab
ee/cac/ab/ca/aab
ee/ac/abc/a/aab
If I get time I'll try to get this working in Sam Wilmott's Python pattern
matching library.
What fun!
Eddie
--
http://mail.python.org/mailman/listinfo/python-list
