q)(1#“<”)~/:0N!x:-4!“<< >> <> == <= >=”
(,“<”;,“<”;," “;”>>“;,” “;”<>“;,” “;,”=“;,”=“;,” “;”<=“;,” “;”>=")
1100000000000b
-4! splits a string into tokens.
it conveniently handles <=, >=, <> and >>, but not << or ==.
what magic will ‘fix’ -4! so that i get << and == tokens as well as all other tokens?
ta, jack
I probably missed the whole point of the question, but what’s wrong with vs?
" " vs “<< >> <> == <= >=”
a more true to life example:
q)x:“if(x<<y||t==u)f();”
q)(1#'“<=”)~:/:-4!x
-4! splits a string into Q Tokens (!!).
and obvisously << and == are no q tokens.
strangely >> is one, no idea why..
but there is nothing you can do. this is just how q works ;)
== is of course no q token, as comparison is done by a single =.
>=, <=, =, <> are q comparison operations
i have no idea what >> is doing..
Something like this maybe? It’s pretty brutal, but it seems to work (I think)
q)tokenize:{[tokens;str](first[r],enlist last r:{$[(t:x[1],y) in z;(x 0;t);(x[0],enlist x 1;y,())]}[;;tokens]/[(();());str]) inter tokens}
q)tokenize[" " vs “if << || == f”;“if(x<<y||t==u)f();”]
“if”
“<<”
“||”
“==”
,“f”
q)tokenize[" " vs “<< >> < > <> == <= >= =”; “<< >> < <> == <= >= f=”]
“<<”
“>>”
,“<”
“<>”
“==”
“<=”
“>=”
,“=”
On Tuesday, October 11, 2016 at 3:12:17 PM UTC+1, Markus Sieber wrote:
-4! splits a string into Q Tokens (!!).
and obvisously << and == are no q tokens.
strangely >> is one, no idea why..
but there is nothing you can do. this is just how q works ;)
== is of course no q token, as comparison is done by a single =.
>=, <=, =, <> are q comparison operations
i have no idea what >> is doing..
It appears >> has the same definition as <>
q)>>
~=
q)<>
~=
i think i found the key..
,/‘(&~((|,)’:x)in(“!=”;“||”))_x:-4!“alpha!=b||c”
(“alpha”;“!=”;,“b”;“||”;,“c”)