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PyGamer0
PyGamer0
09:30
wait ... does k allow _ in variable names?
if not then the syntax highlighting of dzaima.github.io/paste#0S7Qy4UqMN1QwUjBWMFEwVTBTMAcA#k is wrong
@dzaima ^
dzaima
dzaima
09:44
@PyGamer0 the paste syntax highlighting shouldn't be taken as anything remotely correct; that said, that is definitely wrong, and I'll fix it
PyGamer0
PyGamer0
ok
 
2 hours later…
Razetime
Razetime
11:26
@PyGamer0 k3 uses _ in reserved words, but new variables cannot use _
 
1 hour later…
coltim
coltim
12:27
@PyGamer0 somewhat confusingly q allows _ in identifiers, but k4 does not
PyGamer0
PyGamer0
what is q? the languge used by kdb+?
Razetime
Razetime
13:09
q is the query language for kdb
it's a more wordy version of k effectively
PyGamer0
PyGamer0
oh
 
1 hour later…
PyGamer0
PyGamer0
14:26
> x 0:y write lines
which one is the file name?
and does it create the file if it is not present?
oh ok so x is the filename
and it creates it automatically
PyGamer0
PyGamer0
15:08
in The APL Orchard, 1 min ago, by PyGamer0
k solution to the basic problem: {(!x)*/:!x}
can i convert ^ to tacit?
copy
copy
(*/:).!'2# there might be something shorter
coltim
coltim
you could use */:/ instead of (*/:).
PyGamer0
PyGamer0
@copy what does the . between (*/:) and !' do?
copy
copy
apply, but @coltim's fold works too
This might be helpful: codegolf.stackexchange.com/a/231590/3428
PyGamer0
PyGamer0
thanks
coltim
coltim
15:19
&=: can sub in for !'2#
PyGamer0
PyGamer0
15:48
@coltim how does that work?
coltim
coltim
@PyGamer0 it's quite golfy... =intAtom returns an identity matrix of that size; &matrix returns the "indices" of the 1's in that matrix
it's a way to get e.g. (0 1 2 3 4;0 1 2 3 4) from an input of 5
PyGamer0
PyGamer0
oh makes sense
+&=: are the coordinates of 1s in the identity matrix...

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