apply a function to combinations

Community Support
1

hi,

i’d like to parameterize :/: with a dyadic function.


i have difficulty passing a dyadic function as illustrated in this example using , (join):



q)“123”,:/: “abc”

“1a” “2a” “3a”

“1b” “2b” “3b”

“1c” “2c” “3c”

q){[f]“123”{f[x;y]}:/:}“abc”[{x,y}]

'type


or is there a more straightforward way to provide operations to ::/ ??


thanks, ? jack.


2

"123"f/::

Should be fine

Note that f is not seen in the inner lambda

   Attila

3

thanks atilla,

> Note that f is not seen in the inner lambda

so is it possible to write a lambda that returns a lambda, keeping state like:

? oneplus:{[n]{1+n}}

? oneplusone:oneplus 1

? oneplusone 0

2

is there a recipe for generating functions specialized on parameters? ?

i guess there is eval…

4

Nope, no closures in q

Why would you need something like this?

   Attila

5

On Fri, Jan 13, 2012 at 5:19 AM, Jack Andrews wrote:> so is it possible to write a lambda that returns a lambda, keeping state> like:>> ? oneplus:{[n]{1+n}}> ? oneplusone:oneplus 1> ? oneplusone 0> 2you can sort of fake it with projectionq)oneplus:{[n;x]1+n}oneplusone:oneplus 1q)oneplusone 02