| reverse function

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1

Why does | need to be in parenthesis when used a reverse (monad function)

(|) 3 2 1 /works

/ do not work

| 3 2 1 

|[(3;2;1)] 

2

because you’re programming in q.  q replaces all monadic verbs with reserved words

|  reverse

  • flip
  • neg

..

you can access k mode by prefixing your expression with k):

q)k)|3 2 1

1 2 3 

or use \ to toggle k mode

q)\

  |3 2 1

1 2 3

i haven’t looked into exactly what () permits in q, but it includes term-adverbs (tA) pairs.