X must be a scalar or vector. R is a vector of the elements of X excluding those elements which occur in Y taken in the order in which they occur in X.
Elements of X and Y are considered the same if X≡Y returns 1 for those elements.
⎕CT and ⎕DCT are implicit arguments of Excluding. Excluding is also known as Without.
'HELLO'~'GOODBYE' HLL 'MONDAY' 'TUESDAY' 'WEDNESDAY'~'TUESDAY' 'FRIDAY' MONDAY WEDNESDAY 5 10 15~⍳10 15
For performance information, see Search Functions and Hash Tables.