except

Exclude items from a list

x except y    except[x;y]

Where

• x is a list
• y is a list or atom

returns a list of all items of x that are not (items of) y.

q)1 2 3 except 2
1 3
q)1 2 3 4 1 3 except 2 3
1 4 1

except uses Find to identify items of x in y.

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Find, in, within
Selection