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Raze In | e. _ _ _ | Member (In)

`e.y` produces a boolean result that determines for each atom of`y` whether its open contains an item of the raze of`y` . |  | If`x` has the shape of an item of`y` ,`` then`x e. y` is`1` if`x` matches an item of`y` .`` In general,`x e. y` ↔`(#y)>y i. x` . The fit conjunction provides tolerant comparison, as in`e.!.t` .

For example:

       ]y=:'abc';'dc';'a'
    +---+--+-+
    |abc|dc|a|
    +---+--+-+

       ;y
    abcdca

       e. y
    1 1 1 0 1 1
    0 0 1 1 1 0
    1 0 0 0 0 1

       f=: ] e.~&>/ ;
       f y
    1 1 1 0 1 1
    0 0 1 1 1 0
    1 0 0 0 0 1

       'cat' e. 'abcd'
    1 1 0

       ]z=: 2 3$'catdog'
    cat
    dog

       'cat' e. z
    1

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