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| E. _ _ | Member of Interval

|  | The ones in`x E. y` indicate the beginning points of occurrences of the pattern`x` in`y` .

For example:

       'co' E. 'cocoa'
    1 0 1 0 0

       s #~ -. '**' E. s=: 'Remove***multiple**stars.'
    Remove*multiple*stars.

       ] x =: 0 1 2 ,: 2 3 4
    0 1 2
    2 3 4

       ] y=: 5 | i. 5 7
    0 1 2 3 4 0 1
    2 3 4 0 1 2 3
    4 0 1 2 3 4 0
    1 2 3 4 0 1 2
    3 4 0 1 2 3 4

       x E. y
    1 0 0 0 0 0 0
    0 0 0 1 0 0 0
    0 1 0 0 0 0 0
    0 0 0 0 1 0 0
    0 0 0 0 0 0 0

       ($x) x&-: ;. 3 y
    1 0 0 0 0 0 0
    0 0 0 1 0 0 0
    0 1 0 0 0 0 0
    0 0 0 0 1 0 0
    0 0 0 0 0 0 0

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