Find R←X⍷Y

X and Y may be any arrays. R is a simple Boolean array the same shape as Y which identifies occurrences of X within Y.

If the rank of X is smaller than the rank of Y, X is treated as if it were the same rank with leading axes of size 1. For example a vector is treated as a 1-row matrix.

If the rank of X is larger than the rank of Y, no occurrences of X are found in Y.

⎕CT and ⎕DCT are implicit arguments of Find.

Examples

      'AN'⍷'BANANA'
0 1 0 1 0 0

      'ANA'⍷'BANANA'
0 1 0 1 0 0

      'BIRDS' 'NEST'⍷'BIRDS' 'NEST' 'SOUP'
1 0 0

      MAT
IS YOU IS
OR IS YOU
ISN'T
      'IS'⍷MAT
1 0 0 0 0 0 0 1 0
0 0 0 1 0 0 0 0 0
1 0 0 0 0 0 0 0 0
      'IS YOU'⍷MAT
1 0 0 0 0 0 0 0 0
0 0 0 1 0 0 0 0 0
0 0 0 0 0 0 0 0 0