Find

Z←L⍷R

Find looks for patterns R in L.
It returns a simple boolean array with the same shape as L.

L and R are arbitrary arrays. But to be useful, the rank of R should not be more than the rank of L, and both arguments should have the same type (either both character or both numeric).

If R is a scalar, then Z←L⍷R ←→ L∊R.
If R is not a scalar, then it represents a contiguous pattern, which may or may not be found in one or more places in L.

If the arguments are numeric, then the result is sensitive to ⎕CT.

Examples:


       L←3 8⍴'thirteenfourteenfifteen '
       L
thirteen
fourteen
fifteen


       L⍷'t'
1 0 0 0 1 0 0 0
0 0 0 0 1 0 0 0
0 0 0 1 0 0 0 0


       L⍷'teen'
0 0 0 0 1 0 0 0
0 0 0 0 1 0 0 0
0 0 0 1 0 0 0 0