View source for Find

<apll>
Z←L⍷R
</apll>
<p>
<br> <b>Find</b> looks for patterns <apll>L</apll> in <apll>R</apll>.
<br> It returns a simple boolean array with the same shape as <apll>R</apll>.
<br> <br>
<apll>L</apll> and <apll>R</apll> are arbitrary arrays.
But to be useful,
the rank of <apll>L</apll>
should not be more than the rank of <apll>R</apll>,
and both arguments should have the same type
(either both character or both numeric).
<br> <br>
If <apll>L</apll> is a scalar,
then <apll>Z←L⍷R ←→ R∊L</apll>.
<br/>
If <apll>L</apll> is not a scalar,
then it represents a contiguous pattern,
which may or may not be found in one or more places in <apll>R</apll>.
<br> <br>
If the arguments are numeric,
then the result is sensitive to <apll>⎕CT</apll>.

<br> <br>
Examples:
<br> <br>
<apll>

<br/> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; R←3 8⍴'thirteenfourteenfifteen '
<br/> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; R
<br/> thirteen
<br/> fourteen
<br/> fifteen

<br> <br>
<br/> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 't'⍷R
<br/> 1 0 0 0 1 0 0 0
<br/> 0 0 0 0 1 0 0 0
<br/> 0 0 0 1 0 0 0 0

<br> <br>
<br/> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 'teen'⍷R
<br/> 0 0 0 0 1 0 0 0
<br/> 0 0 0 0 1 0 0 0
<br/> 0 0 0 1 0 0 0 0

</apll>
<br> <br>