m/.../ returns true or false in scalar context 
m/.../g give you a list of matches in list context 
m/(...)/ can populate an array with whatever gets captured... (??)
 
while( ) i.e. inside parenthesis is evaluated in scalar context? 
foreach( ) i.e. inside parenthesis is evaluated in list context?
 
<STDIN> returns the next line of input in list context

##</code><code>##

  DB<23> $_="aaa"
 
  DB<24> print scalar m/a/
1

##</code><code>##

 perl -e 'print prototype "CORE::push","\n"'
\@@