@var = something1 grep {
         something2 &&
         something3
       } map {
         something4
       } keys %something5;

##</code><code>##

@var = something1
       grep { something2 && something3 }
       map  { something4 }
       keys %something5;

##</code><code>##

@var = something1
       grep { something2 }
       grep { something3 }
       map  { something4 }
       keys %something5;

##</code><code>##

if( $var1 == 1 ) {
    if( $var2 == 2 ) {
         doSomething();
    }
}

##</code><code>##

if( $var1 == 1 && $var2 == 2 ) {
     doSomething();
}