in reply to Using map to assign to a hash

The answer is in the docs for map: perldoc -f map.

 "{" starts both hash references and blocks, so "map { ..." could 
 be either the start of map BLOCK LIST or map EXPR, LIST. Because
 perl doesn’t look ahead for the closing "}" it has to take a guess
 at which its dealing with based what it finds just after the "{".
 Usually it gets it right, but if it doesn’t it won’t realize
 something is wrong until it gets to the "}" and encounters the
 missing (or unexpected) comma. The syntax error will be reported
 close to the "}" but you’ll need to change something near the "{"
 such as using a unary "+" to give perl some help ...
The docs then list some examples, i prefer the syntax BrowserUk replied with, myself. You can also use parens, FWIW:
%hash = map (("$var/$_", $_), @array);

jeffa

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
B--B--B--B--B--B--B--B--
H---H---H---H---H---H---
(the triplet paradiddle with high-hat)