rem: logins.forEach(function(l) { usernames.push(l.username); }); 
add: var usernames = logins.map(function (l) l.username); 
context:                 logins.forEach(function(l) { usernames.push(l.username); });
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/10234/76e443fcb0e3c4c0b44f8274e3b1a4c09c682c1a/nsLoginManager.js/buggy/toolkit/components/passwordmgr/src/nsLoginManager.js