Why is 'for(var item in list)' with arrays considered bad practice in JavaScript?

Question

Given a simple zero based, numerically indexed array:

var list = [\'Foo\', \'Bar\', \'Baz\'];

Many times, I have noticed that when someone

Answer 1

Add list.foo = bar; and try to use simple for. If you don't use some libraries(like prototypeJs) and don't add any new properties to array object - you can use simple for-statement.