instance method Array#map
Array#map([iterator = Prototype.K[, context]]) → Array
Function) – The iterator function to apply to each element in the enumeration.
Object) – An optional object to use as
thiswithin calls to the iterator.
Returns the result of applying
iterator to each item in the array. If
no iterator is provided, the elements are simply copied to the returned
Array#map acts as an ECMAScript 5 polyfill.
It is only defined if not already present in the user's browser, and it
is meant to behave like the native version as much as possible. Consult
the ES5 specification for more