On Dec 9, 2008, at 3:23 AM, Michael Day wrote:
Functions are mutable objects and could perhaps gain a potential
speed boost in some circumstances by being immutable. But that could
be achieved by a generic mechanism for making immutable objects, and
does not require introducing a new type of function.
ES3.1 has Object.freeze, but you have to call it. This is ineffecient
and slightly hazardous, compared to a declarative form that makes an
immutable function from the start. The other advantage, of course, is
better syntactic UI -- sweet sugar. Opinions vary on what's sweet, but
function dontMessWithMe() { ... }
Object.freeze(dontMessWithMe);
is not, especially if you do it hundreds of times (because you want
almost all your functions to be immutable).
/be
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