Re: Why the need for the id type?
Re: Why the need for the id type?
- Subject: Re: Why the need for the id type?
- From: mmalc Crawford <email@hidden>
- Date: Mon, 18 Jun 2007 14:25:53 -0700
On Jun 18, 2007, at 2:12 PM, Wagner Truppel wrote:
Yes, I've read that before.
You didn't say so earlier...
Now, note this sentence:
"The id data type makes it possible to substitute any type of object
at runtime."
The same would be true of some actual root class, be it NSObject or
some other, as in java's Object.
Read the rest of the paragraph...
Did you try compiling any test cases such as:
NSObject *myObject;
NSObject *anotherObject;
[myObject addObject:anotherObject];
and
id myObject;
id anotherObject;
[myObject addObject:anotherObject];
Just as the subsequent sentences in that paragraph elaborate, this
illustrates the difference between static and dynamic type checking at
compile time.
mmalc
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