CPNull Class Reference

An object representation of nil. More...

#import <CPNull.h>

Inheritance diagram for CPNull:

List of all members.

Instance Methods
(void)	- encodeWithCoder:
(id)	- initWithCoder:
(BOOL)	- isEqual:
(id)	- valueForKey:
Class Methods
(CPNull)	+ null

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Detailed Description

An object representation of nil.

This class is used as an object representation of nil. This is handy when a collection only accepts objects as values, but you would like a nil representation in there.

Definition at line 273 of file CPKeyValueCoding.j.

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Method Documentation

- (void) encodeWithCoder:

(CPCoder)

aCoder

Writes out nothing to the specified coder.

Parameters:

aCoder

the coder to which nothing will be written

Definition at line 83 of file CPNull.j.

- (id) initWithCoder:

(CPCoder)

aCoder

Returns CPNull null.

Parameters:

aCoder

the coder from which to do nothing

Returns:

[CPNull null]

Definition at line 73 of file CPNull.j.

- (BOOL) isEqual:

(id)

anObject

Definition at line 60 of file CPNull.j.

+ (CPNull) null

Returns the singleton instance of the CPNull object. While CPNull and nil should be interpreted as the same, they are not equal ('==').

Definition at line 52 of file CPNull.j.

- (id) valueForKey:

(CPString)

aKey

Reimplemented from CPObject.

Definition at line 275 of file CPKeyValueCoding.j.

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The documentation for this class was generated from the following files:

• Foundation/CPKeyValueCoding.j
• Foundation/CPNull.h
• Foundation/CPNull.j