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Leopard Technical Q&As: Cocoa
Data management in Cocoa involves the creation and handling of the various types of data available to a program, such as strings, collections, binary data, dates, property lists, and XML data. Using the Cocoa programming interfaces for these types, developers can, for example, calculate the interval between two dates or record operations so that users can reverse an operation's effect.
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CFXML to CFPropertyListRef (and back!) (HTML) (日本語 HTML)
QA1208: Describes to how save and restore a CFPropertyListRef to and from an XML file.
 2003-08-29
BOM characters in 'utxt' clipboard flavor (HTML) (日本語 HTML)
QA1221: Explains the use of the BOM character in 'utxt' scrap data
 2003-01-20
Why does -stringByTrimmingCharactersInSet: give me an empty string result when it shouldn't? (HTML) (日本語 HTML)
QA1202: Why -stringByTrimmingCharactersInSet: sometimes returns an empty string result in Mac OS X 10.2.x when it shouldn't.
 2002-10-15
Setting environment variables for user processes (HTML)
QA1067: Tells how to set environment variables for user processes.
 2001-10-25