Codec » NSDIctionary

NSDictionary and NSArray plist examples

Georg Tremmel — Fri, 30 Apr 2010 12:42:19 +0000

NSDictionary

 version="1.0" encoding="UTF-8"?>

 version="1.0">
>
	>arrayKey>
	>
		>string1>
		>string2>
		>string3>
		>string4>
	>
	>dicKey>
	>
		>key1>
		>object1>
		>key2>
		>object2>
		>key3>
		>object3>
	>
	>key2>
	>object2>
	>key3>
	>object3>
>
>

NSArray

 version="1.0" encoding="UTF-8"?>

 version="1.0">
>
	>string1>
	>string2>
	>string3>
	>
		>key1>
		>object1>
		>key2>
		>object2>
		>key3>
		>object3>
	>
	>string5>
>
>

At the end, after , there’s another CR.

writeToFile – quick file writing

Georg Tremmel — Tue, 17 Nov 2009 02:56:29 +0000

Works with:

NSDictionary
NSArray
NSData
NSString

For more complicated purposes, NSOutputStream might be the best option, but for simply writing a date or even XML this might be the simplest and fasted way.

Stepping over an Array (or Dictionary)

Georg Tremmel — Mon, 16 Nov 2009 09:20:57 +0000

NSArray *paths = [[NSFileManager defaultManager] 
	directoryContentsAtPath: NSHomeDirectory()];
="2010-04-01T02:49:15+00:00">
// either like that...
NSEnumerator *e = [paths objectEnumerator];
for (NSString *p in e) {
	NSLog(@"path: %@", p);
}
 
// or like that.
for (NSString *p in [paths objectEnumerator]) {
	NSLog(@"path: %@", p);
}

NSDictionary has both [myDict objectEnumerator] and [myDict keyEnumerator].

Fast Enumberation is a feature in Objective-C 2.0, it allows you to step over arrays and dictionaries in a fast, consice, and secure (guarded against mutations) manner.

for (NSString *p in paths) {
	NSLog(@"path: %@", p);
}
 
// or
 
NSString *p;
for (p in paths) {
	NSLog(@"path: %@", p);
}

Sometimes things are really as simple as they should be.