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-rw-r--r--objective-c.html.markdown8
1 files changed, 7 insertions, 1 deletions
diff --git a/objective-c.html.markdown b/objective-c.html.markdown
index cf6bf780..30bb8843 100644
--- a/objective-c.html.markdown
+++ b/objective-c.html.markdown
@@ -148,7 +148,13 @@ int main (int argc, const char * argv[])
[mutableDictionary setObject:@"value1" forKey:@"key1"];
[mutableDictionary setObject:@"value2" forKey:@"key2"];
[mutableDictionary removeObjectForKey:@"key1"];
-
+
+ // Change types from Mutable To Immutable
+ //In general [object mutableCopy] will make the object mutable whereas [object copy] will make the object immutable
+ NSMutableDictionary *aMutableDictionary = [aDictionary mutableCopy];
+ NSDictionary *mutableDictionaryChanged = [mutableDictionary copy];
+
+
// Set object
NSSet *set = [NSSet setWithObjects:@"Hello", @"Hello", @"World", nil];
NSLog(@"%@", set); // prints => {(Hello, World)} (may be in different order)