Merge remote-tracking branch 'adambard/master'

1 files changed, 8 insertions, 2 deletions

diff --git a/objective-c.html.markdown b/objective-c.html.markdown
index cf6bf780..f130ea0c 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)
@@ -682,7 +688,7 @@ addUp = ^(int n) { // Remove (int n) to have a block that doesn't take in any pa
     mutableVar = 32; // Assigning new value to __block variable.
     return n + outsideVar; // Return statements are optional.
 }
-int addUp = add(10 + 16); // Calls block code with arguments.
+int addUp = addUp(10 + 16); // Calls block code with arguments.
 // Blocks are often used as arguments to functions to be called later, or for callbacks.
 @implementation BlockExample : NSObject