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A simple answer to this super simple question would be great! Here is the pseudcode:
NSMutableArray *Africa = [Lion, Tiger, Zebra];
NSMutableArray *Canada = [Polar Bear, Beaver , Loon];
NSMutableArray *Animals = *Africa + *Canada;
What I want to end up with:
Animals = [Lion, Tiger, Zebra, Polar Bear, Beaver, Loon];
What is the proper syntax to achieve this in Objective-C/ Cocoa?
Thanks so much!
554
The primary difference between NSArray and NSMutableArray is that a mutable array can be changed/modified after it has been allocated and initialized, whereas an immutable array, NSArray , cannot.
The NSMutableArray class declares the programmatic interface to objects that manage a modifiable array of objects. This class adds insertion and deletion operations to the basic array-handling behavior inherited from NSArray . NSMutableArray is “toll-free bridged” with its Core Foundation counterpart, CFMutableArray .
In Objective-C, arrays take the form of the NSArray class. An NSArray represents an ordered collection of objects. This distinction of being an ordered collection is what makes NSArray the go-to class that it is.
Creating an Array Object For example: NSArray *myColors; myColors = [NSArray arrayWithObjects: @"Red", @"Green", @"Blue", @"Yellow", nil]; The above code creates a new array object called myColors and initializes it with four constant string objects containing the strings "Red", "Green", "Blue" and "Yellow".
To create an array:
NSMutableArray* africa = [NSMutableArray arrayWithObjects: @"Lion", @"Tiger", @"Zebra", nil];
NSMutableArray* canada = [NSMutableArray arrayWithObjects: @"Polar bear", @"Beaver", @"Loon", nil];
To combine two arrays you can initialize array with elements of the 1st array and then add elements from 2nd to it:
NSMutableArray* animals = [NSMutableArray arrayWithArray:africa];
[animals addObjectsFromArray: canada];
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