Added NSArray.replaceObjectsInRange(range, otherArray, otherRange)

[terhechte]

Added the implementation of this method as well as a test for it

[joshuatbrown]

There are now three implementations of this method:

1. PR NSMutableArray replaceObjectsInRange:withObjectsFromArray:range: #125
2. PR [NSMutableArray] replace objects in range docs/tests/impl #136
3. PR Added NSArray.replaceObjectsInRange(range, otherArray, otherRange)  #139 (this one)

Not sure which should be merged, but I'm guessing not all of them should be. :)

[parkera]

We'll try to get this sorted out...

[terhechte]

Oops sorry! I hadn't seen these other PRs. I'll do a better search next time.
Interestingly we're all using slightly different implementations:

self.replaceObjectsInRange(range, withObjectsFromArray: Array(otherArray[otherRange.toRange()!]))

vs

let slicedOtherArray = Array(otherArray[otherRange.location...otherRange.length+otherRange.location]) replaceObjectsInRange(range, withObjectsFromArray: slicedOtherArray)

vs

replaceObjectsInRange(range, withObjectsFromArray: otherArray.bridge().subarrayWithRange(otherRange))

[phausler]

so the expected call pattern in objc is:

[array getObjects:list range:otherRange];
[self replaceObjectsInRange:range withObjects:list count:otherRange.length];

this should probably hit the same type of call pattern:

var list = [AnyObject]()
array.getObjects(&list, range:otherRange)
replaceObjectsInRange(range, withObjectsFromArray:list)

this preserves subclasser expectations for performance since getObjects:range: should be the method to override as a "fast path"

[phausler]

merged in for extra unit tests