Consider the following code:
rankedGames at: rank ifAbsentPut: [SortedCollection sortBlock: [:one :two | one name < two name]].
I've only seen this "convenience" method used a couple of times in Smalltalk code, and then there is that SortedCollection there with no direct Obj-C equivalent. What is the Objective-C equivalent?
What is the Objective-C equivalent?
There isn't a direct equivalent. NSMutableArray
gives you an ordered collection that can be sorted, so that's probably the closest to SortedCollection
. I don't know of a single-line equivalent of at:ifAbsentPut:
, so you'd normally do that in a few lines:
// assume rankedGames is an array of mutable arrays
NSMutableArray *games = rankedGames[rank];
if (games == nil) {
games = [NSMutableArray array];
}
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