Iglistkit: Two Object List Diffing Question

[FazeelAkhtar]

Hello ,

I am doing manual Diff btw two object list , and as result i get an indexeSet of inserts updated and deleted item which contains different ranges , i want to as is there any way to get real objects as well instead of just index or ranges ?

Thanks
Fazeel

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General information

• IGListKit version:
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[rnystrom]

Hey @fazilakhter! Good question.

Since you should have both the old and new array, you should be able to get the objects using the changeset + those arrays!

let o = [some, old, stuff]
let n = [new, hotness]
let result = IGListDiff(o, n, .equality)

for delete in result.deletes {
    print("deleted \(o[delete]) at old index \(delete)")
}

for update in result.updates {
    print("updated \(o[update]) at old index \(update)")
}

for insert in result.inserts {
    print("inserted \(n[insert]) at new index \(insert)")
}

for move in result.moves {
    print("moved \(o[move.from]) from old index \(move.from) to \(move.to)")
}

You can also use these methods to lookup the old/new index of an object using its diffIdentifier.

If this answers your question feel free to close ☺️

[FazeelAkhtar]

Nice.

[fanthus]

You can also use these methods to lookup the old/new index of an object using its diffIdentifier.

@rnystrom @FazeelAkhtar After I read annotation of - (NSInteger)newIndexForIdentifier:(id<NSObject>)identifier; this method. I'm confused, to my understanding, this method is returned the index of the corresponding identifier of the compared new array. Am I right? I have write a demo, it is my expected result. However, the annotation still make me confused.