Changes DEBUG mode behavior for duplicate items in data source from asserting to printing a warning. #45

Author: kzaher

Sources/DataSources+Rx/RxCollectionViewSectionedAnimatedDataSource.swift

@@ -50,7 +50,10 @@ public class RxCollectionViewSectionedAnimatedDataSource<S: AnimatableSectionMod
                         }
                     }
                     catch let e {
+                        #if DEBUG
+                        print("Error while binding data animated: \(e)\nFallback to normal `reloadData` behavior.")
                         rxDebugFatalError(e)
+                        #endif
                         self.setSections(newSections)
                         collectionView.reloadData()
                     }

Sources/DataSources/Differentiator.swift

@@ -104,7 +104,9 @@ func indexSections<S: AnimatableSectionModelType>(sections: [S]) throws -> [S.Id
     for (i, section) in sections.enumerate() {
         guard indexedSections[section.identity] == nil else {
             #if DEBUG
-            precondition(indexedSections[section.identity] == nil, "Section \(section) has already been indexed at \(indexedSections[section.identity]!)")
+                if indexedSections[section.identity] != nil {
+                    print("Section \(section) has already been indexed at \(indexedSections[section.identity]!)")
+                }
             #endif
             throw DifferentiatorError.DuplicateItem(item: section)
         }
@@ -127,7 +129,9 @@ func indexSectionItems<S: AnimatableSectionModelType>(sections: [S]) throws -> [
         for (j, item) in sections[i].items.enumerate() {
             guard indexedItems[item.identity] == nil else {
                 #if DEBUG
-                precondition(indexedItems[item.identity] == nil, "Item \(item) has already been indexed at \(indexedItems[item.identity]!)" )
+                    if indexedItems[item.identity] != nil {
+                        print("Item \(item) has already been indexed at \(indexedItems[item.identity]!)" )
+                    }
                 #endif
                 throw DifferentiatorError.DuplicateItem(item: item)
             }