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In the Hanyu Pinyin official romanization system for Chinese, diacritics are used to mark the tones of the syllables in which the marked vowels occur.
In orthography and collation, a letter modified by a diacritic may be treated either as a new, distinct letter or as a letter–diacritic combination.
In other alphabetic systems, diacritical marks may perform other functions.
Vowel pointing systems, namely the Arabic harakat ( ), which, respectively, mark abbreviations or acronyms, and Greek diacritical marks, which showed that letters of the alphabet were being used as numerals.
Don’t do this: let coordinator: NSPersistent Store Coordinator = // ...
let main Context = NSManaged Object Context(concurrency Type: .
directly to the persistent store means that all disk accesses during save will be done on the UI thread.// Fetch all existing objects at once let existing Objects = fetch IDs(json By ID.keys) for object in existing Objects // By now json By ID only contains objects we need to insert for (ID, json) in json By ID In two lines we just did 4 invisible fetches.Needless to say, this is wasteful and might stack up to lag our UI. For example, make it a rule to avoid oversimplifying fetches by using properties and just use functions instead: This makes the function look “slower” from the caller side and users of our API may be more wary of overusing it.As developers we just need to tame that power to suit our needs.And with i OS 10 bringing more improvements to Core Data, it’s exciting to think how much more efficient our apps can grow.