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This array convenience method takes a comma-separated list of objects ending with nil.
myArray = [NSArray arrayWithObjects:aDate, aValue, aString, nil];
What is the purpose of the nil?
Null terminated variable argument lists, or
va_lists, keep walking the list of arguments until they encounter a placeholder or sentinel, which isnil.Since the method has no way of knowing how many arguments you are passing, it needs the sentinel (
nil) to tell where the list ends.