NSArray arrayWithObjects needs nil at the end, NSString stringWithFormat and NSLog() doesn't. Why?

Question

[NSArray arrayWithObjects:<#(id), ...#>, nil] 

[NSString stringWithFormat:<#(NSString *), ...#>]

NSLog(<#NSString *format, ...#>)

possible duplicate of Why do parameter lists in certain cocoa methods end with a nil? — jscs

Wevah Wevah · Accepted Answer · 2012-04-02T04:53:52

Because -stringWithFormat: and NSLog can infer the number of arguments based on their format strings (the first argument). -arrayWithObjects: can't.

NSArray arrayWithObjects needs nil at the end, NSString stringWithFormat and NSLog() doesn't. Why?

1 Answers