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argument that specifies the formatting of the output, and any number of arguments that provide the values to be formatted. variadic functions can expose type-safety problems in some languages. for instance, c's printf, if used incautiously, can give rise to a class of security holes known as format string
# [ , ], single argurment fills up array zaz( , , , [ , ]); # [ , [ , ]], behaving as **@ zaz( , , , [ , ], [ ]); # [ , [ , ], [ ]], behaving as **@ in ruby[ edit ] def foo(*args) print args end foo( ) # prints '[ ]=> nil' foo( , ) # prints '[ , ]=> nil' in swift[ edit ] func greet(timeoftheday: string...
https://en.wikipedia.org/wiki/Variadic_functions