JRuby: how to call a Java variational function without optional arguments
I have a function with a signature similar to String.format(String, Object...)
.
I want to call this function from JRuby without the last parameters (as this is optional), but my code is calling ArgumentError
( wrong # of arguments(1 for 2)
)
Is there a way to call this function with just one argument like I would do in Java?
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1 answer
Wrap varargs in Java array
jruby-1.4.0 > java.lang.System.out.format('foo %d, %d, %d, %d, %d', [1, 2, 3, 4, 5].to_java)
foo 1, 2, 3, 4, 5 => #<Java::JavaIo::PrintStream:0x79ef3ccd>
If you only want to skip varargs pass an empty Java array instead
jruby-1.4.0 > java.lang.System.out.format('foo ', [].to_java)
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