wrap nqp::sprintf - demo rubyish slurpy args

Author: dwarring

examples/rubyish/README.md

@@ -56,10 +56,11 @@ curlies `puts fruit{'bananas'}`
 
 nqp op-codes can be called like regular functions. E.g.
 ```
-    puts nqp::sprintf("pid=%s time=%d", [nqp::getpid, nqp::time_i])'
     puts nqp::if(2+2 == 4, 'yup', 'nope' )
+    def sprintf(fmt, *args) ; nqp::sprintf(fmt, args) ; end
+    puts sprintf("pid=%s time=%d", nqp::getpid, nqp::time_i)
 ```
-- this includes nqp control-flow functions:
+this includes nqp control-flow functions:
 ```
     n = 99
     nqp::while n > 0, begin

examples/rubyish/examples-rubyish/pi.rbi

@@ -2,6 +2,7 @@
 
 LIMIT = 50000
 def time() ; nqp::time_n() ; end
+def sprintf(fmt, *args) ; nqp::sprintf(fmt, args) ; end
 
 pi_over_4 = 0.0
 
@@ -17,8 +18,8 @@ while n > 0 do
     n -= 1
 end
 
-puts nqp::sprintf("(completed %d iterations in %.2f sec)",
-                  [LIMIT, time() - start_time])
+puts sprintf("(completed %d iterations in %.2f sec)",
+             LIMIT, time() - start_time)
 
 pi = pi_over_4 * 4
 puts pi