title: Disable scientific notation when converting to JSON
body: <p>I am having trouble with converting a data structure to JSON without representing numerics in scientific notation.</p>
  
  <pre><code>library(rjson)
  
  options(scipen=1000)
  
  toJSON(c(1200000000, 400000))
  
  # [1] "[1.2e+08,400000]"
  </code></pre>
  
  <p>How can I make it output <code>"[1200000000,400000]"</code> ?</p>