therubyracer + commonsjsrb

gistfile1.txt

context = V8::Context.new timeout: timeout
js = CommonJS::Environment.new(context, path: "#{Rails.root}/lib/javascripts")
context["_"] = js.require('underscore.js')
context['data'] = "[1,2,3,4]"
source = "(function(){return _.map(JSON.parse(data), function(num){ return num * 5 });});"
res = context.eval(source)

# res is a #<V8::Function:0x007feaf195a720
# if I then try 

res.call()

#it gives me a #<V8::Array:0x007feaf1689f50