Easy interaction with node.js REPL.

repl.js

var local = require('repl').start('> ');

local.context.set = function(name) {
  return function(err, value) {
    if (err) throw err;
    local.context[name] = value;
  };
};

//
// Run in node to see a REPL prompt.
// Now do fun stuff like:
//    > fs.readFile('repl.js', 'utf8', set('file'))
//    undefined
//    > console.log(file)
//