bind.js

var f = function(value) {
  console.log('value:', value);
};

var x = f.bind(f, 'foo'); // pass 'foo' as a pre-specified argument to f(), and return it as a new function x()

x();

withasync.js

var async = require('async');
var test  = function(locals, callback) {
  console.log('locals:', locals);
  callback(null);
};

function run() {
  var locals = [ 'a', 'b', 'c' ];
  async.series([
    test.bind(test /* or null, or ... */, locals) 
  ], function(err) {
    console.log('error?', err); // should say 'error? null'
  });
}

run();