Testing support for using Streamline.js with Underscore.js.

under_.js

// streamline.options = { "callback": "_cb" }

var _ = require('underscore');
var array = [1, 2, 3];

function process(item, _cb) {
    // simulate async task
    setTimeout(_cb, 1000);
    return item;
}

_.each(array, function (item, i, array, _cb) {
    // this unfortunately doesn't "block" like you would expect it to,
    // because underscore doesn't actually pass or call the async callback.
    console.log(process(item, _cb));
});