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MongoDB good practices to organize my js codebase : javascript preprocessor?
var mapFunction = function() {
    // @include lib.js
    Lib.foo(this.bar);
}

var Lib = {
    foo : function(bar) {...}
}

// construct map and reduce functions
$map = new MongoCode("function() { emit(this.user_id,1); }");
$reduce = new MongoCode("function(k, vals) { ".
    "var sum = 0;".
    "for (var i in vals) {".
        "sum += vals[i];".
    "}".
    "return sum; }");

$sales = $db->command(array(
    "mapreduce" => "events",
    "map" => $map,
    "reduce" => $reduce,
    "query" => array("type" => "sale"),
    "out" => array("merge" => "eventCounts")));