partials.js

/**
 * Allow underscore use of partials
 */
var underscorePartials = (function(){
    var partialCache = {};

    var mixin = {
        declarePartial: function(name, template) {
            partialCache[name] = _.template(template);
        },
        partial: function(name, data) {
            return partialCache[name](data)
        }
    };

    return mixin;

})();

_.mixin(underscorePartials)

Useful piece of code.

Is this open source? Under which terms may this be used?