how to create expander dynamically?

What are some ways to dynamically create Meteor Handlebars template helpers?

• This is purely a programming question, however StackOverflow doesn't have an "ask to answer" feature, so I'm asking this here as well. I'm also curious whether Quora could work for this kind of questions or not. Q: I have a list of i18n translation strings within an object that I'm iterating over. Instead of creating a Template Helper for each string manually though, which would soon become redundant and repetitive, I would like to create the Helpers dynamically, within a loop, like so: for (var namespace in Meteor.i18nMessages) {   for (var msg in Meteor.i18nMessages[namespace]){     //Template[namespace][msg] = __(namespace + "." + msg); // <- works but is not reactive     Template[namespace][msg] = function() { // <- Doesn't work: always returns last value from object       return __(namespace + "." + msg);     }   } } However when I do, I lose reactivity. How would one go about solving this? I'm a fan of best-practices and elegant code. http://stackoverflow.com/questions/16315122/dynamically-create-meteor-handlebars-template-helpers

• Answer:

  This solution is not pretty but it's working. for (var namespace in Meteor.i18nMessages) {   var obj = {};   for (var msg in Meteor.i18nMessages[namespace]) {     var str = 'obj["' + msg + '"] = function() { return __("' + namespace + '.' + msg + '"); }';     console.log(str);     eval(str);   }   Template[namespace].helpers(obj); }