conditional on last item in array using handlebars.js template

Question

I am leveraging handlebars.js for my templating engine and am looking to make a conditional segment display only if it is the last item in array contained in the templates c

Answer 1

I made a little improvements in helper from Matt Brennan, you can use this helper with Objects or Arrays, this solution required Underscore library:

Handlebars.registerHelper("foreach", function(context, options) {
  options = _.clone(options);
  options.data = _.extend({}, options.hash, options.data);

  if (options.inverse && !_.size(context)) {
    return options.inverse(this);
  }

  return _.map(context, function(item, index, list) {
    var intIndex = _.indexOf(_.values(list), item);

    options.data.key = index;
    options.data.index = intIndex;
    options.data.isFirst = intIndex === 0;
    options.data.isLast = intIndex === _.size(list) - 1;

    return options.fn(item, options);
  }).join('');
});

Usage:

{{#foreach foo}}
    
{{@key}} - {{@index}}
{{/foreach}}