Handlebars Subexpressions

context.json

{ "foo" : "Foo", "bar": "Bar"}

handlebars_helpers.js

Handlebars.registerHelper('eq', function (a, b) {
  return a == b;
});
Handlebars.registerHelper('neq', function (a, b) {
  return a != b;
});
Handlebars.registerHelper('ge', function (a, b) {
  return a >= b;
});
Handlebars.registerHelper('gt', function (a, b) {
  return a > b;
});
Handlebars.registerHelper('gt', function (a, b) {
  return a > b;
});

Handlebars.registerHelper('all', function () {
  var args = Array.prototype.slice.call(arguments);
  var options = args.pop();
  var i = 0;
  while (i < args.length) {
    if (!args[i]) return options.inverse(this);
    i++;
  }
  return options.fn(this);
});

Handlebars.registerHelper('any', function () {
  var args = Array.prototype.slice.call(arguments);
  var options = args.pop();
  var i = 0;
  while (i < args.length) {
    if (!!args[i]) return options.fn(this);
    i++;
  }
  return options.inverse(this);
});

template.hs

{{#all (eq foo 'Foo') (eq bar 'Bar') }}
Foo
{{else}}
Bar
{{/all}}