function push(value) {
    if (value === undefined) {
      value = '';
    } else if (typeof value !== 'string') {
      value = angular.toJson(value);
    }
    result.push('' + value);
  }
Finds all bindings with the substring match of name and returns an
array of their values.

@param {string} bindExp The name to match
@return {Array.<string>} String of binding values