var data = [ {userId: 8, title: 'title1'}, {userId: 11, title: 'other'}, {userId: 15, title: null}, {userId: 19, title: 'title2'} ]; var result = find(data).where({ "title": /\d$/ }).orderBy('userId', 'desc');查找data中， [{ userId: 19, title: 'title2'}, { userId: 8, title: 'title1' }]，并进行排序输出result

可以使用以下代码实现：

function find(data) {
  return {
    where: function(condition) {
      var filteredData = data.filter(function(item) {
        for (var key in condition) {
          if (condition.hasOwnProperty(key)) {
            var regex = new RegExp(condition[key]);
            if (!regex.test(item[key])) {
              return false;
            }
          }
        }
        return true;
      });
      return {
        orderBy: function(field, order) {
          filteredData.sort(function(a, b) {
            if (order === 'desc') {
              return b[field] - a[field];
            } else {
              return a[field] - b[field];
            }
          });
          return filteredData;
        }
      };
    }
  };
}

var data = [
  {userId: 8, title: 'title1'},
  {userId: 11, title: 'other'},
  {userId: 15, title: null},
  {userId: 19, title: 'title2'}
];

var result = find(data).where({ "title": /\d$/ }).orderBy('userId', 'desc');

console.log(result);

输出结果为：

[
  { userId: 19, title: 'title2' },
  { userId: 8, title: 'title1' }
]