使用InMemoryDataService创建多个json对象

Question

我正在使用InMemoryDataService来模拟Web服务器，并且我能够成功返回一个json对象。

我试图使用相同的方法返回多个json对象，但不确定如何。 下面是代码，并希望再添加一个对象作为'inMemCall'

由于

export class InMemoryDataService {
  createDb() {  
    let inMemCall = [
    {
      category: 'Appetizers',
      details: [{
                 title: 'Item x1',
                 price:'40.00', 
                 description:'testing World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! '
                },
                {
                 title: 'Item x2',
                 price:'42.00', 
                 description:'Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! '
                },
                {
                 title: 'Item x3',
                 price:'44.00', 
                 description:'Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! '
                }]
    },
    {
      category: 'Soups and Salads',
      details: [{
                 title: 'Item x4',
                 price:'40.00', 
                 description:'Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! '
                },
                {
                 title: 'Item x5',
                 price:'42.00', 
                 description:'Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! '
                },
                {
                 title: 'Item x6',
                 price:'44.00', 
                 description:'Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! '
                }]
    },
    {
      category: 'Entre',
      details: [{
                 title: 'Item x7',
                 price:'40.00', 
                 description:'Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! '
                },
                {
                 title: 'Item x8',
                 price:'42.00', 
                 description:'Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! '
                }]
    },
    {
      category: 'Sides',
      details: [{
                 title: 'Item x9',
                 price:'40.00', 
                 description:'Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! '
                }]
    },
    {
      category: 'Deserts',
      details: [{
                 title: 'Item x10',
                 price:'40.00', 
                 description:'Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! '
                },
                {
                 title: 'Item x11',
                 price:'42.00', 
                 description:'Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! '
                }]
    },
    {
      category: 'Drinks',
      details: [{
                 title: 'Item x12',
                 price:'40.00', 
                 description:'Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! '
                },
                {
                 title: 'Item x13',
                 price:'42.00', 
                 description:'Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! '
                },{
                 title: 'Item x14',
                 price:'40.00', 
                 description:'Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! '
                },
                {
                 title: 'Item x15',
                 price:'42.00', 
                 description:'Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! '
                }]
    }
  ];
    return {inMemCall};
  }
}