在nodejs中合并两个数组

Question

该函数将返回一个包含商店细节和图像的数组。

function listshops(callback) 
    { 
    var array=[3,4]; 
     async.each(array,function(dat,callback){ 

     async.parallel([ 

      function(callback){ 
       c function listshops(callback) 
    { 
    var array=[3,4];/*shopId*/ 
     async.each(array,function(dat,callback){ 

     async.parallel([ 

      function(callback){ 
       client.connection.query('select * from shop where shopId=?',dat,function(err,data1){ 
       callback(null,data1); 

       }); 
      },  

      function (callback) { 
       client.connection.query('select * from image where shopId=?',dat,function(err,data2){ 
       callback(null,data2); 

       }); 
      } 
     ], 
     function(err,data) 
     { 
     console.log(data); 

     }); 
    }); 

    } 

对于上述代码的输出是:: http://i.stack.imgur.com/laxf8.png

我需要包含店铺信息和图像转换成单个array.That阵列合并与相应的图像店铺信息。

[ 
    { shopId: 3, shopName: '1', address: 'abc', contactNumber: 1234 }, 
    { imageId: 1, shopId: 3, imageUrl: 'aaa' }, 
    { imageId: 2, shopId: 3, imageUrl: 'bbb' } 
] 

Answer 1

你可以通过平坦化阵列降低： [[1]，[2]] - >并[1,2]

var array = [[1,2],[3]]; 
array.reduce(function(prev, curr) { 
    return prev.concat(curr); 
}); 

在你的情况：

function listshops(callback) 
    { 
    var array=[3,4];/*shopId*/ 
     async.each(array,function(dat,callback){ 

     async.parallel([ 

      function(callback){ 
       client.connection.query('select * from shop where shopId=?',dat,function(err,data1){ 
       callback(null,data1); 

       }); 
      },  

      function (callback) { 
       client.connection.query('select * from image where shopId=?',dat,function(err,data2){ 
       callback(null,data2); 

       }); 
      } 
     ], 
     function(err,data) 
     { 
      var result = data.reduce(function(prev, curr) { 
       return prev.concat(curr); 
      }); 
      console.log(result); 
     }); 
    }); 

    }