nodejs訪問回調方法中的變量

Question

如何訪問回調之外的變量清單？ 我想訪問並返回它。

loadInventory = function() { 

var inventory = []; 

offers.loadMyInventory({ 
    appId: 730, 
    contextId: 2, 
    tradableOnly: true 

}, function (err, items) { 
    items.forEach(function (item) { 
     inventory.push({ 
      asset_id: item.id, 
      market_name: item.market_name 
     }); 
    }); 
    //Not accessible here 
}); 
}; 

Answer 1

你需要loadInventory採取回調，不管調用它會通過：

loadInventory = function (callback) { 

var inventory = []; 

offers.loadMyInventory({ 
    appId: 730, 
    contextId: 2, 
    tradableOnly: true 

}, function (err, items) { 
    items.forEach(function (item) { 
     inventory.push({ 
      asset_id: item.id, 
      market_name: item.market_name 
     }); 
    }); 
    callback(inventory); 
}); 
}; 

loadInventory(function(inventory) { 
    console.log(inventory); 
});