在javascript中嵌套for循环

Question

我需要从一个复杂的JavaScript对象内提取字符串属性。

这里是我的情况：

for (var key in results) { 
    console.log(results[key]); 
     ...results[key] is an object that returns few arrays and properties 
      ...i need to capture an array inside named "all_names" 
       ...again loop through all the objects in the array "all_names" 
        ...all the objects have a property name called "first_name" 
         ...i need to capture the "first_name" that have the value "Paul" 

} 

样本数据：

后的console.log（结果[关键]）;
“all_names”：数组[7]
地址： “一些地址”
org_number： “TV146”

然后通过 “all_names”
“first_name的” 循环 “保罗”
“姓氏”： “Henson”

捕获“Paul”

请帮忙。

Answer 1

无论何时您拥有数组属性，您都可以像使用结果一样使用for (var x in arr)。如果没有一个示例对象，从你的描述去，您有：

results[].all_names[].first_name 

这给

for (var key in results) 
{ 
    //...results[key] is an object that returns few arrays and properties 
    //...I need to capture an array inside named "all_names" 
    //...loop through all the objects in the array "all_names" 
    for (var namekey in results[key].all_names) 
    { 
     // all the objects have a property name called "first_name" 
     // ...i need to capture the "first_name" that have the value "Paul" 
     if (results[key].all_names[namekey].first_name == 'Paul') { 
      // will always be "Paul" 
      console.log(results[key].all_names[namekey].first_name); 

      //perhaps: console.log(key); 
     } 
    } 
} 

Answer 2

for (var key in results) { 
    results[key]["all_names"].forEach(function (obj) { 
     if (obj["first_name"] === "Paul") { 
      // this is Paul 
     } 
    }); 
}