javascript - 如何在javascript中展平包含对象的多维数组

Question

我有一个包含对象的多维数组..我怎样才能展平它

myarr[0] =[{"name":"john","age":"50","location":"san diego"}
           ,{"name":"jane","age":"25","location":"new york"}
           ,{"name":"susane","age":"10","location":"los angeles"}     
               ];
myarr[1] =[{"smoker":"yes","drinker":"no","insured":"no"}
           ,{"smoker":"no","drinker":"no","insured":"yes"}
           ,{"smoker":"no","drinker":"yes","insured":"no"}     
               ];
myarr[1] =[{"status":"married","children":"none"}
           ,{"status":"unmarried","children":"one"}
           ,{"status":"unmarried","children":"two"}     
               ];

Answer 1

我认为这就是你想要做的。

首先，您需要一个简单的辅助函数来合并两个对象：

function merge(a, b) {
    a = a || { };
    for(var k in b)
        if(b.hasOwnProperty(k))
            a[k] = b[k];
    return a;
}

然后你可以遍历你的数组数组来合并对象：

var flat = [ ];
for(var i = 0; i < myarr.length; ++i)
    for(var j = 0; j < myarr[i].length; ++j)
        flat[j] = merge(flat[j], myarr[i][j]);

然后对其进行排序：

flat.sort(function(a, b) {
    a = a.location;
    b = b.location;
    if(a < b)
        return -1;
    if(a > b)
        return 1;
    return 0;
});

演示（打开 JavaScript 控制台运行）：http: //jsfiddle.net/ambiguous/twpUF/

参考：

• hasOwnProperty
• sort