如何扁平化多维数组包含对象在javascript

how to flatten multidimensional array containing objects in javascript

本文关键字：包含 对象 javascript 数组 扁平化      更新时间：2023-09-26

我有一个多维数组，里面有对象，我怎么才能使它平坦

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"}     
               ];

我认为这就是你想要做的。

首先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;
}

然后你可以循环遍历数组的数组来合并对象:

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/

引用:

  • hasOwnProperty
  • sort
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