我目前有一个如下所示的对象数组:
[{day:"Monday", Country:"America", cases:200},
{day:"Monday", Country:"India", cases:120},
{day:"Monday", Country:"Germany", cases:20},
{day:"Tuesday", Country:"America", cases:210},
{day:"Tuesday", Country:"India", cases:110},
{day:"Tuesday", Country:"Germany", cases:35},
{day:"Wednesday", Country:"America", cases:250},
{day:"Wednesday", Country:"India", cases:150},
{day:"Wednesday", Country:"Germany", cases:50}]
我正试图找出最好的方法来重组这些数据,使其看起来像这样:
[{day:"Monday", "America":200, "India":120, "Germany":20},
{day:"Tuesday", "America":210, "India":110, "Germany":35},
{day:"Wednesday", "America":250, "India":150, "Germany":50}]
有没有人能提供一些建议,以及重构javascript对象的好资源?
1条答案
按热度按时间1qczuiv01#
我们可以使用array.reduce按天,然后按国家创建案例摘要。
我们从创建案例Map开始,键入
day
,然后我们使用object.values将此Map转换为数组。我建议,无论何时您希望重新构造阵列,请查看array.map、array.filter和array.reduce,这些都是更改阵列结构的强大方法。