Question

我有以下JSON数据：

jobHistoryJsonLst = [{
  "uuid" : "bGd_AAABNaMAAAFQHvY0UyTa",
  "startDate" : "2015-10-01 15:22:21",
  "endDate" : "2015-10-01 15:22:24",
  "executionTime" : "0:0:2.951"
}, {
  "uuid" : "lat_AAABqh4AAAFPQ8k0U_qu",
  "startDate" : "2015-09-23 10:50:02",
  "endDate" : "2015-09-23 10:50:06",
  "executionTime" : "0:0:3.284"
}]

我想从上面的JSON对象创建两个不同的数组。一个应包含所有startDate数据，另一个应包含所有executionTime数据。

预期输出：

startDateArr = ['2015-10-01 15:22:21', '2015-09-23 10:50:02']
execTimeArr = ['0:0:2.951', '0:0:3.284']

Answer 1

您可以使用.map或简单循环，例如

var jobHistoryJsonLst = [{
  "uuid" : "bGd_AAABNaMAAAFQHvY0UyTa",
  "startDate" : "2015-10-01 15:22:21",
  "endDate" : "2015-10-01 15:22:24",
  "executionTime" : "0:0:2.951"
}, {
  "uuid" : "lat_AAABqh4AAAFPQ8k0U_qu",
  "startDate" : "2015-09-23 10:50:02",
  "endDate" : "2015-09-23 10:50:06",
  "executionTime" : "0:0:3.284"
}];

var dates = [], 
    times = [], 
    len = jobHistoryJsonLst.length, i;

for (i = 0; i < len; i++) {
  dates.push(jobHistoryJsonLst[i].endDate);
  times.push(jobHistoryJsonLst[i].executionTime);
}

console.log(dates, times);

// or with .map 

var dates = jobHistoryJsonLst.map(function (el) {
  return el.endDate;
});

var times = jobHistoryJsonLst.map(function (el) {
  return el.executionTime;
})

console.log(dates, times);

Answer 2

您可以使用map（）表示处理它两次或使用forEach一次循环并自行将其推送到数组。

jobHistoryJsonLst = [{
  "uuid" : "bGd_AAABNaMAAAFQHvY0UyTa",
  "startDate" : "2015-10-01 15:22:21",
  "endDate" : "2015-10-01 15:22:24",
  "executionTime" : "0:0:2.951"
}, {
  "uuid" : "lat_AAABqh4AAAFPQ8k0U_qu",
  "startDate" : "2015-09-23 10:50:02",
  "endDate" : "2015-09-23 10:50:06",
  "executionTime" : "0:0:3.284"
}];

var start = jobHistoryJsonLst.map( function (obj) { return obj.startDate; } );
var end = jobHistoryJsonLst.map( function (obj) { return obj.endDate; } );

//or

var start = [], 
end = [];
jobHistoryJsonLst.forEach( function(obj) { 
    start.push(obj.startDate); 
    end.push(obj.endDate); 
});

如何从JSON对象创建两个具有不同值的数组？

2 个答案: