我的数据如下。
data=[ {"venue":"Foyer","values":[{"avg":996.8,"sessions":[{"minTime":0,"maxTime":599,"count":50},
{"minTime":600,"maxTime":1199,"count":39},
{"minTime":1800,"maxTime":2399,"count":43},
{"minTime":2400,"maxTime":2999,"count":48}],"timestamp":1449360000},
{"avg":986.4,"sessions":[{"minTime":0,"maxTime":599,"count":152},
{"minTime":600,"maxTime":1199,"count":51},
{"minTime":1200,"maxTime":1799,"count":36},
{"minTime":1800,"maxTime":2399,"count":68},
{"minTime":3000,"maxTime":3599,"count":34}],"timestamp":1452540000}]},
{"venue":"Venue1","values":[{"avg":996.8,"sessions":[{"minTime":0,"maxTime":599,"count":62},
{"minTime":600,"maxTime":1199,"count":33},
{"minTime":1800,"maxTime":2399,"count":37},
{"minTime":2400,"maxTime":2999,"count":24}],"timestamp":1449360000},
{"avg":986.4,"sessions":[{"minTime":0,"maxTime":599,"count":34},
{"minTime":600,"maxTime":1199,"count":52},
{"minTime":1200,"maxTime":1799,"count":21},
{"minTime":1800,"maxTime":2399,"count":142},
{"minTime":3000,"maxTime":3599,"count":23}],"timestamp":1452540000}]},
{"venue":"Venue2","values":[{"avg":996.8,"sessions":[{"minTime":0,"maxTime":599,"count":44},
{"minTime":600,"maxTime":1199,"count":25},
{"minTime":1800,"maxTime":2399,"count":34},
{"minTime":2400,"maxTime":2999,"count":23}],"timestamp":1449360000},
{"avg":986.4,"sessions":[{"minTime":0,"maxTime":599,"count":31},
{"minTime":600,"maxTime":1199,"count":11},
{"minTime":1200,"maxTime":1799,"count":122},
{"minTime":1800,"maxTime":2399,"count":12},
{"minTime":3000,"maxTime":3599,"count": 3}],"timestamp":1452540000}]}]
我想从仅具有匹配时间戳的“值”中过滤记录。应过滤“values”中不匹配时间戳的条目，但输出应具有相同的数据结构，
预期输出:
[{"venue":"Foyer","values":[{"avg":996.8,"sessions":[{"minTime":0,"maxTime":599,"count":50},
{"minTime":600,"maxTime":1199,"count":39},
{"minTime":1800,"maxTime":2399,"count":43},
{"minTime":2400,"maxTime":2999,"count":48}],"timestamp":1449360000}]},
{"venue":"Venue1","values":[{"avg":996.8,"sessions":[{"minTime":0,"maxTime":599,"count":62},
{"minTime":600,"maxTime":1199,"count":33},
{"minTime":1800,"maxTime":2399,"count":37},
{"minTime":2400,"maxTime":2999,"count":24}],"timestamp":1449360000}]},
{"venue":"Venue2","values":[{"avg":996.8,"sessions":[{"minTime":0,"maxTime":599,"count":44},
{"minTime":600,"maxTime":1199,"count":25},
{"minTime":1800,"maxTime":2399,"count":34},
{"minTime":2400,"maxTime":2999,"count":23}],"timestamp":1449360000}]}]
我尝试使用以下代码，但只出现了最后一个 field (venue2)。
代码:
d3.json("Dwell.json", function(error,data){
data.forEach(function(a) {
resultfilter={ "venue": a.venue, "values":a.values.filter(function (d) { return d.timestamp = 1449360000 } ) }
})
document.write('<pre>' + JSON.stringify(resultfilter) + '</pre>');
最佳答案
这是因为你覆盖了 resultfilter每次运行 forEach称呼。
您可能想做类似 resultfilter.push( <FILTER RESULT>) 的事情在每个 forEach首次初始化 resultfilter 后循环大批。像这样的事情:
resultfilter = [];
data.forEach(function(a) {
resultfilter.push(...);
})
(另外，看起来您复制的 data 对象有一些问题。如果它与复制/粘贴到此问题无关，那么也请检查一下)
关于javascript - 根据内部数组值跳过 JSON 数据记录 - D3，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/34971841/