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我有一个JSON文件象下面这样:保存JSON值作为另一个JSON文件
{
"soils": [{
"mukey": "658854",
"mukeyName": "Meggett-Kenansville-Garcon-Eunola-Blanton-Bigbee (s1517)",
"sl_source": "Fl soil map",
"cokey": "3035468",
"soilName": "Eunola",
"comppct_r": 20,
"compArea": "9.96",
}],
"asfirs": [{
"long": -82.96896600817682,
"lat": 29.977675992923395
}],
"polygon": [{
"rings": [
[
[-9235836.910744485,
3501136.0564117758
],
[-9235798.692230342,
3500237.921329426
],
[-9236553.507884657,
3500667.87961353
],
[-9235836.910744485,
3501136.0564117758
]
]
],
"spatialReference": {
"wkid": 102100,
"latestWkid": 3857
}
}]
}
我想多边形键的值提取到另一个JSON对象,像下面
{
"rings": [
[
[-9161396.799823288,
3453315.140590871
],
[-9160708.866568722,
3453095.3841345515
],
[-9161349.02668061,
3452751.4175072685
],
[-9161396.799823288,
3453315.140590871
]
]
],
"spatialReference": {
"wkid": 102100,
"latestWkid": 3857
}
}
现在,当我做使用
var key3 = 'polygon';
var newPolygonJSON = polygonJson[key3];
var text = JSON.stringify(newPolygonJSON);
它放在polgonJson
包含我最初的JSON文件,我得到一个额外的[]
bracke这不允许我创建适当的JSON文件,如下所示。
[{
"rings": [
[
[-9235836.910744485,
3501136.0564117758
],
[-9235798.692230342,
3500237.921329426
],
[-9236553.507884657,
3500667.87961353
],
[-9235836.910744485,
3501136.0564117758
]
]
],
"spatialReference": {
"wkid": 102100,
"latestWkid": 3857
}
}]
如何摆脱这些[]
括号或正确提取值?
简单:'text [0]' – str
@str。这是错误的。变量'text'是字符串类型,所以'text [0] ==='[''。 – 2016-08-24 15:28:13
确实,它应该是'newPolygonJSON [0]'。 – str