JavaScript递归函数，将父/子记录转换为嵌套数组
JavaScript recursive function to transform parent/child records into a nested array
我有一个Json数组，它的结构完美的剑道树列表小部件(即非常简单的树列表示例树列表);但是，我现在需要在Kendo树图小部件中呈现相同的数据。
因此，源数据是平面的，并且同时包含id和parentId字段。现在我需要递归地访问每个节点，并将其转换为嵌套数组。
我已经开始了一个包含平面源数据的plunk(文件名是"sourcedata.json")，以及样本目标数据(" treeddata .json")，如果你运行plunk，它目前会呈现剑道树图。
http://plnkr.co/edit/Cmfk8YWdm0uPrdDiJIfC?p=preview
这是源代码(供参考:"parentId": null是我的根节点)-
[
{
"id": 0,
"parentId": 6,
"typeId": 0,
"field0": "London",
"field2": 5546919.064936
},
{
"id": 1,
"parentId": 7,
"typeId": 0,
"field0": "New York",
"field2": 2297941.24812
},
{
"id": 2,
"parentId": 5,
"typeId": 0,
"field0": "Dubai",
"field2": 9832458.096596
},
{
"id": 3,
"parentId": 6,
"typeId": 0,
"field0": "Paris",
"field2": 22700818.88167
},
{
"id": 4,
"parentId": 8,
"typeId": 0,
"field0": "Stockholm",
"field2": 3742748.296602,
},
{
"id": 5,
"parentId": 9,
"typeId": 0,
"field0": "Middle East",
"field2": 9832458.096596,
},
{
"id": 6,
"parentId": 9,
"typeId": 0,
"field0": "Europe",
"field2": 31990486.243208,
},
{
"id": 7,
"parentId": 9,
"typeId": 0,
"field0": "NorthAmerica",
"field2": 2297941.24812,
},
{
"id": 8,
"parentId": 6,
"typeId": 0,
"field0": "Scandinavia",
"field2": 3742748.296602,
},
{
"id": 9,
"parentId": null,
"typeId": 0,
"field0": "World",
"field2": 44120885.587924,
},
{
"id": 10,
"parentId": 0,
"typeId": 1,
"field0": "BOND-1001",
"field2": 3985.331955,
},
{
"id": 28,
"parentId": 0,
"typeId": 1,
"field0": "IRSW-08634",
"field2": 10307.142591,
},
{
"id": 29,
"parentId": 0,
"typeId": 1,
"field0": "IRSW-08639",
"field2": 17116.371459,
},
{
"id": 58,
"parentId": 0,
"typeId": 1,
"field0": "BOND-0013",
"field2": 19029.816578,
},
{
"id": 59,
"parentId": 0,
"typeId": 1,
"field0": "BOND-0031",
"field2": -237.872707,
},
{
"id": 60,
"parentId": 0,
"typeId": 1,
"field0": "BOND-0034",
"field2": 859.61482,
},
{
"id": 61,
"parentId": 0,
"typeId": 1,
"field0": "BOND-0037",
"field2": 852.099758,
},
{
"id": 62,
"parentId": 0,
"typeId": 1,
"field0": "BOND-0043",
"field2": 4452.369428,
"field4": 1
},
{
"id": 63,
"parentId": 0,
"typeId": 1,
"field0": "BOND-0046",
"field2": -2226.184714,
},
{
"id": 64,
"parentId": 0,
"typeId": 1,
"field0": "BOND-0049",
"field2": 6612.946972,
},
{
"id": 65,
"parentId": 0,
"typeId": 1,
"field0": "BOND-0050",
"field2": 3844146.217229,
},
{
"id": 66,
"parentId": 1,
"typeId": 1,
"field0": "BOND-1002",
"field2": 3985.331955,
},
{
"id": 67,
"parentId": 1,
"typeId": 1,
"field0": "BOND-1005",
"field2": -2707.4266,
},
{
"id": 68,
"parentId": 1,
"typeId": 1,
"field0": "BOND-1008",
"field2": -2436.68394,
},
{
"id": 69,
"parentId": 1,
"typeId": 1,
"field0": "BOND-1011",
"field2": 683.959918,
},
{
"id": 70,
"parentId": 1,
"typeId": 1,
"field0": "BOND-1014",
"field2": 54716.79346,
},
{
"id": 71,
"parentId": 1,
"typeId": 1,
"field0": "BOND-1017",
"field2": 4027.155999,
},
{
"id": 72,
"parentId": 1,
"typeId": 1,
"field0": "XCSW-0046",
"field2": 604546.163294,
"node2": 2,
"field3": 498334.387729,
"node3": 3,
"field4": 1
},
{
"id": 73,
"parentId": 1,
"typeId": 1,
"field0": "IRSW-08655",
"field2": 46191.801872,
"node2": 2,
"field3": 37131.473418,
"node3": 3,
"field4": 1
},
{
"id": 74,
"parentId": 1,
"typeId": 1,
"field0": "CF-0012",
"field2": 1845434.652127,
"node2": 2,
"field3": 1438283.786114,
"node3": 3,
"field4": 1
},
{
"id": 75,
"parentId": 1,
"typeId": 1,
"field0": "CF-0017",
"field2": 46486.869315,
"node2": 2,
"field3": 36285.674082,
"node3": 3,
"field4": 1
},
{
"id": 76,
"parentId": 1,
"typeId": 1,
"field0": "CF-0002",
"field2": -593582.845166,
"node2": 2,
"field3": -402546.0446,
"node3": 3,
"field4": 1
},
{
"id": 77,
"parentId": 1,
"typeId": 1,
"field0": "CRSW-1002",
"field2": -73496.275293,
"node2": 2,
"field3": -5325.413593,
"node3": 3,
"field4": 1
},
{
"id": 78,
"parentId": 1,
"typeId": 1,
"field0": "CRSW-1005",
"field2": 20670.748989,
"node2": 2,
"field3": 27954.103116,
"node3": 3,
"field4": 1
},
{
"id": 79,
"parentId": 1,
"typeId": 1,
"field0": "CRSW-1008",
"field2": 53572.838484,
"node2": 2,
"field3": 27688.010937,
"node3": 3,
"field4": 1
},
{
"id": 80,
"parentId": 1,
"typeId": 1,
"field0": "CRSW-1011",
"field2": 58.44961,
"node2": 2,
"field3": 83.488679,
"node3": 3,
"field4": 1
},
{
"id": 81,
"parentId": 1,
"typeId": 1,
"field0": "CRSW-1014",
"field2": -296158.053382,
"node2": 2,
"field3": -288493.393334,
"node3": 3,
"field4": 1
},
{
"id": 82,
"parentId": 1,
"typeId": 1,
"field0": "CRSW-1017",
"field2": -21563.217578,
"node2": 2,
"field3": -20779.990677,
"node3": 3,
"field4": 1
},
{
"id": 83,
"parentId": 1,
"typeId": 1,
"field0": "LOAN-0012",
"field2": -16809.368436,
"node2": 2,
"field3": -16401.910829,
"node3": 3,
"field4": 1
},
{
"id": 84,
"parentId": 1,
"typeId": 1,
"field0": "LOAN-0017",
"field2": 10307.142591,
"node2": 2,
"field3": 9867.818502,
"node3": 3,
"field4": 1
},
{
"id": 85,
"parentId": 1,
"typeId": 1,
"field0": "FX-00342",
"field2": 17116.371459,
"node2": 2,
"field3": 16382.149866,
"node3": 3,
"field4": 1
},
{
"id": 86,
"parentId": 1,
"typeId": 1,
"field0": "FX-00354",
"field2": 3721.762854,
"node2": 2,
"field3": 3541.481944,
"node3": 3,
"field4": 1
},
{
"id": 87,
"parentId": 1,
"typeId": 1,
"field0": "FX-00406",
"field2": 1479.737038,
"node2": 2,
"field3": 1408.059086,
"node3": 3,
"field4": 1
},
{
"id": 88,
"parentId": 1,
"typeId": 1,
"field0": "FX-00410",
"field2": 4699.141795,
"node2": 2,
"field3": 4487.080289,
"node3": 3,
"field4": 1
},
{
"id": 89,
"parentId": 1,
"typeId": 1,
"field0": "FX-00418",
"field2": 53.411383,
"node2": 2,
"field3": -25.478062,
"node3": 3,
"field4": 1
},
{
"id": 90,
"parentId": 1,
"typeId": 1,
"field0": "FX-00426",
"field2": 1625.14897,
"node2": 2,
"field3": 2319.189521,
"node3": 3,
"field4": 1
},
{
"id": 91,
"parentId": 1,
"typeId": 1,
"field0": "FRA-0002",
"field2": -4634.930756,
"node2": 2,
"field3": -6613.572492,
"node3": 3,
"field4": 1
},
{
"id": 92,
"parentId": 1,
"typeId": 1,
"field0": "FRA-0005",
"field2": -7375.479672,
"node2": 2,
"field3": -17104.920999,
"node3": 3,
"field4": 1
},
{
"id": 93,
"parentId": 1,
"typeId": 1,
"field0": "FRA-0008",
"field2": 0,
"node2": 2,
"field3": 0,
"node3": 3,
"field4": 1
},
{
"id": 94,
"parentId": 1,
"typeId": 1,
"field0": "FRA-0011",
"field2": 125.281197,
"node2": 2,
"field3": 181.176247,
"node3": 3,
"field4": 1
},
{
"id": 95,
"parentId": 1,
"typeId": 1,
"field0": "FRA-0014",
"field2": 95.900079,
"node2": 2,
"field3": 122.515322,
"node3": 3,
"field4": 1
},
{
"id": 96,
"parentId": 1,
"typeId": 1,
"field0": "BOND-0014",
"field2": 35.094497,
"node2": 2,
"field3": 45.048084,
"node3": 3,
"field4": 1
},
{
"id": 97,
"parentId": 1,
"typeId": 1,
"field0": "BOND-0017",
"field2": 42.085388,
"node2": 2,
"field3": 61.758662,
"node3": 3,
"field4": 1
},
{
"id": 98,
"parentId": 1,
"typeId": 1,
"field0": "BOND-0023",
"field2": -1527.85633,
"node2": 2,
"field3": -7451.691034,
"node3": 3,
"field4": 1
},
{
"id": 99,
"parentId": 1,
"typeId": 1,
"field0": "BOND-0029",
"field2": -10505.835091,
"node2": 2,
"field3": -43600.76525,
"node3": 3,
"field4": 1
},
{
"id": 100,
"parentId": 1,
"typeId": 1,
"field0": "BOND-0032",
"field2": 0,
"node2": 2,
"field3": 0,
"node3": 3,
"field4": 1
},
{
"id": 101,
"parentId": 1,
"typeId": 1,
"field0": "BOND-0035",
"field2": 8.385045,
"node2": 2,
"field3": 2967.079788,
"node3": 3,
"field4": 1
},
{
"id": 102,
"parentId": 1,
"typeId": 1,
"field0": "BOND-0041",
"field2": 543.371559,
"node2": 2,
"field3": 29891.343594,
"node3": 3,
"field4": 1
},
{
"id": 103,
"parentId": 1,
"typeId": 1,
"field0": "BOND-0044",
"field2": 73.610827,
"node2": 2,
"field3": 5960.758206,
"node3": 3,
"field4": 1
},
{
"id": 104,
"parentId": 1,
"typeId": 1,
"field0": "BOND-0047",
"field2": 894.247491,
"node2": 2,
"field3": 15292.150889,
"node3": 3,
"field4": 1
},
{
"id": 105,
"parentId": 2,
"typeId": 1,
"field0": "BOND-1003",
"field2": 3985.331955,
"node2": 2,
"field3": 20567.245997,
"node3": 3,
"field4": 1
},
{
"id": 106,
"parentId": 2,
"typeId": 1,
"field0": "BOND-1006",
"field2": -2707.4266,
"node2": 2,
"field3": -13972.313856,
"node3": 3,
"field4": 1
},
{
"id": 107,
"parentId": 2,
"typeId": 1,
"field0": "BOND-1009",
"field2": -2436.68394,
"node2": 2,
"field3": -12575.082471,
"node3": 3,
"field4": 1
},
{
"id": 108,
"parentId": 2,
"typeId": 1,
"field0": "BOND-1012",
"field2": 683.959918,
"node2": 2,
"field3": 3527.163486,
"node3": 3,
"field4": 1
},
{
"id": 109,
"parentId": 2,
"typeId": 1,
"field0": "BOND-1015",
"field2": 54716.79346,
"node2": 2,
"field3": 282173.078874,
"node3": 3,
"field4": 1
},
{
"id": 110,
"parentId": 2,
"typeId": 1,
"field0": "XCSW-0004",
"field2": 4027.155999,
"node2": 2,
"field3": 20767.938605,
"node3": 3,
"field4": 1
},
{
"id": 111,
"parentId": 2,
"typeId": 1,
"field0": "XCSW-0014",
"field2": 604546.163294,
"node2": 2,
"field3": 498334.387729,
"node3": 3,
"field4": 1
},
{
"id": 112,
"parentId": 2,
"typeId": 1,
"field0": "XCSW-0017",
"field2": 46191.801872,
"node2": 2,
"field3": 37131.473418,
"node3": 3,
"field4": 1
},
{
"id": 113,
"parentId": 2,
"typeId": 1,
"field0": "XCSW-0029",
"field2": 1845434.652127,
"node2": 2,
"field3": 1438283.786114,
"node3": 3,
"field4": 1
},
{
"id": 114,
"parentId": 2,
"typeId": 1,
"field0": "XCSW-0034",
"field2": 46486.869315,
"node2": 2,
"field3": 36285.674082,
"node3": 3,
"field4": 1
},
{
"id": 115,
"parentId": 2,
"typeId": 1,
"field0": "XCSW-0045",
"field2": -593582.845166,
"node2": 2,
"field3": -402546.0446,
"node3": 3,
"field4": 1
},
{
"id": 116,
"parentId": 2,
"typeId": 1,
"field0": "XCSW-0053",
"field2": -73496.275293,
"node2": 2,
"field3": -5325.413593,
"node3": 3,
"field4": 1
},
{
"id": 117,
"parentId": 2,
"typeId": 1,
"field0": "XCSW-0072",
"field2": 20670.748989,
"node2": 2,
"field3": 27954.103116,
"node3": 3,
"field4": 1
},
{
"id": 118,
"parentId": 2,
"typeId": 1,
"field0": "IRSW-00022",
"field2": 53572.838484,
"node2": 2,
"field3": 27688.010937,
"node3": 3,
"field4": 1
},
{
"id": 119,
"parentId": 2,
"typeId": 1,
"field0": "IRSW-00030",
"field2": 58.44961,
"node2": 2,
"field3": 83.488679,
"node3": 3,
"field4": 1
},
{
"id": 120,
"parentId": 2,
"typeId": 1,
"field0": "IRSW-00037",
"field2": -296158.053382,
"node2": 2,
"field3": -288493.393334,
"node3": 3,
"field4": 1
},
{
"id": 121,
"parentId": 2,
"typeId": 1,
"field0": "IRSW-00042",
"field2": -21563.217578,
"node2": 2,
"field3": -20779.990677,
"node3": 3,
"field4": 1
},
{
"id": 122,
"parentId": 2,
"typeId": 1,
"field0": "IRSW-04172",
"field2": -16809.368436,
"node2": 2,
"field3": -16401.910829,
"node3": 3,
"field4": 1
},
{
"id": 123,
"parentId": 2,
"typeId": 1,
"field0": "IRSW-04177",
"field2": 10307.142591,
"node2": 2,
"field3": 9867.818502,
"node3": 3,
"field4": 1
},
{
"id": 124,
"parentId": 2,
"typeId": 1,
"field0": "IRSW-04182",
"field2": 17116.371459,
"node2": 2,
"field3": 16382.149866,
"node3": 3,
"field4": 1
},
{
"id": 125,
"parentId": 2,
"typeId": 1,
"field0": "IRSW-04185",
"field2": 3721.762854,
"node2": 2,
"field3": 3541.481944,
"node3": 3,
"field4": 1
},
{
"id": 126,
"parentId": 2,
"typeId": 1,
"field0": "IRSW-04192",
"field2": 1479.737038,
"node2": 2,
"field3": 1408.059086,
"node3": 3,
"field4": 1
},
{
"id": 127,
"parentId": 2,
"typeId": 1,
"field0": "IRSW-08627",
"field2": 4699.141795,
"node2": 2,
"field3": 4487.080289,
"node3": 3,
"field4": 1
},
{
"id": 128,
"parentId": 2,
"typeId": 1,
"field0": "IRSW-08632",
"field2": 53.411383,
"node2": 2,
"field3": -25.478062,
"node3": 3,
"field4": 1
},
{
"id": 129,
"parentId": 2,
"typeId": 1,
"field0": "IRSW-08637",
"field2": 1625.14897,
"node2": 2,
"field3": 2319.189521,
"node3": 3,
"field4": 1
},
{
"id": 130,
"parentId": 2,
"typeId": 1,
"field0": "IRSW-08642",
"field2": -4634.930756,
"node2": 2,
"field3": -6613.572492,
"node3": 3,
"field4": 1
},
{
"id": 131,
"parentId": 2,
"typeId": 1,
"field0": "IRSW-08647",
"field2": -7375.479672,
"node2": 2,
"field3": -17104.920999,
"node3": 3,
"field4": 1
},
{
"id": 132,
"parentId": 2,
"typeId": 1,
"field0": "IRSW-08650",
"field2": 0,
"node2": 2,
"field3": 0,
"node3": 3,
"field4": 1
},
{
"id": 133,
"parentId": 2,
"typeId": 1,
"field0": "IRSW-08652",
"field2": 125.281197,
"node2": 2,
"field3": 181.176247,
"node3": 3,
"field4": 1
},
{
"id": 134,
"parentId": 2,
"typeId": 1,
"field0": "IRSW-08657",
"field2": 95.900079,
"node2": 2,
"field3": 122.515322,
"node3": 3,
"field4": 1
},
{
"id": 135,
"parentId": 2,
"typeId": 1,
"field0": "CF-0004",
"field2": 35.094497,
"node2": 2,
"field3": 45.048084,
"node3": 3,
"field4": 1
},
{
"id": 136,
"parentId": 2,
"typeId": 1,
"field0": "CF-0014",
"field2": 42.085388,
"node2": 2,
"field3": 61.758662,
"node3": 3,
"field4": 1
},
{
"id": 137,
"parentId": 2,
"typeId": 1,
"field0": "CF-0024",
"field2": -1527.85633,
"node2": 2,
"field3": -7451.691034,
"node3": 3,
"field4": 1
},
{
"id": 138,
"parentId": 2,
"typeId": 1,
"field0": "CF-0029",
"field2": -10505.835091,
"node2": 2,
"field3": -43600.76525,
"node3": 3,
"field4": 1
},
{
"id": 139,
"parentId": 2,
"typeId": 1,
"field0": "CF-0009",
"field2": 0,
"node2": 2,
"field3": 0,
"node3": 3,
"field4": 1
},
{
"id": 140,
"parentId": 2,
"typeId": 1,
"field0": "CRSW-1003",
"field2": 8.385045,
"node2": 2,
"field3": 2967.079788,
"node3": 3,
"field4": 1
},
{
"id": 141,
"parentId": 2,
"typeId": 1,
"field0": "CRSW-1006",
"field2": 543.371559,
"node2": 2,
"field3": 29891.343594,
"node3": 3,
"field4": 1
},
{
"id": 142,
"parentId": 2,
"typeId": 1,
"field0": "CRSW-1009",
"field2": 73.610827,
"node2": 2,
"field3": 5960.758206,
"node3": 3,
"field4": 1
},
{
"id": 143,
"parentId": 2,
"typeId": 1,
"field0": "CRSW-1012",
"field2": 894.247491,
"node2": 2,
"field3": 15292.150889,
"node3": 3,
"field4": 1
},
{
"id": 144,
"parentId": 2,
"typeId": 1,
"field0": "CRSW-1015",
"field2": 1788.494983,
"node2": 2,
"field3": 30584.301778,
"node3": 3,
"field4": 1
},
{
"id": 145,
"parentId": 2,
"typeId": 1,
"field0": "LOAN-0004",
"field2": 1788.494983,
"node2": 2,
"field3": 30584.301778,
"node3": 3,
"field4": 1
},
{
"id": 146,
"parentId": 2,
"typeId": 1,
"field0": "LOAN-0014",
"field2": -1346.424043,
"node2": 2,
"field3": 2340.573474,
"node3": 3,
"field4": 1
},
{
"id": 147,
"parentId": 2,
"typeId": 1,
"field0": "LOAN-0029",
"field2": -1349.527119,
"node2": 2,
"field3": 2335.6426,
"node3": 3,
"field4": 1
},
{
"id": 148,
"parentId": 2,
"typeId": 1,
"field0": "CSA-3-1",
"field2": 16116.217709,
"node2": 2,
"field3": 6028.837728,
"node3": 3,
"field4": 1
},
{
"id": 149,
"parentId": 2,
"typeId": 1,
"field0": "CSA-5-1",
"field2": -144675.967051,
"node2": 2,
"field3": -52043.568419,
"node3": 3,
"field4": 1
},
{
"id": 150,
"parentId": 2,
"typeId": 1,
"field0": "CSA-10-1",
"field2": 302407.68631,
"node2": 2,
"field3": 109564.416581,
"node3": 3,
"field4": 1
},
{
"id": 151,
"parentId": 2,
"typeId": 1,
"field0": "CSA-101-1",
"field2": -189203.37048,
"node2": 2,
"field3": -69223.41632,
"node3": 3,
"field4": 1
},
{
"id": 152,
"parentId": 2,
"typeId": 1,
"field0": "CSA-4-1",
"field2": -955.127578,
"node2": 2,
"field3": -898.382846,
"node3": 3,
"field4": 1
},
{
"id": 230,
"parentId": 4,
"typeId": 1,
"field0": "LOAN-0030",
"field2": 4699.141795
}
]和目标数据需要有这个嵌套数组结构:
[
{
"name": "HSVaR 1D 99%, By Location",
"value":44120885.587924,
"items":[
{
"name":"NorthAmerica",
"value": 2297941.24812,
"items":[
{
"name":"New York",
"value":2297941.24812
}
]
},
{
"name":"Europe",
"value":31990486.243208,
"items":[
{
"name":"London",
"value":5546919.06
},
{
"name":"Paris",
"value":22700818.88167
},
{
"name":"Scandinavia",
"value":3742748.296602
}
]
},
{
"name":"Middle East",
"value":2959373,
"items":[
{
"name":"Dubai",
"value":9832458.096596
}
]
}
]
}
]*更新:最终工作版本-与下面用非递归例程回答的绅士相同的嵌套结果*
function parseTreeMapData(data) {
// init new array, find root node
var newJson = [];
var root = _.findWhere(data, { parentId: null });
// recurse data, starting with root node; pass in empty array
newJson = recurseTreeMapData(data, root, []);
var top = [];
top.push({ root.field0, value: root.field2, items: newJson.items });
return top;
}
function recurseTreeMapData(data, root, newData) {
// passing in the root node, get children, recurse until leaf is reached.
var child = _.where(data, { parentId: root.id });
if (child.length > 0) {
if (!newData.items){
newData.items = [];
}
for (var i = 0; i < child.length; i++){
newData.items.push(
{
id: child[i].id,
parentId: child[i].parentId,
name: child[i].field0,
value: child[i].field2
});
// recursve with current child record
recurseTreeMapData(data, child[i], newData.items[i]);
}
}
return newData;
} 提前谢谢你
鲍勃我已经编辑了你的plunk，我想我已经在这里得到了数据，尽管树状图看起来不太对。
我使用的算法是首先以新格式创建从数据id到数据元素的映射。然后我再次遍历数据，并将每个数据元素添加到其父的items数组中。因为这些都是引用，所以我们在适当的地方改变了东西，不需要拓扑排序或其他东西。
我觉得不需要递归
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