我需要计算有多少个MAC地址存在文档级别的损害
我试图从该网站的另一个示例中解决此过滤器，但是问题是我需要计算有多少个MAC地址的损害名称为“ docsis-level”
[
{
"mac": "BC:2E:48:D7:E6:EF",
"timestamp": "2019-05-06T06:06:13.568Z",
"impairments": [
{
"name": "level",
"impaired": true,
"startFrequency": 76.279,
"stopFrequency": 953.721,
"level": 52.4
},
{
"name": "tilt",
"impaired": false,
"startFrequency": 123,
"stopFrequency": 795,
"level": 8.28
},
{
"name": "roll-off",
"impaired": false,
"startFrequency": 699,
"stopFrequency": 795,
"level": 0
},
{
"name": "suck-out",
"impaired": false,
"startFrequency": 0,
"stopFrequency": 0,
"level": 0
},
{
"name": "peak",
"impaired": false,
"startFrequency": 0,
"stopFrequency": 0,
"level": 0
},
{
"name": "ripple",
"impaired": true,
"startFrequency": 119.932,
"stopFrequency": 798.037,
"level": 0
},
{
"name": "fm-ingress",
"impaired": false,
"startFrequency": 0,
"stopFrequency": 0,
"level": 0
},
{
"name": "lte-ingress",
"impaired": false,
"startFrequency": 0,
"stopFrequency": 0,
"level": 0
},
{
"name": "adjacency",
"impaired": false,
"startFrequency": 179.982,
"stopFrequency": 186.018,
"level": 1.3
},
{
"name": "channel-snr",
"impaired": false,
"startFrequency": 141.025,
"stopFrequency": 141.025,
"level": 33.7
},
{
"name": "channel-level",
"impaired": true,
"startFrequency": 639.014,
"stopFrequency": 639.014,
"level": 27.47
},
{
"name": "channel-tilt",
"impaired": false,
"startFrequency": 165.107,
"stopFrequency": 165.107,
"level": 1.21
},
{
"name": "channel-icfr",
"impaired": false,
"startFrequency": 752.803,
"stopFrequency": 752.803,
"level": 6.4
},
{
"name": "channel-guard-band",
"impaired": true,
"startFrequency": 531.025,
"stopFrequency": 531.025,
"level": -32.33
},
{
"name": "correctable-cer",
"impaired": false,
"startFrequency": 603,
"stopFrequency": 603,
"level": 0
},
{
"name": "uncorrectable-cer",
"impaired": false,
"startFrequency": 603,
"stopFrequency": 603,
"level": 0
},
{
"name": "docsis-snr",
"impaired": false,
"startFrequency": 639,
"stopFrequency": 639,
"level": 38.9
},
{
"name": "docsis-level",
"impaired": false,
"startFrequency": 633,
"stopFrequency": 633,
"level": 7.8
}
],
"ofdmData": {
"numChannels": 0,
"numProfiles": 0
}
},
{
"mac": "BC:2E:48:D7:EA:24",
"timestamp": "2019-05-06T06:06:13.536Z",
"impairments": [
{
"name": "level",
"impaired": true,
"startFrequency": 76.279,
"stopFrequency": 953.721,
"level": 52.6
},
{
"name": "tilt",
"impaired": false,
"startFrequency": 123,
"stopFrequency": 795,
"level": 8.69
},
{
"name": "roll-off",
"impaired": false,
"startFrequency": 699,
"stopFrequency": 795,
"level": 0
},
{
"name": "suck-out",
"impaired": false,
"startFrequency": 0,
"stopFrequency": 0,
"level": 0
},
{
"name": "peak",
"impaired": false,
"startFrequency": 0,
"stopFrequency": 0,
"level": 0
},
{
"name": "ripple",
"impaired": false,
"startFrequency": 0,
"stopFrequency": 0,
"level": 0
},
{
"name": "fm-ingress",
"impaired": false,
"startFrequency": 0,
"stopFrequency": 0,
"level": 0
},
{
"name": "lte-ingress",
"impaired": false,
"startFrequency": 0,
"stopFrequency": 0,
"level": 0
},
{
"name": "adjacency",
"impaired": false,
"startFrequency": 179.982,
"stopFrequency": 186.018,
"level": 1.4
},
{
"name": "channel-snr",
"impaired": false,
"startFrequency": 141.025,
"stopFrequency": 141.025,
"level": 36.1
},
{
"name": "channel-level",
"impaired": true,
"startFrequency": 639.014,
"stopFrequency": 639.014,
"level": 27.46
},
{
"name": "channel-tilt",
"impaired": false,
"startFrequency": 687.002,
"stopFrequency": 687.002,
"level": 0.65
},
{
"name": "channel-icfr",
"impaired": false,
"startFrequency": 392.861,
"stopFrequency": 392.861,
"level": 5.4
},
{
"name": "channel-guard-band",
"impaired": true,
"startFrequency": 507.061,
"stopFrequency": 507.061,
"level": -32.9
},
{
"name": "correctable-cer",
"impaired": false,
"startFrequency": 693,
"stopFrequency": 693,
"level": 0
},
{
"name": "uncorrectable-cer",
"impaired": false,
"startFrequency": 693,
"stopFrequency": 693,
"level": 0
},
{
"name": "docsis-snr",
"impaired": false,
"startFrequency": 651,
"stopFrequency": 651,
"level": 39.3
},
{
"name": "docsis-level",
"impaired": false,
"startFrequency": 651,
"stopFrequency": 651,
"level": 8
}
],
"ofdmData": {
"numChannels": 0,
"numProfiles": 0
}
},
{
"mac": "B0:39:56:4B:B2:38",
"timestamp": "2019-05-06T05:05:34Z",
"impairments": [
{
"name": "channel-snr",
"impaired": false,
"startFrequency": 663,
"stopFrequency": 663,
"level": 0
},
{
"name": "channel-level",
"impaired": false,
"startFrequency": 663,
"stopFrequency": 663,
"level": 0
},
{
"name": "channel-tilt",
"impaired": false,
"startFrequency": 663,
"stopFrequency": 663,
"level": 0
},
{
"name": "channel-icfr",
"impaired": false,
"startFrequency": 663,
"stopFrequency": 663,
"level": 0
},
{
"name": "channel-guard-band",
"impaired": false,
"startFrequency": 663,
"stopFrequency": 663,
"level": 0
},
{
"name": "correctable-cer",
"impaired": false,
"startFrequency": 663,
"stopFrequency": 663,
"level": 0
},
{
"name": "uncorrectable-cer",
"impaired": false,
"startFrequency": 663,
"stopFrequency": 663,
"level": 0
},
{
"name": "docsis-snr",
"impaired": false,
"startFrequency": 645,
"stopFrequency": 645,
"level": 39
},
{
"name": "docsis-level",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": -5.9
},
{
"name": "ofdm-mer-mean",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 38.85
},
{
"name": "ofdm-mer-sd",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 0.58
},
{
"name": "ofdm-amp-mean",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 0.02
},
{
"name": "ofdm-amp-rms",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 0.4
},
{
"name": "ofdm-amp-slope",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": -0.013
},
{
"name": "ofdm-amp-pk-pk",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 2.93
},
{
"name": "ofdm-gd-mean",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 1778
},
{
"name": "ofdm-gd-rms",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 17.26
},
{
"name": "ofdm-gd-slope",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 0.029
},
{
"name": "ofdm-gd-pk-pk",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 86.79
},
{
"name": "ofdm-plc-cwer",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 0
},
{
"name": "ofdm-ncp-fail",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 0
}
],
"ofdmData": {
"numChannels": 1,
"numProfiles": 4
}
},
{
"mac": "B0:39:56:4C:BF:40",
"timestamp": "2019-05-06T05:05:34Z",
"impairments": [
{
"name": "channel-snr",
"impaired": false,
"startFrequency": 663,
"stopFrequency": 663,
"level": 0
},
{
"name": "channel-level",
"impaired": false,
"startFrequency": 663,
"stopFrequency": 663,
"level": 0
},
{
"name": "channel-tilt",
"impaired": false,
"startFrequency": 663,
"stopFrequency": 663,
"level": 0
},
{
"name": "channel-icfr",
"impaired": false,
"startFrequency": 663,
"stopFrequency": 663,
"level": 0
},
{
"name": "channel-guard-band",
"impaired": false,
"startFrequency": 663,
"stopFrequency": 663,
"level": 0
},
{
"name": "correctable-cer",
"impaired": false,
"startFrequency": 663,
"stopFrequency": 663,
"level": 0
},
{
"name": "uncorrectable-cer",
"impaired": false,
"startFrequency": 663,
"stopFrequency": 663,
"level": 0
},
{
"name": "docsis-snr",
"impaired": false,
"startFrequency": 675,
"stopFrequency": 675,
"level": 39.9
},
{
"name": "docsis-level",
"impaired": false,
"startFrequency": 615,
"stopFrequency": 615,
"level": 6.9
},
{
"name": "ofdm-mer-mean",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 40.07
},
{
"name": "ofdm-mer-sd",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 0.58
},
{
"name": "ofdm-amp-mean",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": -0.03
},
{
"name": "ofdm-amp-rms",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 0.39
},
{
"name": "ofdm-amp-slope",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 0.002
},
{
"name": "ofdm-amp-pk-pk",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 2.06
},
{
"name": "ofdm-gd-mean",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 1882
},
{
"name": "ofdm-gd-rms",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 9.14
},
{
"name": "ofdm-gd-slope",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 0.032
},
{
"name": "ofdm-gd-pk-pk",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 62.88
},
{
"name": "ofdm-plc-cwer",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 0
},
{
"name": "ofdm-ncp-fail",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 0
}
],
"ofdmData": {
"numChannels": 1,
"numProfiles": 4
}
},
{
"mac": "A0:04:60:FC:8F:90",
"timestamp": "2019-05-06T05:05:34Z",
"impairments": [
{
"name": "channel-snr",
"impaired": false,
"startFrequency": 669,
"stopFrequency": 669,
"level": 0
},
{
"name": "channel-level",
"impaired": false,
"startFrequency": 669,
"stopFrequency": 669,
"level": 0
},
{
"name": "channel-tilt",
"impaired": false,
"startFrequency": 669,
"stopFrequency": 669,
"level": 0
},
{
"name": "channel-icfr",
"impaired": false,
"startFrequency": 669,
"stopFrequency": 669,
"level": 0
},
{
"name": "channel-guard-band",
"impaired": false,
"startFrequency": 669,
"stopFrequency": 669,
"level": 0
},
{
"name": "correctable-cer",
"impaired": false,
"startFrequency": 669,
"stopFrequency": 669,
"level": 0
},
{
"name": "uncorrectable-cer",
"impaired": false,
"startFrequency": 669,
"stopFrequency": 669,
"level": 0
},
{
"name": "docsis-snr",
"impaired": false,
"startFrequency": 645,
"stopFrequency": 645,
"level": 39.3
},
{
"name": "docsis-level",
"impaired": false,
"startFrequency": 609,
"stopFrequency": 609,
"level": 12.4
},
{
"name": "ofdm-mer-mean",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 39.84
},
{
"name": "ofdm-mer-sd",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 0.58
},
{
"name": "ofdm-amp-mean",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": -0.03
},
{
"name": "ofdm-amp-rms",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 0.42
},
{
"name": "ofdm-amp-slope",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 0.011
},
{
"name": "ofdm-amp-pk-pk",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 2.37
},
{
"name": "ofdm-gd-mean",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 1807
},
{
"name": "ofdm-gd-rms",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 9.49
},
{
"name": "ofdm-gd-slope",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 0.027
},
{
"name": "ofdm-gd-pk-pk",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 65.65
},
{
"name": "ofdm-plc-cwer",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 0
},
{
"name": "ofdm-ncp-fail",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 0
}
],
"ofdmData": {
"numChannels": 1,
"numProfiles": 4
}
},
{
"mac": "B0:DA:F9:11:CD:25",
"timestamp": "2019-05-06T05:05:34Z",
"impairments": [
{
"name": "channel-snr",
"impaired": false,
"startFrequency": 663,
"stopFrequency": 663,
"level": 0
},
{
"name": "channel-level",
"impaired": false,
"startFrequency": 663,
"stopFrequency": 663,
"level": 0
},
{
"name": "channel-tilt",
"impaired": false,
"startFrequency": 663,
"stopFrequency": 663,
"level": 0
},
{
"name": "channel-icfr",
"impaired": false,
"startFrequency": 663,
"stopFrequency": 663,
"level": 0
},
{
"name": "channel-guard-band",
"impaired": false,
"startFrequency": 663,
"stopFrequency": 663,
"level": 0
},
{
"name": "correctable-cer",
"impaired": false,
"startFrequency": 663,
"stopFrequency": 663,
"level": 0
},
{
"name": "uncorrectable-cer",
"impaired": false,
"startFrequency": 663,
"stopFrequency": 663,
"level": 0
},
{
"name": "docsis-snr",
"impaired": false,
"startFrequency": 645,
"stopFrequency": 645,
"level": 37.9
},
{
"name": "docsis-level",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": -11.1
},
{
"name": "ofdm-mer-mean",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 37.58
},
{
"name": "ofdm-mer-sd",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 0.63
},
{
"name": "ofdm-amp-mean",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": -0.03
},
{
"name": "ofdm-amp-rms",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 0.49
},
{
"name": "ofdm-amp-slope",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": -0.013
},
{
"name": "ofdm-amp-pk-pk",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 3.21
},
{
"name": "ofdm-gd-mean",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 1839
},
{
"name": "ofdm-gd-rms",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 17.59
},
{
"name": "ofdm-gd-slope",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 0.027
},
{
"name": "ofdm-gd-pk-pk",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 95.32
},
{
"name": "ofdm-plc-cwer",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 0
},
{
"name": "ofdm-ncp-fail",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 0
}
],
"ofdmData": {
"numChannels": 1,
"numProfiles": 4
}
},
{
"mac": "D4:0A:A9:00:00:F1",
"timestamp": "2019-05-06T05:05:34Z",
"impairments": [
{
"name": "channel-snr",
"impaired": false,
"startFrequency": 621,
"stopFrequency": 621,
"level": 0
},
{
"name": "channel-level",
"impaired": false,
"startFrequency": 621,
"stopFrequency": 621,
"level": 0
},
{
"name": "channel-tilt",
"impaired": false,
"startFrequency": 621,
"stopFrequency": 621,
"level": 0
},
{
"name": "channel-icfr",
"impaired": false,
"startFrequency": 621,
"stopFrequency": 621,
"level": 0
},
{
"name": "channel-guard-band",
"impaired": false,
"startFrequency": 621,
"stopFrequency": 621,
"level": 0
},
{
"name": "correctable-cer",
"impaired": false,
"startFrequency": 621,
"stopFrequency": 621,
"level": 0
},
{
"name": "uncorrectable-cer",
"impaired": false,
"startFrequency": 621,
"stopFrequency": 621,
"level": 0
},
{
"name": "docsis-snr",
"impaired": false,
"startFrequency": 639,
"stopFrequency": 639,
"level": 37.3
},
{
"name": "docsis-level",
"impaired": false,
"startFrequency": 615,
"stopFrequency": 615,
"level": 11.6
}
],
"ofdmData": {
"numChannels": 0,
"numProfiles": 0
}
},
{
"mac": "B0:39:56:4B:B1:F8",
"timestamp": "2019-05-06T05:05:34Z",
"impairments": [
{
"name": "channel-snr",
"impaired": false,
"startFrequency": 669,
"stopFrequency": 669,
"level": 0
},
{
"name": "channel-level",
"impaired": false,
"startFrequency": 669,
"stopFrequency": 669,
"level": 0
},
{
"name": "channel-tilt",
"impaired": false,
"startFrequency": 669,
"stopFrequency": 669,
"level": 0
},
{
"name": "channel-icfr",
"impaired": false,
"startFrequency": 669,
"stopFrequency": 669,
"level": 0
},
{
"name": "channel-guard-band",
"impaired": false,
"startFrequency": 669,
"stopFrequency": 669,
"level": 0
},
{
"name": "correctable-cer",
"impaired": false,
"startFrequency": 669,
"stopFrequency": 669,
"level": 0
},
{
"name": "uncorrectable-cer",
"impaired": false,
"startFrequency": 669,
"stopFrequency": 669,
"level": 0
},
{
"name": "docsis-snr",
"impaired": false,
"startFrequency": 675,
"stopFrequency": 675,
"level": 39.4
},
{
"name": "docsis-level",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 4.4
},
{
"name": "ofdm-mer-mean",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 39.44
},
{
"name": "ofdm-mer-sd",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 0.61
},
{
"name": "ofdm-amp-mean",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": -0.13
},
{
"name": "ofdm-amp-rms",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 0.72
},
{
"name": "ofdm-amp-slope",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 0.004
},
{
"name": "ofdm-amp-pk-pk",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 3.42
},
{
"name": "ofdm-gd-mean",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 1851
},
{
"name": "ofdm-gd-rms",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 8.59
},
{
"name": "ofdm-gd-slope",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 0.026
},
{
"name": "ofdm-gd-pk-pk",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 58.58
},
{
"name": "ofdm-plc-cwer",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 0
},
{
"name": "ofdm-ncp-fail",
"impaired": false,
"startFrequency": 811,
"stopFrequency": 904.95,
"level": 0
}
],
"ofdmData": {
"numChannels": 1,
"numProfiles": 4
}
}
]
文档数= x数的mac数
答案 0 :(得分：0)
让我为您提供基于JSON步行路径Unix工具的解决方案： jtc -在此处将查询逻辑“编码”到路径中。
1。您的JSON格式有误（您可以使用jtc -d在发布的JSON中查看问题所在）
2。修复JSON后，此cli将计算impairments包含记录"name": "docsis-level"的所有MAC：
bash $ <file.json jtc -w'<mac>l:[-1] [impairments][name]:<docsis-level>' -r | wc -l
8
bash $
步行路径（-w）的说明：
<mac>l:[-1]-查找每个带有标签mac的记录，并从找到的条目中以JSON的方式升级第1步[impairments][name]:<docsis-level>-地址记录impairments，并在其中找到记录"name": "docsis-level" wc -l将计算收集的（成功的）步行路程
PS>披露：我是jtc工具的创建者
答案 1 :(得分：0)
我将您的json文件上传到了“ http://www.json-generator.com/api/json/get/cggsimUEBK?indent=2”，下面的代码应为您计数。只需在开发控制台中运行它即可。
function findCount(){
var result = json.responseJSON;
var count=0;
result.forEach(function(item){
var impairments = item.impairments;
impairments.forEach(function(impairment){
if((impairment['name'] == "docsis-level")){ count++;}
});
});
console.log(count);
alert(count);
}
var json = $.getJSON("http://www.json-generator.com/api/json/get/cggsimUEBK?indent=2",findCount);
答案 2 :(得分：0)
在jq中进行计数的最简单方法是为此使用函数：
def count(stream): reduce stream as $i (0; .+1);
此定义还支持在时间和空间方面均有效的解决方案。
由于问题中的JSON格式错误，我将提出两种解决方案-一种基于具有“受损”键的对象：
count(.. | objects | select( has("impaired") and .name == "docsis-level"))
和另一个基于“障碍”数组的
count(.. | .impairments? // empty | .[] | select( .name? == "docsis-level"))
这两个查询说明了实现不同程度的鲁棒性的不同样式，但都与相关对象在输入中的位置无关。
现在示例数据已被修改，可以提供以下取决于常规结构的解决方案：
count(.[] | .impairments[] | select( .name == "docsis-level"))