javascript - 如何从对象中删除所有 null 和空字符串值？

您能告诉我如何从对象中删除所有 null 和空字符串值吗？删除 key 时出现错误。

这是我目前所拥有的，但它不能正常工作:

$.each(sjonObj, function(key, value) {
    if(value == "" || value == null) {
        delete sjonObj.key;
    }
});


var sjonObj= {
  "executionMode": "SEQUENTIAL",
  "coreTEEVersion": "3.3.1.4_RC8",
  "testSuiteId": "yyy",
  "testSuiteFormatVersion": "1.0.0.0",
  "testStatus": "IDLE",
  "reportPath": "",
  "startTime": 0,
  "durationBetweenTestCases": 20,
  "endTime": 0,
  "lastExecutedTestCaseId": 0,
  "repeatCount": 0,
  "retryCount": 0,
  "fixedTimeSyncSupported": false,
  "totalRepeatCount": 0,
  "totalRetryCount": 0,
  "summaryReportRequired": "true",
  "postConditionExecution": "ON_SUCCESS",
  "testCaseList": [
    {
      "executionMode": "SEQUENTIAL",
      "commandList": [
        
      ],
      "testCaseList": [
        
      ],
      "testStatus": "IDLE",
      "boundTimeDurationForExecution": 0,
      "startTime": 0,
      "endTime": 0,
      "label": null,
      "repeatCount": 0,
      "retryCount": 0,
      "totalRepeatCount": 0,
      "totalRetryCount": 0,
      "testCaseId": "a",
      "summaryReportRequired": "false",
      "postConditionExecution": "ON_SUCCESS"
    },
    {
      "executionMode": "SEQUENTIAL",
      "commandList": [
        
      ],
      "testCaseList": [
        {
          "executionMode": "SEQUENTIAL",
          "commandList": [
            {
              "commandParameters": {
                "serverAddress": "www.ggp.com",
                "echoRequestCount": "",
                "sendPacketSize": "",
                "interval": "",
                "ttl": "",
                "addFullDataInReport": "True",
                "maxRTT": "",
                "failOnTargetHostUnreachable": "True",
                "failOnTargetHostUnreachableCount": "",
                "initialDelay": "",
                "commandTimeout": "",
                "testDuration": ""
              },
              "commandName": "Ping",
              "testStatus": "IDLE",
              "label": "",
              "reportFileName": "tc_2-tc_1-cmd_1_Ping",
              "endTime": 0,
              "startTime": 0,
              "repeatCount": 0,
              "retryCount": 0,
              "totalRepeatCount": 0,
              "totalRetryCount": 0,
              "postConditionExecution": "ON_SUCCESS",
              "detailReportRequired": "true",
              "summaryReportRequired": "true"
            }
          ],
          "testCaseList": [
            
          ],
          "testStatus": "IDLE",
          "boundTimeDurationForExecution": 0,
          "startTime": 0,
          "endTime": 0,
          "label": null,
          "repeatCount": 0,
          "retryCount": 0,
          "totalRepeatCount": 0,
          "totalRetryCount": 0,
          "testCaseId": "dd",
          "summaryReportRequired": "false",
          "postConditionExecution": "ON_SUCCESS"
        }
      ],
      "testStatus": "IDLE",
      "boundTimeDurationForExecution": 0,
      "startTime": 0,
      "endTime": 0,
      "label": null,
      "repeatCount": 0,
      "retryCount": 0,
      "totalRepeatCount": 0,
      "totalRetryCount": 0,
      "testCaseId": "b",
      "summaryReportRequired": "false",
      "postConditionExecution": "ON_SUCCESS"
    }
  ]
};

$.each(sjonObj, function(key, value) {
    if(value == "" || value == null) {
        delete sjonObj.key;
    }
});

console.log(sjonObj);
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

最佳答案

从字面上看，您正在删除 sjonObj.key。您需要使用数组访问表示法:

delete sjonObj[key];

但是，这也会删除 value 等于 0 的地方，因为您没有使用严格比较。请改用 ===:

$.each(sjonObj, function(key, value){
    if (value === "" || value === null){
        delete sjonObj[key];
    }
});

但是，这只会浅浅地移动对象。要深入了解，可以使用递归:

(function filter(obj) {
    $.each(obj, function(key, value){
        if (value === "" || value === null){
            delete obj[key];
        } else if (Object.prototype.toString.call(value) === '[object Object]') {
            filter(value);
        } else if ($.isArray(value)) {
            $.each(value, function (k,v) { filter(v); });
        }
    });
})(sjonObj);


var sjonObj = {
  "executionMode": "SEQUENTIAL",
  "coreTEEVersion": "3.3.1.4_RC8",
  "testSuiteId": "yyy",
  "testSuiteFormatVersion": "1.0.0.0",
  "testStatus": "IDLE",
  "reportPath": "",
  "startTime": 0,
  "durationBetweenTestCases": 20,
  "endTime": 0,
  "lastExecutedTestCaseId": 0,
  "repeatCount": 0,
  "retryCount": 0,
  "fixedTimeSyncSupported": false,
  "totalRepeatCount": 0,
  "totalRetryCount": 0,
  "summaryReportRequired": "true",
  "postConditionExecution": "ON_SUCCESS",
  "testCaseList": [
    {
      "executionMode": "SEQUENTIAL",
      "commandList": [
        
      ],
      "testCaseList": [
        
      ],
      "testStatus": "IDLE",
      "boundTimeDurationForExecution": 0,
      "startTime": 0,
      "endTime": 0,
      "label": null,
      "repeatCount": 0,
      "retryCount": 0,
      "totalRepeatCount": 0,
      "totalRetryCount": 0,
      "testCaseId": "a",
      "summaryReportRequired": "false",
      "postConditionExecution": "ON_SUCCESS"
    },
    {
      "executionMode": "SEQUENTIAL",
      "commandList": [
        
      ],
      "testCaseList": [
        {
          "executionMode": "SEQUENTIAL",
          "commandList": [
            {
              "commandParameters": {
                "serverAddress": "www.ggp.com",
                "echoRequestCount": "",
                "sendPacketSize": "",
                "interval": "",
                "ttl": "",
                "addFullDataInReport": "True",
                "maxRTT": "",
                "failOnTargetHostUnreachable": "True",
                "failOnTargetHostUnreachableCount": "",
                "initialDelay": "",
                "commandTimeout": "",
                "testDuration": ""
              },
              "commandName": "Ping",
              "testStatus": "IDLE",
              "label": "",
              "reportFileName": "tc_2-tc_1-cmd_1_Ping",
              "endTime": 0,
              "startTime": 0,
              "repeatCount": 0,
              "retryCount": 0,
              "totalRepeatCount": 0,
              "totalRetryCount": 0,
              "postConditionExecution": "ON_SUCCESS",
              "detailReportRequired": "true",
              "summaryReportRequired": "true"
            }
          ],
          "testCaseList": [
            
          ],
          "testStatus": "IDLE",
          "boundTimeDurationForExecution": 0,
          "startTime": 0,
          "endTime": 0,
          "label": null,
          "repeatCount": 0,
          "retryCount": 0,
          "totalRepeatCount": 0,
          "totalRetryCount": 0,
          "testCaseId": "dd",
          "summaryReportRequired": "false",
          "postConditionExecution": "ON_SUCCESS"
        }
      ],
      "testStatus": "IDLE",
      "boundTimeDurationForExecution": 0,
      "startTime": 0,
      "endTime": 0,
      "label": null,
      "repeatCount": 0,
      "retryCount": 0,
      "totalRepeatCount": 0,
      "totalRetryCount": 0,
      "testCaseId": "b",
      "summaryReportRequired": "false",
      "postConditionExecution": "ON_SUCCESS"
    }
  ]
};

(function filter(obj) {
    $.each(obj, function(key, value){
        if (value === "" || value === null){
            delete obj[key];
        } else if (Object.prototype.toString.call(value) === '[object Object]') {
            filter(value);
        } else if (Array.isArray(value)) {
            value.forEach(function (el) { filter(el); });
        }
    });
})(sjonObj);

console.log(sjonObj)
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

请注意，如果您愿意使用 lodash/underscore.js 之类的库，则可以使用 _.pick 代替。但是，您仍然需要使用递归来进行深度过滤，因为这两个库都没有提供深度过滤功能。

sjonObj = (function filter(obj) {
    var filtered = _.pick(obj, function (v) { return v !== '' && v !== null; });
    return _.cloneDeep(filtered, function (v) { return v !== filtered && _.isPlainObject(v) ? filter(v) : undefined; });
})(sjonObj);

此变体具有不修改原始对象的额外优势，但它确实创建了一个全新的副本，如果您不需要原始对象，则效率会降低。

var sjonObj = {
  "executionMode": "SEQUENTIAL",
  "coreTEEVersion": "3.3.1.4_RC8",
  "testSuiteId": "yyy",
  "testSuiteFormatVersion": "1.0.0.0",
  "testStatus": "IDLE",
  "reportPath": "",
  "startTime": 0,
  "durationBetweenTestCases": 20,
  "endTime": 0,
  "lastExecutedTestCaseId": 0,
  "repeatCount": 0,
  "retryCount": 0,
  "fixedTimeSyncSupported": false,
  "totalRepeatCount": 0,
  "totalRetryCount": 0,
  "summaryReportRequired": "true",
  "postConditionExecution": "ON_SUCCESS",
  "testCaseList": [
    {
      "executionMode": "SEQUENTIAL",
      "commandList": [
        
      ],
      "testCaseList": [
        
      ],
      "testStatus": "IDLE",
      "boundTimeDurationForExecution": 0,
      "startTime": 0,
      "endTime": 0,
      "label": null,
      "repeatCount": 0,
      "retryCount": 0,
      "totalRepeatCount": 0,
      "totalRetryCount": 0,
      "testCaseId": "a",
      "summaryReportRequired": "false",
      "postConditionExecution": "ON_SUCCESS"
    },
    {
      "executionMode": "SEQUENTIAL",
      "commandList": [
        
      ],
      "testCaseList": [
        {
          "executionMode": "SEQUENTIAL",
          "commandList": [
            {
              "commandParameters": {
                "serverAddress": "www.ggp.com",
                "echoRequestCount": "",
                "sendPacketSize": "",
                "interval": "",
                "ttl": "",
                "addFullDataInReport": "True",
                "maxRTT": "",
                "failOnTargetHostUnreachable": "True",
                "failOnTargetHostUnreachableCount": "",
                "initialDelay": "",
                "commandTimeout": "",
                "testDuration": ""
              },
              "commandName": "Ping",
              "testStatus": "IDLE",
              "label": "",
              "reportFileName": "tc_2-tc_1-cmd_1_Ping",
              "endTime": 0,
              "startTime": 0,
              "repeatCount": 0,
              "retryCount": 0,
              "totalRepeatCount": 0,
              "totalRetryCount": 0,
              "postConditionExecution": "ON_SUCCESS",
              "detailReportRequired": "true",
              "summaryReportRequired": "true"
            }
          ],
          "testCaseList": [
            
          ],
          "testStatus": "IDLE",
          "boundTimeDurationForExecution": 0,
          "startTime": 0,
          "endTime": 0,
          "label": null,
          "repeatCount": 0,
          "retryCount": 0,
          "totalRepeatCount": 0,
          "totalRetryCount": 0,
          "testCaseId": "dd",
          "summaryReportRequired": "false",
          "postConditionExecution": "ON_SUCCESS"
        }
      ],
      "testStatus": "IDLE",
      "boundTimeDurationForExecution": 0,
      "startTime": 0,
      "endTime": 0,
      "label": null,
      "repeatCount": 0,
      "retryCount": 0,
      "totalRepeatCount": 0,
      "totalRetryCount": 0,
      "testCaseId": "b",
      "summaryReportRequired": "false",
      "postConditionExecution": "ON_SUCCESS"
    }
  ]
};

sjonObj = (function filter(obj) {
    var filtered = _.pick(obj, function (v) { return v !== '' && v !== null; });
    return _.cloneDeep(filtered, function (v) { return v !== filtered && _.isPlainObject(v) ? filter(v) : undefined; });
})(sjonObj);

console.log(sjonObj);
<script src="//cdnjs.cloudflare.com/ajax/libs/lodash.js/2.4.1/lodash.js"></script>

https://stackoverflow.com/questions/23774231/

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