How do I remove all null and empty string values from an object

Question

Can you please tell me how to remove all null and empty string values from an object  I am getting an error while deleting the key  This is what I have so far  but it doesn t work properly    each sjonObj  function key  value        if value     quot  quot     value    null            delete sjonObj key              x000D   x000D  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   x000D   lt script src  https   ajax googleapis com ajax libs jquery 2 1 1 jquery min js  gt  lt  script gt  x000D   x000D   x000D

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Note  this doen t sanitize arrays  import   isPlainObject   from  lodash    export const sanitize    obj        gt      if  isPlainObject obj         const sanitizedObj            for  const key in obj          if  obj key             sanitizedObj key    sanitize obj key                       return sanitizedObj      else       return obj          Test    describe  sanitize        gt        it  should keep an object if there are no empty fields        gt          expect sanitize      toEqual            expect sanitize   foo   bar      toEqual   foo   bar            expect sanitize   content    foo   bar        toEqual           content    foo   bar                            it  should remove empty fields from top level        gt          expect sanitize   foo      bar   baz      toEqual   bar   baz            expect sanitize   foo  null  bar   baz      toEqual   bar   baz            expect sanitize   foo  undefined  bar   baz      toEqual   bar   baz                   it  should remove nested empty fields        gt          expect sanitize   content    foo      bar   baz        toEqual           content    bar   baz                     expect sanitize   content    foo  null  bar   baz        toEqual           content    bar   baz                     expect sanitize   content    foo  undefined  bar   baz        toEqual           content    bar   baz

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Building upon suryaPavan s answer this slight modification can cleanup the empty object after removing the invidival emptys inside the object or array  this ensures that you don t have an empty array or object hanging around   function removeNullsInObject obj                if  typeof obj      string     obj                           return                              each obj  function key  value                   if  value           value     null                       delete obj key                     else if    isArray value                         if  value length     0                            delete obj key                           return                                              each value  function  k v                            removeNullsInObject v                                               if  value length     0                            delete obj key                                           else if  typeof value      object                         if  Object keys value  length     0                            delete obj key                           return                                            removeNullsInObject value                       if  Object keys value  length     0                            delete obj key

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According to Alexis King answer  here is a plain JavaScript version    x000D   x000D  function cleanUp obj    x000D      for  var attrKey in obj    x000D          var attrValue   obj attrKey   x000D          if  attrValue     null    attrValue           x000D              delete obj attrKey   x000D            else if  Object prototype toString call attrValue        object Object      x000D              cleanUp attrValue   x000D            else if  Array isArray attrValue     x000D              attrValue forEach function  arrayValue    x000D                  cleanUp arrayValue   x000D                  x000D            x000D        x000D    x000D   x000D   x000D

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You need to use the bracket notation because key is a variable holding the key as a value    each sjonObj  function key value         console log value       if value      value  null           delete sjonObj key                delete sjonObj key deletes the property called key from sjonObj  instead you need to use key as a variable holding the property name   Note  Still it will not handle the nested objects

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There is a very simple way to remove NULL values from JSON object  By default JSON object includes NULL values  Following can be used to remove NULL from JSON string  JsonConvert SerializeObject yourClassObject  new JsonSerializerSettings                                            NullValueHandling   NullValueHandling Ignore

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Enhancement to Alexis King s code to run without Jquery and removal of empty arrays and array of empty objects  With no properties  recursively   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                   sample1                    sample2                           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      for let key in obj       if  obj key            obj key      null           delete obj key         else if  Object prototype toString call obj key         object Object                  filter obj key          else if  Array isArray obj key              if obj key  length    0               delete obj key            else              for let  key in obj key                    filter obj key   key                              obj key    obj key  filter value   gt  Object keys value  length     0               if obj key  length    0                   delete obj key                                         filter sjonObj   console log JSON stringify sjonObj  null  3

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x000D   x000D  var data     x000D        name    bill    age   20    x000D        name    jhon    age   19    x000D        name    steve    age   16    x000D        name    larry    age   22    x000D     null  null  null x000D     x000D   x000D    eliminate all the null values from the data x000D  data   data filter function x    return x     null      x000D   x000D  console log  data      JSON stringify data    x000D   x000D   x000D

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Using some ES6   ES2015   If you don t like to create an extra function and remove the items  inline    Object keys obj  forEach k   gt    obj k   amp  amp  obj k      undefined   amp  amp  delete obj k      jsbin  Same  written as a function   const removeEmpty    obj    gt      Object keys obj  forEach  k    gt    obj k   amp  amp  obj k      undefined   amp  amp  delete obj k      return obj       jsbin  This function uses recursion to delete items from nested objects as well   const removeEmpty    obj    gt      Object keys obj  forEach k   gt       obj k   amp  amp  typeof obj k       object    amp  amp  removeEmpty obj k            obj k   amp  amp  obj k      undefined   amp  amp  delete obj k         return obj       jsbin  Same as function before but with ES7   2016 Object entries   const removeEmpty    obj    gt      Object entries obj  forEach   key  val      gt       val  amp  amp  typeof val      object    amp  amp  removeEmpty val          val     null    val          amp  amp  delete obj key         return obj       Same as third example but in plain ES5   function removeEmpty obj      Object keys obj  forEach function key         obj key   amp  amp  typeof obj key       object    amp  amp  removeEmpty obj key           obj key            obj key      null   amp  amp  delete obj key          return obj       jsbin

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x000D   x000D  const myObject       key1   Hello     key2  null    key3        key4  undefined    key5   World       const filteredObj   obj   gt      Object entries obj         filter      value     gt    value         reduce  acc   key  value     gt        acc   key   value                               console log filteredObj myObject    x000D   x000D   x000D

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function removeAllBlankOrNull JsonObj          each JsonObj  function key  value            if  value           value     null                delete JsonObj key             else if  typeof value       object                 JsonObj key    removeAllBlankOrNull value                         return JsonObj      Deletes all empty strings and null values recursively  Fiddle

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Here is the optimized code snippet to remove empty arrays objects as well   function removeNullsInObject obj        if  typeof obj      string     return          each obj  function key  value           if  value           value     null               delete obj key             else if    isArray value                 if  value length     0    delete obj key   return                  each value  function  k v                    removeNullsInObject v                             else if  typeof value      object                 if  Object keys value  length     0                     delete obj key   return                             removeNullsInObject value                           Thanks  Alexis king

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You re deleting sjonObj key  literally  You need to use array access notation   delete sjonObj key     However  that will also delete where value is equal to 0  since you re not using strict comparison  Use     instead     each sjonObj  function key  value       if  value           value     null           delete sjonObj key               However  this will only walk the object shallowly  To do it deeply  you can use recursion    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      x000D   x000D  var sjonObj     x000D     executionMode    SEQUENTIAL   x000D     coreTEEVersion    3 3 1 4 RC8   x000D     testSuiteId    yyy   x000D     testSuiteFormatVersion    1 0 0 0   x000D     testStatus    IDLE   x000D     reportPath       x000D     startTime   0  x000D     durationBetweenTestCases   20  x000D     endTime   0  x000D     lastExecutedTestCaseId   0  x000D     repeatCount   0  x000D     retryCount   0  x000D     fixedTimeSyncSupported   false  x000D     totalRepeatCount   0  x000D     totalRetryCount   0  x000D     summaryReportRequired    true   x000D     postConditionExecution    ON SUCCESS   x000D     testCaseList     x000D        x000D         executionMode    SEQUENTIAL   x000D         commandList     x000D           x000D           x000D         testCaseList     x000D           x000D           x000D         testStatus    IDLE   x000D         boundTimeDurationForExecution   0  x000D         startTime   0  x000D         endTime   0  x000D         label   null  x000D         repeatCount   0  x000D         retryCount   0  x000D         totalRepeatCount   0  x000D         totalRetryCount   0  x000D         testCaseId    a   x000D         summaryReportRequired    false   x000D         postConditionExecution    ON SUCCESS  x000D         x000D        x000D         executionMode    SEQUENTIAL   x000D         commandList     x000D           x000D           x000D         testCaseList     x000D            x000D             executionMode    SEQUENTIAL   x000D             commandList     x000D                x000D                 commandParameters     x000D                   serverAddress    www ggp com   x000D                   echoRequestCount       x000D                   sendPacketSize       x000D                   interval       x000D                   ttl       x000D                   addFullDataInReport    True   x000D                   maxRTT       x000D                   failOnTargetHostUnreachable    True   x000D                   failOnTargetHostUnreachableCount       x000D                   initialDelay       x000D                   commandTimeout       x000D                   testDuration      x000D                   x000D                 commandName    Ping   x000D                 testStatus    IDLE   x000D                 label       x000D                 reportFileName    tc 2-tc 1-cmd 1 Ping   x000D                 endTime   0  x000D                 startTime   0  x000D                 repeatCount   0  x000D                 retryCount   0  x000D                 totalRepeatCount   0  x000D                 totalRetryCount   0  x000D                 postConditionExecution    ON SUCCESS   x000D                 detailReportRequired    true   x000D                 summaryReportRequired    true  x000D                x000D               x000D             testCaseList     x000D               x000D               x000D             testStatus    IDLE   x000D             boundTimeDurationForExecution   0  x000D             startTime   0  x000D             endTime   0  x000D             label   null  x000D             repeatCount   0  x000D             retryCount   0  x000D             totalRepeatCount   0  x000D             totalRetryCount   0  x000D             testCaseId    dd   x000D             summaryReportRequired    false   x000D             postConditionExecution    ON SUCCESS  x000D            x000D           x000D         testStatus    IDLE   x000D         boundTimeDurationForExecution   0  x000D         startTime   0  x000D         endTime   0  x000D         label   null  x000D         repeatCount   0  x000D         retryCount   0  x000D         totalRepeatCount   0  x000D         totalRetryCount   0  x000D         testCaseId    b   x000D         summaryReportRequired    false   x000D         postConditionExecution    ON SUCCESS  x000D        x000D      x000D     x000D   x000D   function filter obj    x000D        each obj  function key  value   x000D          if  value           value     null   x000D              delete obj key   x000D            else if  Object prototype toString call value        object Object      x000D              filter value   x000D            else if  Array isArray value     x000D              value forEach function  el    filter el       x000D            x000D          x000D     sjonObj   x000D   x000D  console log sjonObj  x000D   lt script src  https   ajax googleapis com ajax libs jquery 2 1 1 jquery min js  gt  lt  script gt  x000D   x000D   x000D      Note that if you re willing to use a library like lodash underscore js  you can use   pick instead  However  you will still need to use recursion to filter deeply  since neither library provides a deep filter function   sjonObj    function filter obj        var filtered     pick obj  function  v    return v         amp  amp  v     null          return   cloneDeep filtered  function  v    return v     filtered  amp  amp    isPlainObject v    filter v    undefined         sjonObj     This variant has the added advantage of leaving the original object unmodified  but it does create an entirely new copy  which would be less efficient if you don t need the original object    x000D   x000D  var sjonObj     x000D     executionMode    SEQUENTIAL   x000D     coreTEEVersion    3 3 1 4 RC8   x000D     testSuiteId    yyy   x000D     testSuiteFormatVersion    1 0 0 0   x000D     testStatus    IDLE   x000D     reportPath       x000D     startTime   0  x000D     durationBetweenTestCases   20  x000D     endTime   0  x000D     lastExecutedTestCaseId   0  x000D     repeatCount   0  x000D     retryCount   0  x000D     fixedTimeSyncSupported   false  x000D     totalRepeatCount   0  x000D     totalRetryCount   0  x000D     summaryReportRequired    true   x000D     postConditionExecution    ON SUCCESS   x000D     testCaseList     x000D        x000D         executionMode    SEQUENTIAL   x000D         commandList     x000D           x000D           x000D         testCaseList     x000D           x000D           x000D         testStatus    IDLE   x000D         boundTimeDurationForExecution   0  x000D         startTime   0  x000D         endTime   0  x000D         label   null  x000D         repeatCount   0  x000D         retryCount   0  x000D         totalRepeatCount   0  x000D         totalRetryCount   0  x000D         testCaseId    a   x000D         summaryReportRequired    false   x000D         postConditionExecution    ON SUCCESS  x000D         x000D        x000D         executionMode    SEQUENTIAL   x000D         commandList     x000D           x000D           x000D         testCaseList     x000D            x000D             executionMode    SEQUENTIAL   x000D             commandList     x000D                x000D                 commandParameters     x000D                   serverAddress    www ggp com   x000D                   echoRequestCount       x000D                   sendPacketSize       x000D                   interval       x000D                   ttl       x000D                   addFullDataInReport    True   x000D                   maxRTT       x000D                   failOnTargetHostUnreachable    True   x000D                   failOnTargetHostUnreachableCount       x000D                   initialDelay       x000D                   commandTimeout       x000D                   testDuration      x000D                   x000D                 commandName    Ping   x000D                 testStatus    IDLE   x000D                 label       x000D                 reportFileName    tc 2-tc 1-cmd 1 Ping   x000D                 endTime   0  x000D                 startTime   0  x000D                 repeatCount   0  x000D                 retryCount   0  x000D                 totalRepeatCount   0  x000D                 totalRetryCount   0  x000D                 postConditionExecution    ON SUCCESS   x000D                 detailReportRequired    true   x000D                 summaryReportRequired    true  x000D                x000D               x000D             testCaseList     x000D               x000D               x000D             testStatus    IDLE   x000D             boundTimeDurationForExecution   0  x000D             startTime   0  x000D             endTime   0  x000D             label   null  x000D             repeatCount   0  x000D             retryCount   0  x000D             totalRepeatCount   0  x000D             totalRetryCount   0  x000D             testCaseId    dd   x000D             summaryReportRequired    false   x000D             postConditionExecution    ON SUCCESS  x000D            x000D           x000D         testStatus    IDLE   x000D         boundTimeDurationForExecution   0  x000D         startTime   0  x000D         endTime   0  x000D         label   null  x000D         repeatCount   0  x000D         retryCount   0  x000D         totalRepeatCount   0  x000D         totalRetryCount   0  x000D         testCaseId    b   x000D         summaryReportRequired    false   x000D         postConditionExecution    ON SUCCESS  x000D        x000D      x000D     x000D   x000D  sjonObj    function filter obj    x000D      var filtered     pick obj  function  v    return v         amp  amp  v     null      x000D      return   cloneDeep filtered  function  v    return v     filtered  amp  amp    isPlainObject v    filter v    undefined      x000D     sjonObj   x000D   x000D  console log sjonObj   x000D   lt script src    cdnjs cloudflare com ajax libs lodash js 2 4 1 lodash js  gt  lt  script gt  x000D   x000D   x000D

[javascript] How do I remove all null and empty string values from an object?

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