Storing a Key Value Array into a compact JSON string

Question

I want to store an array of key value items  a common way to do this could be something like      the JSON data may store several data types  not just key value lists     but  must be able to identify some data as a key value list     -- gt  more  common  way to store a key value array             key    slide0001 html    value    Looking Ahead          key    slide0008 html    value    Forecast          key    slide0021 html    value    Summary           another THOUSANDS KEY VALUE PAIRS                    otherdata       one    1    two    2    three    3        But  when there is many pairs   items  the string length becomes prohibited  and I want a compact way  this could be an example      -- gt   1  a  compact  way to store a key value array                   slide0001 html    Looking Ahead            slide0008 html    Forecast            slide0021 html    Summary             another THOUSANDS KEY VALUE PAIRS                      otherdata       one    1    two    2    three    3        Additionally  I want a way to identify the data as a keyvalue array  because  I may want to store other data in the same JSON file  I have these examples      -- gt   2  a  compact  way to store a key value array            keyvaluelist                 slide0001 html    Looking Ahead            slide0008 html    Forecast            slide0021 html    Summary             another THOUSANDS KEY VALUE PAIRS                          otherdata       one    1    two    2    three    3          -- gt   3  a  compact  way to store a key value array            mylist                type    keyvaluearray      data                   slide0001 html    Looking Ahead              slide0008 html    Forecast              slide0021 html    Summary                           another THOUSANDS KEY VALUE PAIRS                                              otherdata       one    1    two    2    three    3        What do you thing  which one do you suggest  do you have another way   Thanks   UPDATE 1  Remove invalid code  Javascript    JSON  UPDATE 2  Add non key value data  UPDATE 3  Replace     and     for     and     in each key value pair

User · Answer

For use key value pair in json use an object and don t use array  Find name value in array is hard but in object is easy  Ex    x000D   x000D  var exObj     x000D     mainData     x000D       slide0001 html    Looking Ahead   x000D       slide0008 html    Forecast   x000D       slide0021 html    Summary   x000D         another THOUSANDS KEY VALUE PAIRS x000D             x000D       x000D     otherdata       one    1    two    2    three    3    x000D     x000D  var mainData   exObj mainData  x000D     for use  x000D  Object keys mainData  forEach function n i   x000D    var v   mainData n   x000D    console log  name    i          n      value    i          v   x000D      x000D   x000D     and string length is minimum x000D  console log JSON stringify exObj    x000D  console log JSON stringify exObj  length   x000D   x000D   x000D

User · Answer

So why don t you simply use a key-value literal   var params          slide0001 html    Looking Ahead        slide0002 html    Forecase               return params  slide0001 html       returns  Looking Ahead

User · Answer

If the logic parsing this knows that   key    slide0001 html    value    Looking Ahead   is a key value pair  then you could transform it in an array and hold a few constants specifying which index maps to which key   For example   var data     slide0001 html    Looking Ahead     var C KEY   0  var C VALUE   1   var value   data C VALUE     So  now  your data can be           slide0001 html    Looking Ahead          slide0008 html    Forecast          slide0021 html    Summary       If your parsing logic doesn t know ahead of time about the structure of the data  you can add some metadata to describe it  For example     meta    keys     key    value         data          slide0001 html    Looking Ahead          slide0008 html    Forecast          slide0021 html    Summary               which would then be handled by the parser

User · Answer

To me  this is the most  natural  way to structure such data in JSON  provided that all of the keys are strings          keyvaluelist              slide0001 html    Looking Ahead            slide0008 html    Forecast            slide0021 html    Summary              otherdata              one    1            two    2            three    3              anotherthing    thing1        onelastthing    thing2      I read this as   a JSON object with four elements     element 1 is a map of key value pairs named  keyvaluelist       element 2 is a map of key value pairs named  otherdata       element 3 is a string named  anotherthing       element 4 is a string named  onelastthing    The first element or second element could alternatively be described as objects themselves  of course  with three elements each

[json] Storing a Key Value Array into a compact JSON string

Examples related to json

Examples related to key-value