JSON response parsing in Javascript to get key value pair

Question

How can I get the name and value of each object in Javascript only

User · Answer

Ok  here is the JS code   var data   JSON parse    c    a    name   cable - black   value  2       for  var event in data        var dataCopy   data event       for  data in dataCopy            var mainData   dataCopy data           for  key in mainData                if  key match  name value                      alert  key       key       value       mainData key                                      FIDDLE HERE

User · Answer

Try the JSON Parser by Douglas Crockford at github  You can then simply create a JSON object out of your String variable as shown below   var JSONText      c    a     name   cable - black   value  2    name   case   value  2     o    v     name   over the ear headphones - white purple   value  1     l    e     name   lens cleaner   value  1     h    d     name   hdmi cable   value  1    name   hdtv essentials  hdtv cable setup    value  1    name   hd dvd  u0026 blue-ray disc lens cleaner   value  1      var JSONObject   JSON parse JSONText   var c   JSONObject  c    var o   JSONObject  o

User · Answer

There are two ways to access properties of objects   var obj    a   foo   b   bar     obj a   foo obj  b     bar   Or  if you need to dynamically do it   var key    b   obj key    bar   If you don t already have it as an object  you ll need to convert it   For a more complex example  let s assume you have an array of objects that represent users   var users     name   Corbin   age  20  favoriteFoods    ice cream    pizza                   name   John   age  25  favoriteFoods    ice cream    skittle        To access the age property of the second user  you would use users 1  age   To access the second  favoriteFood  of the first user  you d use users 0  favoriteFoods 2    Another example  obj 2  key 3   some key    That would access the 3rd element of an array named 2   Then  it would access  key  in that array  go to the third element of that  and then access the property name some key     As Amadan noted  it might be worth also discussing how to loop over different structures   To loop over an array  you can use a simple for loop   var arr     a    b    c        i  for  i   0  i  lt  arr length    i        console log arr i        To loop over an object is a bit more complicated   In the case that you re absolutely positive that the object is a plain object  you can use a plain for  x in obj      loop  but it s a lot safer to add in a hasOwnProperty check   This is necessary in situations where you cannot verify that the object does not have inherited properties    It also future proofs the code a bit    var user    name   Corbin   age  20  location   USA        key   for  key in user        if  user hasOwnProperty key             console log key           user key                   Note that I ve assumed whatever JS implementation you re using has console log   If not  you could use alert or some kind of DOM manipulation instead

User · Answer

var yourobj    c         a     name   cable - black   value  2    name   case   value  2           o         v     name   over the ear headphones - white purple   value  1       l         e     name   lens cleaner   value  1       h         d     name   hdmi cable   value  1              name   hdtv essentials  hdtv cable setup    value  1              name   hd dvd  u0026 blue-ray disc lens cleaner   value  1         first of all it s a good idea to get organized  top level reference must be a more convenient name other that a  v    etc in  o v o i e no need for the array    because it is one json entry   my solution  var obj       for n1 in yourjson      for n1 1 in yourjson n           for n1 2 in yourjson n  n1 1               obj n1 2 name     n1 2 value     Approved code  for n1 in yourobj       for n1 1 in yourobj n1        for n1 2 in yourobj n1  n1 1                for n1 3 in yourobj n1  n1 1  n1 2          obj yourobj n1  n1 1  n1 2  name  yourobj n1  n1 1  n1 2  value                           console log obj     result   You should use distinguish  accessorizes when using    method or dot notation

[javascript] JSON response parsing in Javascript to get key/value pair

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