javascript - Knockout: Make observable object from array -

i have thought simple question solve... apparently not.

i have server returns list of objects (json) loads database. database, objects have id attribute unique:

{     "stores": [         {             "id": "1f0",             "name": "foo",             "address": "foo here street"         },         {             "id": "2b4",             "name": "bar",             "address": "bar here street"         },         {             "id": "3b4",             "name": "baz",             "address": "baz here street"         }     ] } 

the idea pretty simple: want create observable (i'm guessing want observablearray) instead of array want object attributes id attribute , value whole store object:

{     "1f0": {             "id": "1f0",             "name": "foo",             "address": "foo here street"          },     "2b4": {             "id": "2b4",             "name": "bar",             "address": "bar here street"          },     "3b4": {              "id": "3b4",              "name": "baz",              "address": "baz here street"          } } 

i don't need of fields (id, name or address) observables (so don't think need mapping, right?). want know how create structure.

i've tried:

var self = this; self.stores = ko.observablearray(); [ . . . ] self.stores = ko.utils.arraymap(                                 serverstores,                                 function(store){                                     var retval = {};                                     retval[store['_id']] = store;                                     return retval;                                 }); 

but makes self.stores of 3 objects this:

[     {         "1f0": {             "id": "1f0",             "name": "foo",             "address": "foo here street"          },     },     {        "2b4": {             "id": "2b4",             "name": "bar",             "address": "bar here street"        },     },     {        "3b4": {            "id": "3b4",            "name": "baz",            "address": "baz here street"        }     } ] 

which not want.

any appreciated. thank in advance.

you wouldn't want map it, returns new array. 1 option loop through array , build object like:

var serversasobject = {}; ko.utils.arrayforeach(serverstores, function(store) {     var id = store.id;      if (id) {          serversasobject[id] = store;     } });  self.stores = ko.observable(serversasobject);