angularjs - JavaScript recursion find method -

i've following json:

"params": [             {               "name": "a",               "value": "tes",               "isattr": false,               "children": [                 {                   "name": "b",                   "value": "b",                   "isattr": false,                   "uid": "0.529892839025706",                   "parent_uid": "0.8096382778603584",                   "children": [],                   "expanded": true,                   "level": 2                 }               ],               "uid": "0.8096382778603584",               "expanded": true,               "level": 1             },             {               "name": "c",               "value": "c",               "isattr": false,               "children": [                 {                   "name": "d",                   "value": "d",                   "isattr": false,                   "children": [                     {                       "name": "e",                       "value": "e",                       "isattr": false,                       "children": [                         {                           "name": "f",                           "value": "f",                           "isattr": false,                           "uid": "0.5153285339474678",                           "parent_uid": "0.646890748757869",                           "children": [],                           "expanded": false,                           "level": 4                         }                       ],                       "uid": "0.646890748757869",                       "parent_uid": "0.2041493458673358",                       "expanded": false,                       "level": 3                     }                   ],                   "uid": "0.2041493458673358",                   "parent_uid": "0.9416675802785903",                   "expanded": true,                   "level": 2                 },                 {                   "name": "g",                   "value": "g",                   "isattr": false,                   "children": [                     {                       "name": "h",                       "value": "h",                       "isattr": false,                       "uid": "0.3920950344763696",                       "parent_uid": "0.6195112708956003",                       "children": [],                       "expanded": false,                       "level": 3                     }                   ],                   "uid": "0.6195112708956003",                   "parent_uid": "0.9416675802785903",                   "expanded": true,                   "level": 2                 },                 {                   "name": "i",                   "value": "i",                   "isattr": false,                   "children": [                     {                       "name": "j",                       "value": "j",                       "isattr": false,                       "children": [                         {                           "name": "k",                           "value": "k",                           "isattr": false,                           "children": [                             {                               "name": "l",                               "value": "l",                               "isattr": false,                               "uid": "0.009914681548252702",                               "parent_uid": "0.68887914926745",                               "children": [],                               "expanded": false,                               "level": 5                             }                           ],                           "uid": "0.68887914926745",                           "parent_uid": "0.8186752030160278",                           "expanded": false,                           "level": 4                         }                       ],                       "uid": "0.8186752030160278",                       "parent_uid": "0.8304482696112245",                       "expanded": false,                       "level": 3                     },                     {                       "name": "m",                       "value": "m",                       "isattr": false,                       "children": [                         {                           "name": "n",                           "value": "n",                           "isattr": false,                           "uid": "0.25650549842976034",                           "parent_uid": "0.14876524219289422",                           "children": [],                           "expanded": false,                           "level": 4                         }                       ],                       "uid": "0.14876524219289422",                       "parent_uid": "0.8304482696112245",                       "expanded": false,                       "level": 3                     }                   ],                   "uid": "0.8304482696112245",                   "parent_uid": "0.9416675802785903",                   "expanded": true,                   "level": 2                 }               ],               "uid": "0.9416675802785903",               "expanded": true,               "level": 1             }           ] 

i need method receive uid params , return the specific item in params him parent. did following, got null in found:

    var finditem = function(params, uid){         if (!params)             return null;          for(var = 0; < params.length; i++){             if(params[i].uid == uid)                 return params[i];             else{                  finditem(params[i].children, uid);             }         }          return null;     } 

example getting null: passing uid b

when examine children, should check if found something:

else {      var found = finditem(params[i].children, uid);     if (found !== null)         return found; }