Iterating through the data of a JSON object using the for in loop

Using for in to iterate through the JSON object data, if the name in the data is a number, only valid for positive integer, then output the data as a positive integer, and the others will be output in the same order as defined in the original data.

• Test the data for JSON objects named numbers as follows:

var = {    "Json_obj_data": {' title ': ' All ', ' name ': ' All promotions ', ' ID ': ' All '},     "" ": {" title ":" Best_room_rate "," Name ":" Best hostel Rate "," id ":" best_room_rate "},    " ten ": {" title ":" Summer Rate "," name ":" Summer Rate "," id ":" + "}    
40,20,10 can be enclosed in double quotes, the output is the same as for (var in json_obj_data) {  alert (data ); // 10->20->40    }</script>

• Test the JSON object data with the name string, with the following code:

var json_data = {"3promotion": {"title": "All", "room_promotion_id": "All"},                             "2promotion": {" Title ":" Best_room_rate "," roompromotion_id ":" Best_room_rate "},                            " 1promotion ": {" title ":" Summer " Rate "," room_promotion_id ":" + "}                            ;              for (var in json_data) {          alert (Promotion);//output is in the order defined above}

• For JSON object data tests with names of numbers and strings, the code is as follows:

var json_data = {"3promotion": {"title": "All", "room_promotion_id": "All"},                             "2promotion": {" Title ":" Best_room_rate "," roompromotion_id ":" Best_room_rate "},                            " 1 ": {" title ":" Summer "," the " _promotion_id ":" "}                            };               for (var in json_data) {        alert (Promotion);//The data first outputs the name as a number and then outputs the name as a string in sequence}

There are two JSON object data tests with a number of names, and others as strings, with the following code:

var json_data = {"3promotion": {"title": "All", "room_promotion_id": "All"},                             "2promotion": {" Title ":" Best_room_rate "," roompromotion_id ":" Best_room_rate "},                            " 1 ": {" title ":" Summer "," the " _promotion_id ":" "},                            " 0 ": {" title ":" Expecial rate "," room_promotion_id ":" $ "}                            };              for (var in json_data) {      alert (Promotion);//Output is 0->1->3promotion-> 2promotion}

The JSON object data that has the name of a number, where there are negative numbers, is treated as a string, and the other is a string, the code is as follows:

 var  json_data = {"3promotion": {"title": "All", "room_promotion_id": "All" Span style= "color: #000000;" _},  "2promotion": {"title": "Best_room_rate", "roompromotion_id": "Best_room_rate" },  "1": {"title": "Summer", "room_promotion_id": "},  "0": {"title": "Expecial rate", "room_promotion_id": "},  "1": {"title": ' Demo3 ', ' room_promotion_id ': "Demo3" }             };  for  (var  promotion in   Json_data) {alert (promotion);//0->1->3promotion->2promotion- >-1}  

  includes numeric names that are less than 1, and names with negative numbers, and the code is tested as follows:

var json_data = {"3promotion": {"title": "All", "room_promotion_id": "All"},                             "2promotion": {" Title ":" Best_room_rate "," roompromotion_id ":" Best_room_rate "},                            " 1 ": {" title ":" Summer "," the " _promotion_id ":" "},                            " 0.25 ": {" title ":" Expecial rate "," room_promotion_id ":" $ "},                            " 1 " : {"title": ' Demo3 ', ' room_promotion_id ': "Demo3"}                            };              for (var in json_data) {    alert (promotion);//1->3promotion->2promotion->0.25- >-1
}