javascript - sorting objects

Question

As shown in the figure, I want to perform reverse order based on "1", "99", and "23"; it becomes

NvTC

May I ask the master who knows? Thank you

Answer 1

In Object, data is stored in key => value pairs, so there is no order problem

Answer 2

  1 var obj = {
  2     '1':{
  3         val:'red'
  4      },
  5      '99':{
  6         val:'yellow'
  7      },
  8      '37':{
  9         val:'blue'
 10      }
 11 };
 12
 13 function selirizeData(obj){
 14     var keys = Object.keys(obj).sort(function(a,b){
 15         return a-b;
 16     });
 17     var newObj = {};
 18     keys.forEach(function(val){
 19         newObj[val] = obj[val];
 20     });
 21     console.log(keys);
 22     console.log(newObj);
 23 }
 24 selirizeData(obj);

First use Object.keys() to get the key array of the object, then use the array sorting method to sort, then use the array's foreach method to loop through the array, sort the original object's data and write it to the new object.

Answer 3

var obj = { /* ..略.. */ }

var res = Object.keys(obj).map(e => parseInt(e)).sort().map(e => obj[e]);

Answer 4

JS objects are unordered.
Also:
{

"11": "aaa"

}
The 11 inside is a string.

Answer 5

Thoughts:forin所有的key到Array，排序Array.sort(),遍历Array，按顺序取值obj[key]

    var keys = [];
    for (var i in obj) {
        keys.push(i);
    }
    keys.sort();
    for (var i = 0; i < keys.length; i++) {
        var key = keys[i];
        console.log(obj[key]);
    }