How to keep the sequence in javascript Map?

Question

i have myData map as below

 var myData =  new Object();

 myData[10427] = \"Description 10427\";
 myData[10504] = \"Description 10504\";
 myData[10419] = \"D         


        

Answer 1

ES6 Maps preserves the insertion order.

The set method is used for setting the key value pairs

var myData = new Map();
myData.set(10427, "Description 10427");
myData.set(10504, "Description 10504");
myData.set(10419, "Description 10419");

Map keys and values are printed using

myData.forEach((value,key) => console.log(key, value));

This will print the keys and values in the insertion order

Answer 2

Objects are unordered in JS. Use an array if order matters.

var myData = [];
myData.push({ "number": 10427, description: "Description 10427" });