js key value array

var myArray = {id1: 100, id2: 200, "tag with spaces": 300};
myArray.id3 = 400;
myArray["id4"] = 500;

for (var key in myArray) {
  console.log("key " + key + " has value " + myArray[key]);
}

<script>  
    // An array of keys 
    var keys = [5, 2, 3, 6, 10]; 
      
    // An array of values 
    var values = ["Geeks", "for", "Geeks", "Course", "Algorithm"]; 
      
    // Map created 
    var map = new Map(); 
      
    // Using loop to insert key 
    // value in map 
    for(var i = 0; i < keys.length; i++){ 
        map.set(keys[i], values[i]); 
    } 
      
    // Printing 
    for (var key of map.keys()) { 
        document.write(key + " => " + map.get(key) + "</br>") 
    } 
  
</script>                     

var categories = [
    {"1":"Category 1"},
    {"2":"Category 2"},
    {"3":"Category 3"},
    {"4":"Category 4"}
];