JSFiddle - React, Tailwind, and code Playground

JavaScript

var arr = [], i = 0;
for(i;i<10; i++) {
    arr["id"+i] = "somedata"+i;
}
var keys = Object.keys(arr);
for(i=5; i<10; i++) {
    var keyName = keys[i]; // "id1", "id2", etc.
    console.log(arr[keyName]); // "somedata"
}