JavaScript Inner class in ES6 takes more memory?

Because you're creating and assigning the class to this.Element inside the constructor, and the constructor runs every time PriorityQueue is instantiated - yes, you are creating new Classes for every instance. If you only want one Class for all instantiations, put it on the prototype:

class PriorityQueue {
  constructor(maxSize) {
    // Set default max size if not provided
    if (isNaN(maxSize)) {
      maxSize = 10;
    }
    this.maxSize = maxSize;

    // Init an array that'll contain the queue values.
    this.container = [];
  }
}
PriorityQueue.prototype.Element = class {
  constructor(data, priority) {
    this.data = data;
    this.priority = priority;
  }
}

const p1 = new PriorityQueue(1);
const p2 = new PriorityQueue(2);
console.log(p1.Element === p2.Element);
Answer:1

Does the Element class gets created for each instance of the Priority Queue class?

Yes, kind of. It wont create a completely new class, just a closure for the class constructor function. The impact on memory will be really small, but maybe noticible when creating a few thousand priority queues.

Answer:2

I've come across this snippet and I have no idea why it does what it does. Try to answer the question yourself before looking at my answer below the code: what number will this alert? var foo = 1; ...

I've come across this snippet and I have no idea why it does what it does. Try to answer the question yourself before looking at my answer below the code: what number will this alert? var foo = 1; ...

How to get value from DB to the on-change event? Here is the example $("#widgetpanel").html(' >data="http://localhost:8080/guest?key='+$(this).val()+'item=??">'); I'm getting key from the drop-...

How to get value from DB to the on-change event? Here is the example $("#widgetpanel").html(' >data="http://localhost:8080/guest?key='+$(this).val()+'item=??">'); I'm getting key from the drop-...

  1. value change from
  2. value change dump
  3. value change management
  4. value chain analysis
  5. value change angular
  6. value change jquery
  7. value change listener java
  8. value change event

I have an array that I need to iterate through to get a value. someFunc: function(item) { var array = Ext.select(".item").elements; var elements; var itemId = item....

I have an array that I need to iterate through to get a value. someFunc: function(item) { var array = Ext.select(".item").elements; var elements; var itemId = item....

Like this : I hava a float number 25.56,I could translate it to the four hexadecimal number E1 7A CC 41 in js.And the translate way is called as union in C. But I don't know how to change the E1 7A ...

Like this : I hava a float number 25.56,I could translate it to the four hexadecimal number E1 7A CC 41 in js.And the translate way is called as union in C. But I don't know how to change the E1 7A ...