What is the best way to implement a Stack and a Queue in JavaScript?

I'm looking to do the shunting-yard algorithm and I'm going to need these data-structure

Let's learn something about two important data structure stack and queue:

1>Stack :- Stack is a sequential and ordered data structure and it is LIFO (Last In First Out) based data structure.

1>PUSH : Push operation is responsible for inserting data into a stack data structure.

2>POP: Pop operation is  for removing the data from a stack.

class Stack {
 constructor() {
   this.stack = [];
 }
 push(item) {
   this.stack.push(item);
 }
 pop() {
   this.stack.pop();
 }
}

1>Queue:- Queue is a sequential and ordered data structure and it is FIFO (First In First Out) based data structure.

enqueue—This operation is responsible for inserting or pushing a new element to the queue.

dequeue—This operation is responsible for removing the oldest element from the queue.

How do you implement a Stack and a Queue in JavaScript?

Let m, n be two distinct nodes in a tree T. Show that exactly one of the following four cases holds.
(a) m is to the left of n.
(b) m is a proper ancestor of n.
(c) m is to the right of n.
(d) m is a proper descendent of n.

I am not able to start it. It seems intuitive as per the structure of tree. There are many questions like this in my assignment. Any hints for these type of questions would be helpful.

How to prove these type of questions for Data Structures?

It has a conceptual question about tree data structure. Can we have some child data , then define some parents and assign them to selected child ones and build a tree data structure? 

Define child before parent in a tree data structure

I know for sure that stacks and queues can be implemented using a linked list but I was having my doubts if trees could also be implemented.

Which type of data structures can be implemented by a linked list?

Why does the sizeof operator return a size larger for a structure than the total sizes of the structure's members? 

Why isn't sizeof for a struct equal to the sum of sizeof of each member?

what is the least comparing times for sorting eight numbers in the Tournament sort algorithm?(considering the bad condition)?

The answer is 17 times. But I don't know how to get this answer.And I also want to know whether there is a generalized conclusion?

what is the least comparing times for sorting eight numbers in the Tournament sort algorithm?

Can I implement a binary heap by only using a TreeNode inferface (has children, or left/right, or/and parent.. something like this)?

I want to not rely on using array or linked list.

If I don't use array or linked list, I have a trouble inserting the next element in the correct place & keep it a complete binary tree (all non-leaf nodes are full). Also have trouble taking out the root and re-heapifying.

Is it possible to implement binary heap without using additional data structure (e.g. array, linked list)

I am trying to create a 2D stack (which i called s), but such that the number of columns in each row of s isn't the same, it changes in every rows. I just learned what stacks in C++ are (so a beginner) so any simple (or medium) level explanations are welcome. 

Variable length in a 2D stack

I was solving some problems on Binary tree and I got stuck in this question https://www.geeksforgeeks.org/sum-nodes-longest-path-root-leaf-node/ I am using python to solve the question I understood the logic of the solution given on the link but my question is how did the value of maxSum change in the SumOfLongRootToLeafPathUtil(root) function when nothing is returned from SumOfLongRootToLeafPath() function how is the original value of the varaible change please help ps:Please refer to the python code given in the link 

How is the value returned from the function SumOfLongRootToLeafPath

Array and stack both are Linear data structures then Why stack is implemented using another data structures but array is not? 

Why stack is implemented using another data structures but array is not?

I am looking to answer two questions in a definitive listing:

What are the underlying data systems used for Redis?

And what are the main blessings/negative aspects/use instances for each kind?

So, I've to study the Redis lists are applied with connected lists. However, for other types, I'm no longer capable of digging up any data. Additionally, if a person were to come upon this question and no longer have a high degree precis of the pros and cons of enhancing or getting access to specific statistics structures, they had had an entire list of when to quality use particular sorts to reference as well.

Mainly, I'm seeking to define every kind: string, list, set, zest and hash.

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openHow do you implement a Stack and a Queue in JavaScript?

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openHow to prove these type of questions for Data Structures?

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openDefine child before parent in a tree data structure

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openWhich type of data structures can be implemented by a linked list?

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openWhy isn't sizeof for a struct equal to the sum of sizeof of each member?

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openwhat is the least comparing times for sorting eight numbers in the Tournament sort algorithm?

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openIs it possible to implement binary heap without using additional data structure (e.g. array, linked list)

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openVariable length in a 2D stack

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openHow is the value returned from the function SumOfLongRootToLeafPath

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openWhy stack is implemented using another data structures but array is not?

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openWhat are the underlying data structures used for Redis?

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