The ultimate guide to recursion interviews in JavaScript. Developed by FAANG engineers. Practice with real-world interview questions and get interview-ready in just a few hours.

If you’ve ever struggled with solving problems using recursion, or if you have to brush up your skills for an interview, this course is for you.

We'll start with the basics of what recursion is and why it’s important before diving into practicing solving actual questions. You’ll have access to detailed explanations and visualizations for each problem to help you along the way. 

By the time you have completed this course, you’ll be able to use all the concepts to solve complex real-world problems. We hope that through practicing recursion, you will be able to ace all recursion related questions in interviews at top tech companies.

Recursion for Coding Interviews in JavaScript

## Solution: Using Recursion

Let's have a look at the algorithm to solve this problem:
```javascript
function helperFunction(currentNode) {
  // mark currentNode visited
  for (each vertex v that has an edge from currentNode to v) {
    helperFunction(v);
  }
  // push currentNode to head of result
}

function topologicalSort(graph) {
  var result = []; // Empty stack that will contain the sorted vertices

  while there are unvisited vertices do {
    // select an unvisited vertex "currentNode"
    helperFunction(currentNode);
  }
  return(result)
}
```
The code will be as follows:

# Solution: Using Recursion

Let's have a look at the algorithm to solve this problem:
```javascript
function helperFunction(currentNode) {
  // mark currentNode visited
  for (each vertex v that has an edge from currentNode to v) {
    helperFunction(v);
  }
  // push currentNode to head of result
}

function topologicalSort(graph) {
  var result = []; // Empty stack that will contain the sorted vertices

  while there are unvisited vertices do {
    // select an unvisited vertex "currentNode"
    helperFunction(currentNode);
  }
  return(result)
}
```
The code will be as follows:

This review provides a detailed analysis of the solution to topologically sort a graph.

Recursion Fundamentals

Iteration Vs Recursion

Recursion with Numbers

Recursion with Strings

Recursion with Arrays

Recursion with Data Structures

Conclusion

Solution Review 3: Topological Sorting of a Graph

Solution: Using Recursion