Converting nested lists into arrays: A deep dive into Eloquent JavaScript's fourth chapter

Question

Converting nested lists into arrays: A deep dive into Eloquent JavaScript's fourth chapter

I'm stuck on this exercise and could really use some help to complete it. Can someone show me how to finish it and explain the solution? Thanks a lot!

There's a list value called "values" that needs to be converted into an array format like [1, 2, 3]

let list = {
  value: 1,
  rest: {
    value: 2,
    rest: {
      value: 3,
      rest: null
    }
  }
};

The provided hint suggests using a loop, but I'm still unsure about the next steps.

for (let node = list; node; node = node.rest) {
}

Your guidance is greatly appreciated! Thanks in advance!

javascript arrays function

Answer 1

Answer №1

Iterating through a linked list using a for loop in JavaScript can allow you to access each node's value and rest property. For example:
for (let node = list; node; node = node.rest) {
    console.log(node);
}
// Output: 
// { value: 1, rest: { value: 2, rest: { value: 3, rest: null } } }
// { value: 2, rest: { value: 3, rest: null } }
// { value: 3, rest: null }

If you want to gather all the values of the nodes into an array, you can do so by pushing them into an empty array like this:
let array = [];
for (let node = list; node; node = node.rest) {
    array.push(node.value);
}
console.log(array); // Output: [1, 2, 3]

Answer 2

Iterating through a linked list using a for loop in JavaScript can allow you to access each node's value and rest property. For example:
for (let node = list; node; node = node.rest) {
    console.log(node);
}
// Output: 
// { value: 1, rest: { value: 2, rest: { value: 3, rest: null } } }
// { value: 2, rest: { value: 3, rest: null } }
// { value: 3, rest: null }

If you want to gather all the values of the nodes into an array, you can do so by pushing them into an empty array like this:
let array = [];
for (let node = list; node; node = node.rest) {
    array.push(node.value);
}
console.log(array); // Output: [1, 2, 3]

Converting nested lists into arrays: A deep dive into Eloquent JavaScript's fourth chapter

Answer №1

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