Requires node version >= 14.x.
The linked-nodes package brings simple linked list/enumerable features to JavaScript.
There are several ways to create a linked node. Below details a few.
const LinkedNode = require("linked-nodes");
// Creates a node and gives it a value.
const childNode = new LinkedNode("child node value");
// Creates a node with a value and the next node.
const parentNode = new LinkedNode("parent node value", childNode);const LinkedNode = require("linked-nodes");
// Creates a node and gives it a value.
const parentNode = new LinkedNode("parent node value");
parentNode.next = new LinkedNode("next node value");const LinkedNode = require("linked-nodes");
// Creates a node
const parentNode = new LinkedNode();
parentNode.value = "some node value";next - write only
Used to assign the next LinkedNode in the link.
size - read only
Contains the number of nodes in the link.
value - read & write
Contains the value of the current node. Also sets the value of the current node.
LinkedNode.fromArray(myArray)
Creates a new linked node from the provided array.
const LinkedNode = require("linked-nodes");
const myArray = [1, 2, 3, 4, 5];
const lNodes = LinkedNode.fromArray(myArray);
console.log(lNodes.value); // Output: 1.
lNodes.moveNext();
console.log(lNodes.valye); // Ouput: 2.
// etc...LinkedNode.moveNext()
Advances the current LinkedNode.value to the next node, if applicable. Returns true if the current node's next property is not null, otherwise returns false.
const LinkedNode = require("linked-nodes");
const myArray = [1, 2, 3, 4, 5];
const lNodes = LinkedNode.fromArray(myArray);
do {
console.log(lNodes.value);
} while (lNodes.moveNext());
/*
Output:
1
2
3
4
5
*/LinkedNode.movePrevious()
Advances the current LinkedNode.value to the previous node, if applicable. Returns true if the current node's next property is not null, otherwise returns false.
const LinkedNode = require("linked-nodes");
const myArray = [1, 2, 3, 4, 5];
const lNodes = LinkedNode.fromArray(myArray);
// Move to the end of the linkedNodes
do {} while (lNodes.moveNext());
do {
console.log(lNodes.value);
} while (lNodes.movePrevious());
/*
Output:
5
4
3
2
1
*/LinkedNode.forEach((nodeValue) => {})
Iterates through each of nodes associated with the LinkedNode instance being used. This does not affect the current node or value. To change those, use moveNext() or movePrevious()
const LinkedNode = require("linked-nodes");
const myArray = [1, 2, 3, 4, 5];
const lNodes = LinkedNode.fromArray(myArray);
const outputArr = [];
lNodes.forEach((val) => {
ouputArr.push(val);
});
console.log(outputArr);
/*
Output:
[1, 2, 3, 4, 5]
*/LinkedNode.where((nodeValue) => condition)
Returns a linked node with next of all nodes meeting the provided condition.
const LinkedNode = require("linked-nodes");
const myArray = [1, 2, 3, 4, 5];
const lNodes = LinkedNode.fromArray(myArray);
const filteredNodes = lNodes.where((val) => val > 2);
console.log(outputArr.toArray());
/*
Output:
[3, 4, 5]
*/LinkedNode.toArray()
Converts the node to an array.
const LinkedNode = require("linked-nodes");
const myArray = [1, 2, 3, 4, 5];
const lNodes = LinkedNode.fromArray(myArray);
const nodesToArray = lNodes.toArray();
console.log(nodesToArray);
/*
Output:
[1, 2, 3, 4, 5]
*/LinkedNode.add(myValue)
Creates a new LinkedNode and adds it to the end of the link.
const LinkedNode = require("linked-nodes");
const myArray = [1, 2, 3, 4, 5];
const lNodes = LinkedNode.fromArray(myArray);
// Add a LinkedNode witht the value of 6.
lNodes.add(6);
console.log(lNodes.toArray());
/*
Output:
[1, 2, 3, 4, 5, 6]
*/