@hxui/angular/esm2020/lib/utils/linked-list.class.mjs

An Angular library based on the [HXUI design system](https://hxui.io).

export class LinkedList {
    constructor() {
        this.length = 0;
        this.asArray = [];
        // Array methods overriding END
    }
    getNode(position) {
        if (this.length === 0 || position < 0 || position >= this.length) {
            throw new Error('Position is out of the list');
        }
        let current = this.head;
        for (let index = 0; index < position; index++) {
            current = current.next;
        }
        return current;
    }
    createInternalArrayRepresentation() {
        const outArray = [];
        let current = this.head;
        while (current) {
            outArray.push(current.value);
            current = current.next;
        }
        this.asArray = outArray;
    }
    get(position) {
        if (this.length === 0 || position < 0 || position >= this.length) {
            return void 0;
        }
        let current = this.head;
        for (let index = 0; index < position; index++) {
            current = current.next;
        }
        return current.value;
    }
    add(value, position = this.length) {
        if (position < 0 || position > this.length) {
            throw new Error('Position is out of the list');
        }
        const node = {
            value: value,
            next: undefined,
            previous: undefined
        };
        if (this.length === 0) {
            this.head = node;
            this.tail = node;
            this.current = node;
        }
        else {
            if (position === 0) {
                // first node
                node.next = this.head;
                this.head.previous = node;
                this.head = node;
            }
            else if (position === this.length) {
                // last node
                this.tail.next = node;
                node.previous = this.tail;
                this.tail = node;
            }
            else {
                // node in middle
                const currentPreviousNode = this.getNode(position - 1);
                const currentNextNode = currentPreviousNode.next;
                currentPreviousNode.next = node;
                currentNextNode.previous = node;
                node.previous = currentPreviousNode;
                node.next = currentNextNode;
            }
        }
        this.length++;
        this.createInternalArrayRepresentation();
    }
    remove(position = 0) {
        if (this.length === 0 || position < 0 || position >= this.length) {
            throw new Error('Position is out of the list');
        }
        if (position === 0) {
            // first node
            this.head = this.head.next;
            if (this.head) {
                // there is no second node
                this.head.previous = undefined;
            }
            else {
                // there is no second node
                this.tail = undefined;
            }
        }
        else if (position === this.length - 1) {
            // last node
            this.tail = this.tail.previous;
            this.tail.next = undefined;
        }
        else {
            // middle node
            const removedNode = this.getNode(position);
            removedNode.next.previous = removedNode.previous;
            removedNode.previous.next = removedNode.next;
        }
        this.length--;
        this.createInternalArrayRepresentation();
    }
    set(position, value) {
        if (this.length === 0 || position < 0 || position >= this.length) {
            throw new Error('Position is out of the list');
        }
        const node = this.getNode(position);
        node.value = value;
        this.createInternalArrayRepresentation();
    }
    toArray() {
        return this.asArray;
    }
    findAll(fn) {
        let current = this.head;
        const result = [];
        for (let index = 0; index < this.length; index++) {
            if (fn(current.value, index)) {
                result.push({ index, value: current.value });
            }
            current = current.next;
        }
        return result;
    }
    // Array methods overriding start
    push(...args) {
        args.forEach((arg) => {
            this.add(arg);
        });
        return this.length;
    }
    pop() {
        if (this.length === 0) {
            return undefined;
        }
        const last = this.tail;
        this.remove(this.length - 1);
        return last.value;
    }
    unshift(...args) {
        args.reverse();
        args.forEach((arg) => {
            this.add(arg, 0);
        });
        return this.length;
    }
    shift() {
        if (this.length === 0) {
            return undefined;
        }
        const lastItem = this.head.value;
        this.remove();
        return lastItem;
    }
    forEach(fn) {
        let current = this.head;
        for (let index = 0; index < this.length; index++) {
            fn(current.value, index);
            current = current.next;
        }
    }
    indexOf(value) {
        let current = this.head;
        let position = 0;
        for (let index = 0; index < this.length; index++) {
            if (current.value === value) {
                position = index;
                break;
            }
            current = current.next;
        }
        return position;
    }
    some(fn) {
        let current = this.head;
        let result = false;
        while (current && !result) {
            if (fn(current.value)) {
                result = true;
                break;
            }
            current = current.next;
        }
        return result;
    }
    every(fn) {
        let current = this.head;
        let result = true;
        while (current && result) {
            if (!fn(current.value)) {
                result = false;
            }
            current = current.next;
        }
        return result;
    }
    toString() {
        return '[Linked List]';
    }
    find(fn) {
        let current = this.head;
        let result;
        for (let index = 0; index < this.length; index++) {
            if (fn(current.value, index)) {
                result = current.value;
                break;
            }
            current = current.next;
        }
        return result;
    }
    findIndex(fn) {
        let current = this.head;
        let result;
        for (let index = 0; index < this.length; index++) {
            if (fn(current.value, index)) {
                result = index;
                break;
            }
            current = current.next;
        }
        return result;
    }
}
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class LinkedList <T> {\r\n\r\n  public length = 0;\r\n  protected head: any;\r\n  protected tail: any;\r\n  protected current: any;\r\n  protected asArray: T[] = [];\r\n\r\n  protected getNode(position: number): any {\r\n    if (this.length === 0 || position < 0 || position >= this.length) {\r\n      throw new Error('Position is out of the list');\r\n    }\r\n\r\n    let current = this.head;\r\n\r\n    for (let index = 0; index < position; index++) {\r\n      current = current.next;\r\n    }\r\n    return current;\r\n  }\r\n\r\n  protected createInternalArrayRepresentation(): void {\r\n    const outArray: any[] = [];\r\n    let current = this.head;\r\n\r\n    while (current) {\r\n      outArray.push(current.value);\r\n      current = current.next;\r\n    }\r\n    this.asArray = outArray;\r\n  }\r\n\r\n  public get(position: number): T {\r\n    if (this.length === 0 || position < 0 || position >= this.length) {\r\n      return void 0;\r\n    }\r\n\r\n    let current = this.head;\r\n\r\n    for (let index = 0; index < position; index++) {\r\n      current = current.next;\r\n    }\r\n    return current.value;\r\n  }\r\n\r\n  public add(value: T, position: number = this.length): void {\r\n    if (position < 0 || position > this.length) {\r\n      throw new Error('Position is out of the list');\r\n    }\r\n\r\n    const node = {\r\n      value: value as any,\r\n      next: undefined as any,\r\n      previous: undefined as any\r\n    };\r\n\r\n    if (this.length === 0) {\r\n      this.head = node;\r\n      this.tail = node;\r\n      this.current = node;\r\n    } else {\r\n      if (position === 0) {\r\n        // first node\r\n        node.next = this.head;\r\n        this.head.previous = node;\r\n        this.head = node;\r\n      } else if (position === this.length) {\r\n        // last node\r\n        this.tail.next = node;\r\n        node.previous = this.tail;\r\n        this.tail = node;\r\n      } else {\r\n        // node in middle\r\n        const currentPreviousNode = this.getNode(position - 1);\r\n        const currentNextNode = currentPreviousNode.next;\r\n\r\n        currentPreviousNode.next = node;\r\n        currentNextNode.previous = node;\r\n\r\n        node.previous = currentPreviousNode;\r\n        node.next = currentNextNode;\r\n      }\r\n\r\n    }\r\n    this.length++;\r\n    this.createInternalArrayRepresentation();\r\n  }\r\n\r\n  public remove(position: number = 0): void {\r\n    if (this.length === 0 || position < 0 || position >= this.length) {\r\n      throw new Error('Position is out of the list');\r\n    }\r\n\r\n    if (position === 0) {\r\n      // first node\r\n      this.head = this.head.next;\r\n\r\n      if (this.head) {\r\n        // there is no second node\r\n        this.head.previous = undefined;\r\n      } else {\r\n        // there is no second node\r\n        this.tail = undefined;\r\n      }\r\n    } else if (position === this.length - 1) {\r\n      // last node\r\n      this.tail = this.tail.previous;\r\n      this.tail.next = undefined;\r\n    } else {\r\n      // middle node\r\n      const removedNode = this.getNode(position);\r\n      removedNode.next.previous = removedNode.previous;\r\n      removedNode.previous.next = removedNode.next;\r\n    }\r\n\r\n    this.length--;\r\n    this.createInternalArrayRepresentation();\r\n  }\r\n\r\n  public set(position: number, value: T): void {\r\n    if (this.length === 0 || position < 0 || position >= this.length) {\r\n      throw new Error('Position is out of the list');\r\n    }\r\n\r\n    const node = this.getNode(position);\r\n    node.value = value;\r\n    this.createInternalArrayRepresentation();\r\n  }\r\n\r\n  public toArray(): T[] {\r\n    return this.asArray;\r\n  }\r\n\r\n  public findAll(fn: any): any[] {\r\n    let current = this.head;\r\n    const result: any[] = [];\r\n    for (let index = 0; index < this.length; index++) {\r\n      if (fn(current.value, index)) {\r\n        result.push({index, value: current.value});\r\n      }\r\n      current = current.next;\r\n    }\r\n    return result;\r\n  }\r\n  // Array methods overriding start\r\n  public push(...args: T[]): number {\r\n    args.forEach((arg: any) => {\r\n      this.add(arg);\r\n    });\r\n    return this.length;\r\n  }\r\n\r\n  public pop(): T {\r\n    if (this.length === 0) {\r\n      return undefined;\r\n    }\r\n    const last = this.tail;\r\n    this.remove(this.length - 1);\r\n    return last.value;\r\n  }\r\n\r\n  public unshift(...args: T[]): number {\r\n    args.reverse();\r\n    args.forEach((arg: any) => {\r\n      this.add(arg, 0);\r\n    });\r\n    return this.length;\r\n  }\r\n\r\n  public shift(): T {\r\n    if (this.length === 0) {\r\n      return undefined;\r\n    }\r\n    const lastItem = this.head.value;\r\n    this.remove();\r\n    return lastItem;\r\n  }\r\n\r\n  public forEach(fn: any): void {\r\n    let current = this.head;\r\n    for (let index = 0; index < this.length; index++) {\r\n      fn(current.value, index);\r\n      current = current.next;\r\n    }\r\n  }\r\n\r\n  public indexOf(value: T): number {\r\n    let current = this.head;\r\n    let position = 0;\r\n\r\n    for (let index = 0; index < this.length; index++) {\r\n      if (current.value === value) {\r\n\r\n        position = index;\r\n        break;\r\n      }\r\n      current = current.next;\r\n    }\r\n    return position;\r\n  }\r\n\r\n  public some(fn: any): boolean {\r\n    let current = this.head;\r\n    let result  = false;\r\n    while (current && !result) {\r\n      if (fn(current.value)) {\r\n        result = true;\r\n        break;\r\n      }\r\n      current = current.next;\r\n    }\r\n    return result;\r\n  }\r\n\r\n  public every(fn: any): boolean {\r\n    let current = this.head;\r\n    let result  = true;\r\n    while (current && result)  {\r\n      if (!fn(current.value)) {\r\n        result = false;\r\n      }\r\n      current = current.next;\r\n    }\r\n    return result;\r\n  }\r\n\r\n  public toString(): string {\r\n    return '[Linked List]';\r\n  }\r\n\r\n  public find(fn: any): T {\r\n    let current = this.head;\r\n    let result: T;\r\n    for (let index = 0; index < this.length; index++) {\r\n      if (fn(current.value, index)) {\r\n        result = current.value;\r\n        break;\r\n      }\r\n      current = current.next;\r\n    }\r\n    return result;\r\n  }\r\n\r\n  public findIndex(fn: any): number {\r\n    let current = this.head;\r\n    let result: number;\r\n    for (let index = 0; index < this.length; index++) {\r\n      if (fn(current.value, index)) {\r\n        result = index;\r\n        break;\r\n      }\r\n      current = current.next;\r\n    }\r\n    return result;\r\n  }\r\n\r\n  // Array methods overriding END\r\n}\r\n"]}