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- export class Yallist {
- tail;
- head;
- length = 0;
- static create(list = []) {
- return new Yallist(list);
- }
- constructor(list = []) {
- for (const item of list) {
- this.push(item);
- }
- }
- *[Symbol.iterator]() {
- for (let walker = this.head; walker; walker = walker.next) {
- yield walker.value;
- }
- }
- removeNode(node) {
- if (node.list !== this) {
- throw new Error('removing node which does not belong to this list');
- }
- const next = node.next;
- const prev = node.prev;
- if (next) {
- next.prev = prev;
- }
- if (prev) {
- prev.next = next;
- }
- if (node === this.head) {
- this.head = next;
- }
- if (node === this.tail) {
- this.tail = prev;
- }
- this.length--;
- node.next = undefined;
- node.prev = undefined;
- node.list = undefined;
- return next;
- }
- unshiftNode(node) {
- if (node === this.head) {
- return;
- }
- if (node.list) {
- node.list.removeNode(node);
- }
- const head = this.head;
- node.list = this;
- node.next = head;
- if (head) {
- head.prev = node;
- }
- this.head = node;
- if (!this.tail) {
- this.tail = node;
- }
- this.length++;
- }
- pushNode(node) {
- if (node === this.tail) {
- return;
- }
- if (node.list) {
- node.list.removeNode(node);
- }
- const tail = this.tail;
- node.list = this;
- node.prev = tail;
- if (tail) {
- tail.next = node;
- }
- this.tail = node;
- if (!this.head) {
- this.head = node;
- }
- this.length++;
- }
- push(...args) {
- for (let i = 0, l = args.length; i < l; i++) {
- push(this, args[i]);
- }
- return this.length;
- }
- unshift(...args) {
- for (var i = 0, l = args.length; i < l; i++) {
- unshift(this, args[i]);
- }
- return this.length;
- }
- pop() {
- if (!this.tail) {
- return undefined;
- }
- const res = this.tail.value;
- const t = this.tail;
- this.tail = this.tail.prev;
- if (this.tail) {
- this.tail.next = undefined;
- }
- else {
- this.head = undefined;
- }
- t.list = undefined;
- this.length--;
- return res;
- }
- shift() {
- if (!this.head) {
- return undefined;
- }
- const res = this.head.value;
- const h = this.head;
- this.head = this.head.next;
- if (this.head) {
- this.head.prev = undefined;
- }
- else {
- this.tail = undefined;
- }
- h.list = undefined;
- this.length--;
- return res;
- }
- forEach(fn, thisp) {
- thisp = thisp || this;
- for (let walker = this.head, i = 0; !!walker; i++) {
- fn.call(thisp, walker.value, i, this);
- walker = walker.next;
- }
- }
- forEachReverse(fn, thisp) {
- thisp = thisp || this;
- for (let walker = this.tail, i = this.length - 1; !!walker; i--) {
- fn.call(thisp, walker.value, i, this);
- walker = walker.prev;
- }
- }
- get(n) {
- let i = 0;
- let walker = this.head;
- for (; !!walker && i < n; i++) {
- walker = walker.next;
- }
- if (i === n && !!walker) {
- return walker.value;
- }
- }
- getReverse(n) {
- let i = 0;
- let walker = this.tail;
- for (; !!walker && i < n; i++) {
- // abort out of the list early if we hit a cycle
- walker = walker.prev;
- }
- if (i === n && !!walker) {
- return walker.value;
- }
- }
- map(fn, thisp) {
- thisp = thisp || this;
- const res = new Yallist();
- for (let walker = this.head; !!walker;) {
- res.push(fn.call(thisp, walker.value, this));
- walker = walker.next;
- }
- return res;
- }
- mapReverse(fn, thisp) {
- thisp = thisp || this;
- var res = new Yallist();
- for (let walker = this.tail; !!walker;) {
- res.push(fn.call(thisp, walker.value, this));
- walker = walker.prev;
- }
- return res;
- }
- reduce(fn, initial) {
- let acc;
- let walker = this.head;
- if (arguments.length > 1) {
- acc = initial;
- }
- else if (this.head) {
- walker = this.head.next;
- acc = this.head.value;
- }
- else {
- throw new TypeError('Reduce of empty list with no initial value');
- }
- for (var i = 0; !!walker; i++) {
- acc = fn(acc, walker.value, i);
- walker = walker.next;
- }
- return acc;
- }
- reduceReverse(fn, initial) {
- let acc;
- let walker = this.tail;
- if (arguments.length > 1) {
- acc = initial;
- }
- else if (this.tail) {
- walker = this.tail.prev;
- acc = this.tail.value;
- }
- else {
- throw new TypeError('Reduce of empty list with no initial value');
- }
- for (let i = this.length - 1; !!walker; i--) {
- acc = fn(acc, walker.value, i);
- walker = walker.prev;
- }
- return acc;
- }
- toArray() {
- const arr = new Array(this.length);
- for (let i = 0, walker = this.head; !!walker; i++) {
- arr[i] = walker.value;
- walker = walker.next;
- }
- return arr;
- }
- toArrayReverse() {
- const arr = new Array(this.length);
- for (let i = 0, walker = this.tail; !!walker; i++) {
- arr[i] = walker.value;
- walker = walker.prev;
- }
- return arr;
- }
- slice(from = 0, to = this.length) {
- if (to < 0) {
- to += this.length;
- }
- if (from < 0) {
- from += this.length;
- }
- const ret = new Yallist();
- if (to < from || to < 0) {
- return ret;
- }
- if (from < 0) {
- from = 0;
- }
- if (to > this.length) {
- to = this.length;
- }
- let walker = this.head;
- let i = 0;
- for (i = 0; !!walker && i < from; i++) {
- walker = walker.next;
- }
- for (; !!walker && i < to; i++, walker = walker.next) {
- ret.push(walker.value);
- }
- return ret;
- }
- sliceReverse(from = 0, to = this.length) {
- if (to < 0) {
- to += this.length;
- }
- if (from < 0) {
- from += this.length;
- }
- const ret = new Yallist();
- if (to < from || to < 0) {
- return ret;
- }
- if (from < 0) {
- from = 0;
- }
- if (to > this.length) {
- to = this.length;
- }
- let i = this.length;
- let walker = this.tail;
- for (; !!walker && i > to; i--) {
- walker = walker.prev;
- }
- for (; !!walker && i > from; i--, walker = walker.prev) {
- ret.push(walker.value);
- }
- return ret;
- }
- splice(start, deleteCount = 0, ...nodes) {
- if (start > this.length) {
- start = this.length - 1;
- }
- if (start < 0) {
- start = this.length + start;
- }
- let walker = this.head;
- for (let i = 0; !!walker && i < start; i++) {
- walker = walker.next;
- }
- const ret = [];
- for (let i = 0; !!walker && i < deleteCount; i++) {
- ret.push(walker.value);
- walker = this.removeNode(walker);
- }
- if (!walker) {
- walker = this.tail;
- }
- else if (walker !== this.tail) {
- walker = walker.prev;
- }
- for (const v of nodes) {
- walker = insertAfter(this, walker, v);
- }
- return ret;
- }
- reverse() {
- const head = this.head;
- const tail = this.tail;
- for (let walker = head; !!walker; walker = walker.prev) {
- const p = walker.prev;
- walker.prev = walker.next;
- walker.next = p;
- }
- this.head = tail;
- this.tail = head;
- return this;
- }
- }
- // insertAfter undefined means "make the node the new head of list"
- function insertAfter(self, node, value) {
- const prev = node;
- const next = node ? node.next : self.head;
- const inserted = new Node(value, prev, next, self);
- if (inserted.next === undefined) {
- self.tail = inserted;
- }
- if (inserted.prev === undefined) {
- self.head = inserted;
- }
- self.length++;
- return inserted;
- }
- function push(self, item) {
- self.tail = new Node(item, self.tail, undefined, self);
- if (!self.head) {
- self.head = self.tail;
- }
- self.length++;
- }
- function unshift(self, item) {
- self.head = new Node(item, undefined, self.head, self);
- if (!self.tail) {
- self.tail = self.head;
- }
- self.length++;
- }
- export class Node {
- list;
- next;
- prev;
- value;
- constructor(value, prev, next, list) {
- this.list = list;
- this.value = value;
- if (prev) {
- prev.next = this;
- this.prev = prev;
- }
- else {
- this.prev = undefined;
- }
- if (next) {
- next.prev = this;
- this.next = next;
- }
- else {
- this.next = undefined;
- }
- }
- }
- //# sourceMappingURL=index.js.map
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