262 lines
11 KiB
JavaScript
262 lines
11 KiB
JavaScript
var __generator = (this && this.__generator) || function (thisArg, body) {
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var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
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return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
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function verb(n) { return function (v) { return step([n, v]); }; }
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function step(op) {
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if (f) throw new TypeError("Generator is already executing.");
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while (_) try {
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if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
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if (y = 0, t) op = [op[0] & 2, t.value];
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switch (op[0]) {
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case 0: case 1: t = op; break;
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case 4: _.label++; return { value: op[1], done: false };
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case 5: _.label++; y = op[1]; op = [0]; continue;
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case 7: op = _.ops.pop(); _.trys.pop(); continue;
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default:
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if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
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if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
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if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
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if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
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if (t[2]) _.ops.pop();
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_.trys.pop(); continue;
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}
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op = body.call(thisArg, _);
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} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
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if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
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}
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};
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var __values = (this && this.__values) || function(o) {
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var s = typeof Symbol === "function" && Symbol.iterator, m = s && o[s], i = 0;
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if (m) return m.call(o);
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if (o && typeof o.length === "number") return {
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next: function () {
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if (o && i >= o.length) o = void 0;
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return { value: o && o[i++], done: !o };
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}
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};
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throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined.");
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};
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import Set from "../Set/Set";
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import LinkList from "../LinkList/LinkList";
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HashSet.initSize = (1 << 4);
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HashSet.maxSize = (1 << 30);
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HashSet.sigma = 0.75; // default load factor
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HashSet.treeifyThreshold = 8;
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HashSet.untreeifyThreshold = 6;
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HashSet.minTreeifySize = 64;
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/**
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* Note that resize is a time-consuming operation, please try to determine the number of buckets before use.
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* @param container Initialize the container
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* @param initBucketNum Initialize the bucket num
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* @param hashFunc Function to map elements to numbers
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* @constructor
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*/
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function HashSet(container, initBucketNum, hashFunc) {
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var _this = this;
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if (container === void 0) { container = []; }
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if (initBucketNum === void 0) { initBucketNum = HashSet.initSize; }
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hashFunc = hashFunc || (function (x) {
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var hashCode = 0;
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var str = '';
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if (typeof x === "number") {
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hashCode = Math.floor(x);
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hashCode = ((hashCode << 5) - hashCode);
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hashCode = hashCode & hashCode;
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}
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else {
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if (typeof x !== "string") {
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str = JSON.stringify(x);
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}
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else
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str = x;
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for (var i = 0; i < str.length; i++) {
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var character = str.charCodeAt(i);
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hashCode = ((hashCode << 5) - hashCode) + character;
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hashCode = hashCode & hashCode;
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}
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}
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hashCode ^= (hashCode >>> 16);
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return hashCode;
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});
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if ((initBucketNum & (initBucketNum - 1)) !== 0) {
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throw new Error("initBucketNum must be 2 to the power of n");
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}
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var len = 0;
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var hashTable = [];
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var bucketNum = Math.max(HashSet.initSize, Math.min(HashSet.maxSize, initBucketNum));
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this.size = function () {
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return len;
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};
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this.empty = function () {
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return len === 0;
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};
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this.clear = function () {
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len = 0;
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bucketNum = initBucketNum;
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hashTable = [];
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};
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this.forEach = function (callback) {
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var index = 0;
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hashTable.forEach(function (container) {
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container.forEach(function (element) {
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callback(element, index++);
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});
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});
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};
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var reAllocate = function (originalBucketNum) {
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if (originalBucketNum >= HashSet.maxSize)
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return;
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bucketNum = originalBucketNum * 2;
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var newHashTable = [];
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hashTable.forEach(function (container, index) {
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if (container.empty())
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return;
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if (container instanceof LinkList && container.size() === 1) {
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var element = container.front();
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if (element === undefined)
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throw new Error("unknown error");
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newHashTable[hashFunc(element) & (bucketNum - 1)] = new LinkList([element]);
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}
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else if (container instanceof Set) {
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var lowList_1 = new LinkList();
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var highList_1 = new LinkList();
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container.forEach(function (element) {
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var hashCode = hashFunc(element);
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if ((hashCode & originalBucketNum) === 0) {
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lowList_1.pushBack(element);
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}
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else
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highList_1.pushBack(element);
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});
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if (lowList_1.size() > HashSet.untreeifyThreshold)
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newHashTable[index] = new Set(lowList_1);
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else if (lowList_1.size())
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newHashTable[index] = lowList_1;
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if (highList_1.size() > HashSet.untreeifyThreshold)
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newHashTable[index + originalBucketNum] = new Set(highList_1);
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else if (highList_1.size())
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newHashTable[index + originalBucketNum] = highList_1;
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}
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else {
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var lowList_2 = new LinkList();
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var highList_2 = new LinkList();
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container.forEach(function (element) {
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var hashCode = hashFunc(element);
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if ((hashCode & originalBucketNum) === 0) {
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lowList_2.pushBack(element);
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}
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else
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highList_2.pushBack(element);
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});
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if (lowList_2.size())
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newHashTable[index] = lowList_2;
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if (highList_2.size())
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newHashTable[index + originalBucketNum] = highList_2;
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}
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hashTable[index].clear();
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});
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hashTable = newHashTable;
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};
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this.insert = function (element) {
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if (element === null || element === undefined) {
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throw new Error("to avoid some unnecessary errors, we don't suggest you insert null or undefined here");
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}
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var index = hashFunc(element) & (bucketNum - 1);
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if (!hashTable[index]) {
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hashTable[index] = new LinkList([element]);
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++len;
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}
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else {
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var preSize = hashTable[index].size();
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if (hashTable[index] instanceof LinkList) {
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if (hashTable[index].find(element))
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return;
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hashTable[index].pushBack(element);
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if (hashTable[index].size() >= HashSet.treeifyThreshold) {
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hashTable[index] = new Set(hashTable[index]);
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}
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}
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else
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hashTable[index].insert(element);
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var curSize = hashTable[index].size();
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len += curSize - preSize;
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}
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if (len > bucketNum * HashSet.sigma) {
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reAllocate.call(this, bucketNum);
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}
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};
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this.eraseElementByValue = function (element) {
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var index = hashFunc(element) & (bucketNum - 1);
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if (!hashTable[index])
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return;
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var preSize = hashTable[index].size();
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hashTable[index].eraseElementByValue(element);
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if (hashTable[index] instanceof Set) {
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if (hashTable[index].size() <= HashSet.untreeifyThreshold) {
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hashTable[index] = new LinkList(hashTable[index]);
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}
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}
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var curSize = hashTable[index].size();
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len += curSize - preSize;
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};
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this.find = function (element) {
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var index = hashFunc(element) & (bucketNum - 1);
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if (!hashTable[index])
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return false;
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return hashTable[index].find(element);
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};
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this[Symbol.iterator] = function () {
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return (function () {
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var index, _a, _b, element, e_1_1;
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var e_1, _c;
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return __generator(this, function (_d) {
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switch (_d.label) {
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case 0:
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index = 0;
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_d.label = 1;
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case 1:
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if (!(index < bucketNum)) return [3 /*break*/, 10];
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while (index < bucketNum && !hashTable[index])
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++index;
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if (index >= bucketNum)
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return [3 /*break*/, 10];
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_d.label = 2;
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case 2:
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_d.trys.push([2, 7, 8, 9]);
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_a = (e_1 = void 0, __values(hashTable[index])), _b = _a.next();
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_d.label = 3;
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case 3:
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if (!!_b.done) return [3 /*break*/, 6];
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element = _b.value;
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return [4 /*yield*/, element];
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case 4:
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_d.sent();
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_d.label = 5;
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case 5:
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_b = _a.next();
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return [3 /*break*/, 3];
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case 6: return [3 /*break*/, 9];
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case 7:
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e_1_1 = _d.sent();
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e_1 = { error: e_1_1 };
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return [3 /*break*/, 9];
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case 8:
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try {
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if (_b && !_b.done && (_c = _a.return)) _c.call(_a);
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}
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finally { if (e_1) throw e_1.error; }
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return [7 /*endfinally*/];
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case 9:
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++index;
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return [3 /*break*/, 1];
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case 10: return [2 /*return*/];
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}
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});
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})();
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};
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container.forEach(function (element) { return _this.insert(element); });
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Object.freeze(this);
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}
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Object.freeze(HashSet);
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export default HashSet;
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