From 95d3793c20f20834cd50d80842b1e69a680d07c3 Mon Sep 17 00:00:00 2001 From: Mike Smith <89040888+smiggiddy@users.noreply.github.com> Date: Thu, 1 Feb 2024 23:04:38 -0500 Subject: [PATCH] feat: new stuff --- csci/.eslintrc | 13 + csci/.prettierrc | 4 + csci/linkedList.js | 407 +++++++------ csci/package-lock.json | 1262 ++++++++++++++++++++++++++++++++++++++++ csci/package.json | 17 + csci/projectHashMap.js | 574 +++++++++--------- csci/projectHashSet.js | 116 ++++ 7 files changed, 1913 insertions(+), 480 deletions(-) create mode 100644 csci/.eslintrc create mode 100644 csci/.prettierrc create mode 100644 csci/package-lock.json create mode 100644 csci/package.json create mode 100644 csci/projectHashSet.js diff --git a/csci/.eslintrc b/csci/.eslintrc new file mode 100644 index 0000000..2eced79 --- /dev/null +++ b/csci/.eslintrc @@ -0,0 +1,13 @@ +module.exports = { + env: { + browser: true, + es2021: true, + node: true, + }, + extends: ["eslint:recommended", "prettier"], + parserOptions: { + ecmaVersion: "latest", + sourceType: "module", + }, +}; + diff --git a/csci/.prettierrc b/csci/.prettierrc new file mode 100644 index 0000000..86e9e7d --- /dev/null +++ b/csci/.prettierrc @@ -0,0 +1,4 @@ +{ + "tabWidth": 4, + "singleQuote": true +} diff --git a/csci/linkedList.js b/csci/linkedList.js index e1d1ab4..31834cb 100644 --- a/csci/linkedList.js +++ b/csci/linkedList.js @@ -1,215 +1,236 @@ class LinkedList { - constructor() { - this.size = 0; - this.tail = null; - this.head = null; - } - - - append(value) { - let newNode = new Node(value); - if (this.head == null) { - this.head = newNode; - } else { - const temp = this.head; - this.head = newNode; - this.head.nextNode = temp; - } - if (this.tail == null) { - this.tail = newNode; - + constructor() { + this.size = 0; + this.tail = null; + this.head = null; } - this.size += 1; - } - - prepend(value) { - let newNode = new Node(value); - - if (this.tail == null) { - this.tail = newNode; - if (this.head == null) { - this.head = newNode; - } - } else { - const temp = this.tail; - temp.nextNode = newNode; - this.tail = newNode; - + getHead() { + return this.tail; } - this.size += 1; - } - - at(index) { - function nodeAtIndex(index, count, node) { - if (index === count) { - return node; - } else if (node.nextNode == null) { - return null; - } else { - return nodeAtIndex(index, count + 1, node.nextNode); - } + getTail() { + return this.head; } - return nodeAtIndex(index, 0, this.head); - } - pop() { - if (this.head.nextNode == null) { - this.head = null; - this.tail = null; - } else { - this.head = this.head.nextNode; - - } - this.size -= 1; - } - - contains(value) { - function searchNodes(node, value) { - if (node.value === value) { - return true; - } else if (node.nextNode == null) { - return false; - } else { - return searchNodes(node.nextNode, value); - } + getSize() { + return this.size; } - return searchNodes(this.head, value); - - } - - find(value) { - let index = 0; - function searchNodes(node, value, index) { - if (node.value === value) { - return index; - } else if (node.nextNode == null) { - return null; - } else { - return searchNodes(node.nextNode, value, index + 1); - } - } - - return searchNodes(this.head, value, index); - - } - - insertAt(value, index) { - let previousNode = null; - let newNode = new Node(value); - let currentNode = this.head; - - let count = 0; - - if (index === 0) { - this.append(value); - return; - } - - while (currentNode != null) { - if (count == index) { - if (currentNode.nextNode == null) { - this.prepend(value); - return; + append(value) { + let newNode = new Node(value); + if (this.head == null) { + this.head = newNode; } else { - let nextNode = currentNode; - previousNode.nextNode = newNode; - newNode.nextNode = nextNode; - return; + const temp = this.head; + this.head = newNode; + this.head.nextNode = temp; + } + if (this.tail == null) { + this.tail = newNode; } - } - previousNode = currentNode; - currentNode = currentNode.nextNode; - count += 1; - } - } - - removeAt(index) { - let previousNode = null; - let currentNode = this.head; - - let count = 0; - - if (index === 0) { - this.pop(); - return; + this.size += 1; } - while (currentNode != null) { - if (count == index) { - if (currentNode.nextNode == null) { - previousNode.nextNode = null; - return; + prepend(value) { + let newNode = new Node(value); + if (this.tail == null) { + this.tail = newNode; + if (this.head == null) { + this.head = newNode; + } } else { - previousNode.nextNode = currentNode.nextNode; - return; + const temp = this.tail; + temp.nextNode = newNode; + this.tail = newNode; } - } - - previousNode = currentNode; - currentNode = currentNode.nextNode; - count += 1; - } - } - - toString() { - let nodes = []; - let current = this.head; - - - while (current != null) { - nodes.push(current.value); - current = current.nextNode; + this.size += 1; } - console.log(nodes.join(" -> ") + " -> null"); - } + at(index) { + function nodeAtIndex(index, count, node) { + if (index === count) { + return node; + } else if (node.nextNode == null) { + return null; + } else { + return nodeAtIndex(index, count + 1, node.nextNode); + } + } + + return nodeAtIndex(index, 0, this.head); + } + pop() { + if (this.head.nextNode == null) { + this.head = null; + this.tail = null; + } else { + this.head = this.head.nextNode; + } + this.size -= 1; + } + + contains(value) { + function searchNodes(node, value) { + if (node.value === value) { + return true; + } else if (node.nextNode == null) { + return false; + } else { + return searchNodes(node.nextNode, value); + } + } + + return searchNodes(this.head, value); + } + + find(value) { + let index = 0; + function searchNodes(node, value, index) { + if (node.value === value) { + return index; + } else if (node.nextNode == null) { + return null; + } else { + return searchNodes(node.nextNode, value, index + 1); + } + } + + return searchNodes(this.head, value, index); + } + + insertAt(value, index) { + let previousNode = null; + let newNode = new Node(value); + let currentNode = this.head; + let count = 0; + + if (index === 0) { + this.append(value); + return; + } + + while (currentNode != null) { + if (count == index) { + if (currentNode.nextNode == null) { + this.prepend(value); + return; + } else { + let nextNode = currentNode; + previousNode.nextNode = newNode; + newNode.nextNode = nextNode; + return; + } + } + + previousNode = currentNode; + currentNode = currentNode.nextNode; + count += 1; + } + } + + removeAt(index) { + let previousNode = null; + let currentNode = this.head; + let count = 0; + + if (index === 0) { + this.pop(); + return; + } + + while (currentNode != null) { + if (count == index) { + if (currentNode.nextNode == null) { + previousNode.nextNode = null; + return; + } else { + previousNode.nextNode = currentNode.nextNode; + return; + } + } + + previousNode = currentNode; + currentNode = currentNode.nextNode; + count += 1; + } + } + + toString() { + let nodes = []; + let current = this.head; + + while (current != null) { + nodes.push(current.value); + current = current.nextNode; + } + + console.log(nodes.join(' -> ') + ' -> null'); + } + + remove(value) { + let count = 0; + let previousNode = null; + let currentNode = this.head; + + if (this.head.value === value) { + this.pop(); + return; + } + + while (currentNode) { + if (currentNode.value === value) { + previousNode.nextNode = currentNode.nextNode; + return; + } + previousNode = currentNode; + currentNode = currentNode.nextNode; + } + } } class Node { - constructor(value) { - this.value = value; - this.nextNode = null; - } + constructor(value) { + this.value = value; + this.nextNode = null; + } } -let list = new LinkedList(); - -list.append("test 5"); -list.prepend("test 8"); -list.append("test 1"); -list.append("test 2"); -list.append("test 3"); -list.append("test 4"); -list.prepend("Deez Nuts"); -list.toString(); -console.log(list.find("Deez Nuts")); -console.log(list.find("test ")); -console.log(list.contains("test 3")); - -console.log(list.size); -console.log(list.at(1).value); -console.log("popping last element"); -list.pop(); -list.toString(); -list.insertAt("inserted 3", 3); -// list.insertAt("inserted 1", 1); -list.toString(); -list.insertAt("inserted 1", 1); -list.toString(); -list.removeAt(6); -console.log("Removing element 6"); -list.toString(); -console.log('removing inserted elements') -list.removeAt(1); -list.removeAt(3); -list.toString(); -console.log("Removing element 1"); -list.removeAt(0); -list.toString(); -console.log("Removing element Deez Nuts"); -list.removeAt(3); - -list.toString(); +// let list = new LinkedList(); +// +// list.append('test 5'); +// list.prepend('test 8'); +// list.append('test 1'); +// list.append('test 2'); +// list.append('test 3'); +// list.append('test 4'); +// list.prepend('Deez Nuts'); +// list.toString(); +// console.log(list.find('Deez Nuts')); +// console.log(list.find('test ')); +// console.log(list.contains('test 3')); +// +// console.log(list.size); +// console.log(list.at(1).value); +// console.log('popping last element'); +// list.pop(); +// list.toString(); +// list.insertAt('inserted 3', 3); +// // list.insertAt("inserted 1", 1); +// list.toString(); +// list.insertAt('inserted 1', 1); +// list.toString(); +// list.removeAt(6); +// console.log('Removing element 6'); +// list.toString(); +// console.log('removing inserted elements'); +// list.removeAt(1); +// list.removeAt(3); +// list.toString(); +// console.log('Removing element 1'); +// list.removeAt(0); +// list.toString(); +// console.log('Removing element Deez Nuts'); +// list.removeAt(3); +// list.toString(); +export { LinkedList }; diff --git a/csci/package-lock.json b/csci/package-lock.json new file mode 100644 index 0000000..fbccddc --- /dev/null +++ b/csci/package-lock.json @@ -0,0 +1,1262 @@ +{ + "name": "csci", + "version": "1.0.0", + "lockfileVersion": 3, + "requires": true, + "packages": { + "": { + "name": "csci", + "version": "1.0.0", + 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+1,266 @@ // https://github.com/TheOdinProject/curriculum/issues/27103 class Node { - constructor(key, value) { - this.key = key; - this.value = value; - this.next = null; - } + constructor(key, value) { + this.key = key; + this.value = value; + this.next = null; + } } class LinkedList { - constructor() { - this.size = 0; - this.head = null; - this.tail = null; - } - - append(key, value) { - let newNode = new Node(key, value); - if (this.head == null) { - this.head = newNode; - } else { - const temp = this.head; - this.head = newNode; - this.head.next = temp; - } - if (this.tail == null) { - this.tail = newNode; - } - - this.size += 1; - } - pop() { - if (this.head.next == null) { - this.head = null; - this.tail = null; - } else { - this.head = this.head.next; - } - this.size -= 1; - } - - contains(key) { - function searchNodes(node, key) { - if (node.key === key) { - return true; - } else if (node.next == null) { - return false; - } else { - return searchNodes(node.next); - } - } - - return searchNodes(this.head, key); - } - - replace(key, value) { - function replace(node) { - if (node.key === key) { - node.value = value; - } else { - return replace(node.next); - } - } - replace(this.head, key); - } - - find(key) { - function searchNodes(node, key) { - if (node.key === key) { - return node.value; - } else if (node.next == null) { - return null; - } else { - return searchNodes(node.next, key); - } - } - - return searchNodes(this.head, key); - } - remove(key) { - let lastNode = this.head; - let currentNode = this.head; - - if (currentNode.key === key) { - if (currentNode.next == null) { + constructor() { this.size = 0; this.head = null; this.tail = null; - } else { - this.size -= 1; - this.head = this.head.next; - } - return true; } - while (currentNode) { - if (currentNode.key === key) { - lastNode.next = currentNode.next; - this.size -= 1; - return true; - } - lastNode = currentNode; - currentNode = currentNode.next; + append(key, value) { + let newNode = new Node(key, value); + if (this.head == null) { + this.head = newNode; + } else { + const temp = this.head; + this.head = newNode; + this.head.next = temp; + } + if (this.tail == null) { + this.tail = newNode; + } + + this.size += 1; + } + pop() { + if (this.head.next == null) { + this.head = null; + this.tail = null; + } else { + this.head = this.head.next; + } + this.size -= 1; + } + + contains(key) { + function searchNodes(node, key) { + if (node.key === key) { + return true; + } else if (node.next == null) { + return false; + } else { + return searchNodes(node.next); + } + } + + return searchNodes(this.head, key); + } + + replace(key, value) { + function replace(node) { + if (node.key === key) { + node.value = value; + } else { + return replace(node.next); + } + } + replace(this.head, key); + } + + find(key) { + function searchNodes(node, key) { + if (node.key === key) { + return node.value; + } else if (node.next == null) { + return null; + } else { + return searchNodes(node.next, key); + } + } + + return searchNodes(this.head, key); + } + remove(key) { + let lastNode = this.head; + let currentNode = this.head; + + if (currentNode.key === key) { + if (currentNode.next == null) { + this.size = 0; + this.head = null; + this.tail = null; + } else { + this.size -= 1; + this.head = this.head.next; + } + return true; + } + + while (currentNode) { + if (currentNode.key === key) { + lastNode.next = currentNode.next; + this.size -= 1; + return true; + } + lastNode = currentNode; + currentNode = currentNode.next; + } + return false; } - return false; - } } class HashMap { - constructor(capacity = 8) { - this.initialCapacity = capacity; - this.capacity = capacity; - this.buckets = Array(capacity); - this.capacity = this.buckets.length; - this.loadFactor = 0.75; - } - - stringToNumber(string) { - let hashCode = 0; - const primeNumber = 31; - - for (let i = 0; i < string.length; i++) { - hashCode = primeNumber * hashCode + string.charCodeAt(i); + constructor(capacity = 8) { + this.initialCapacity = capacity; + this.capacity = capacity; + this.buckets = Array(capacity); + this.capacity = this.buckets.length; + this.loadFactor = 0.75; } - return hashCode; - } + stringToNumber(string) { + let hashCode = 0; + const primeNumber = 31; - hash(key) { - return this.stringToNumber(key); - } - - capacityWatcher() { - let consumed = this.buckets.filter(Object).length; - if (consumed >= this.capacity * this.loadFactor) { - this.capacity = Math.round(1.25 * this.capacity); - } - } - - set(key, value) { - let _hash = this.hash(key); - let bucketIndex = _hash % this.capacity; - this.capacityWatcher(); - if (this.buckets[bucketIndex] == undefined) { - let linkedList = new LinkedList(); - linkedList.append(key, value); - - this.buckets[bucketIndex] = linkedList; - } else { - let keyExists = this.buckets[bucketIndex].contains(key); - - if (keyExists) { - this.buckets[bucketIndex].replace(key, value); - } else { - this.buckets[bucketIndex].append(key, value); - } - } - } - - get(key) { - for (let i = 0; i < this.buckets.length; i++) { - if (this.buckets[i]) { - let value = this.buckets[i].find(key); - if (value) return value; - } - } - } - has(key) { - for (let i = 0; i < this.buckets.length; i++) { - if (this.buckets[i]) { - let value = this.buckets[i].find(key); - if (value) return true; - } - } - return false; - } - remove(key) { - for (let i = 0; i < this.buckets.length; i++) { - if (this.buckets[i]) { - let removed = this.buckets[i].remove(key); - if (this.buckets[i].size === 0) this.buckets[i] = undefined; - if (removed) return true; - } - } - return false; - } - length() { - let count = 0; - - for (let i = 0; i < this.buckets.length; i++) { - if (this.buckets[i]) { - count += this.buckets[i].size; - } - } - return count; - } - clear() { - this.capacity = this.initialCapacity; - this.buckets = Array(this.capacity); - } - keys() { - let _keys = []; - - for (let i = 0; i < this.buckets.length; i++) { - if (this.buckets[i]) { - let currentNode = this.buckets[i].head; - while (currentNode) { - _keys.push(currentNode.key); - currentNode = currentNode.next; + for (let i = 0; i < string.length; i++) { + hashCode = primeNumber * hashCode + string.charCodeAt(i); } - } - } - return _keys; - } - values() { - let _values = []; - for (let i = 0; i < this.buckets.length; i++) { - if (this.buckets[i]) { - let currentNode = this.buckets[i].head; - while (currentNode) { - _values.push(currentNode.value); - currentNode = currentNode.next; - } - } + return hashCode; } - return _values; - } - entries() { - let _entries = []; - for (let i = 0; i < this.buckets.length; i++) { - if (this.buckets[i]) { - let currentNode = this.buckets[i].head; - while (currentNode) { - _entries.push([currentNode.key, currentNode.value]); - currentNode = currentNode.next; - } - } + hash(key) { + return this.stringToNumber(key); + } + + capacityWatcher() { + let consumed = this.buckets.filter(Object).length; + if (consumed >= this.capacity * this.loadFactor) { + this.capacity = Math.round(1.25 * this.capacity); + } + } + + set(key, value) { + let _hash = this.hash(key); + let bucketIndex = _hash % this.capacity; + this.capacityWatcher(); + if (this.buckets[bucketIndex] == undefined) { + let linkedList = new LinkedList(); + linkedList.append(key, value); + + this.buckets[bucketIndex] = linkedList; + } else { + let keyExists = this.buckets[bucketIndex].contains(key); + + if (keyExists) { + this.buckets[bucketIndex].replace(key, value); + } else { + this.buckets[bucketIndex].append(key, value); + } + } + } + + get(key) { + for (let i = 0; i < this.buckets.length; i++) { + if (this.buckets[i]) { + let value = this.buckets[i].find(key); + if (value) return value; + } + } + } + has(key) { + for (let i = 0; i < this.buckets.length; i++) { + if (this.buckets[i]) { + let value = this.buckets[i].find(key); + if (value) return true; + } + } + return false; + } + remove(key) { + for (let i = 0; i < this.buckets.length; i++) { + if (this.buckets[i]) { + let removed = this.buckets[i].remove(key); + if (this.buckets[i].size === 0) this.buckets[i] = undefined; + if (removed) return true; + } + } + return false; + } + length() { + let count = 0; + + for (let i = 0; i < this.buckets.length; i++) { + if (this.buckets[i]) { + count += this.buckets[i].size; + } + } + return count; + } + clear() { + this.capacity = this.initialCapacity; + this.buckets = Array(this.capacity); + } + keys() { + let _keys = []; + + for (let i = 0; i < this.buckets.length; i++) { + if (this.buckets[i]) { + let currentNode = this.buckets[i].head; + while (currentNode) { + _keys.push(currentNode.key); + currentNode = currentNode.next; + } + } + } + return _keys; + } + values() { + let _values = []; + + for (let i = 0; i < this.buckets.length; i++) { + if (this.buckets[i]) { + let currentNode = this.buckets[i].head; + while (currentNode) { + _values.push(currentNode.value); + currentNode = currentNode.next; + } + } + } + return _values; + } + entries() { + let _entries = []; + + for (let i = 0; i < this.buckets.length; i++) { + if (this.buckets[i]) { + let currentNode = this.buckets[i].head; + while (currentNode) { + _entries.push([currentNode.key, currentNode.value]); + currentNode = currentNode.next; + } + } + } + return _entries; } - return _entries; - } } let t = new HashMap(); // Starter Data -t.set("football", "redskins"); -t.set("framework", "laptop"); -t.set("framework 2", "sucks"); -t.set("deliver", "me"); -t.set("alpha", "omega"); -t.set("hello", "world"); -t.set("hello", "smigs"); -t.set("helo", "world"); -t.set("omg kevin that's wild", "world"); -t.set("mike", "world"); -t.set("zebra", "zoo"); -t.set("linux", "tux"); -t.set("c major", "c e g"); -t.remove("zebra"); -t.remove("hello"); +t.set('football', 'redskins'); +t.set('framework', 'laptop'); +t.set('framework 2', 'sucks'); +t.set('deliver', 'me'); +t.set('alpha', 'omega'); +t.set('hello', 'world'); +t.set('hello', 'smigs'); +t.set('helo', 'world'); +t.set("omg kevin that's wild", 'world'); +t.set('mike', 'world'); +t.set('zebra', 'zoo'); +t.set('linux', 'tux'); +t.set('c major', 'c e g'); +t.remove('zebra'); +t.remove('hello'); console.log(t.length()); // Print the Keys console.log(t.keys()); @@ -271,57 +271,57 @@ console.log(t.entries()); // clear the hashmap t.clear(); -console.log("Stuff was cleared"); -console.log("new data set"); -t.set("football", "redskins"); -t.set("framework", "laptop"); -t.set("framework 2", "sucks"); -t.set("deliver", "me"); -t.set("alpha", "omega"); -t.set("hello", "world"); -t.set("hello", "smigs"); -t.set("helo", "world"); -t.set("omg kevin that's wild", "world"); -t.set("mike", "world"); -t.set("zebra", "zoo"); -t.set("linux", "tux"); -t.set("c major", "c e g"); -t.set("user_role", "DevOps Engineer"); -t.set("interests", "Blogging, Influencing, Stocks, Generating Income"); -t.set("goals", "Build following / grow community, Learn and grow, Technology"); -t.set("preferred_name", "Smig"); -t.set("data_request", "Create key value pairs for an arbitrary data set"); -t.set("format", "t.set('key', 'value')"); -t.set("entries", "30"); -t.set("entry_1", "value_1"); -t.set("entry_2", "value_2"); -t.set("entry_3", "value_3"); -t.set("entry_4", "value_4"); -t.set("entry_5", "value_5"); -t.set("entry_6", "value_6"); -t.set("entry_7", "value_7"); -t.set("entry_8", "value_8"); -t.set("entry_9", "value_9"); -t.set("entry_10", "value_10"); -t.set("entry_11", "value_11"); -t.set("entry_12", "value_12"); -t.set("entry_13", "value_13"); -t.set("entry_14", "value_14"); -t.set("entry_15", "value_15"); -t.set("entry_16", "value_16"); -t.set("entry_17", "value_17"); -t.set("entry_18", "value_18"); -t.set("entry_19", "value_19"); -t.set("entry_20", "value_20"); -t.set("entry_21", "value_21"); -t.set("entry_22", "value_22"); -t.set("entry_23", "value_23"); -t.set("entry_24", "value_24"); -t.set("entry_25", "value_25"); -t.set("entry_26", "value_26"); -t.set("entry_27", "value_27"); -t.set("entry_28", "value_28"); -t.set("entry_29", "value_29"); -t.set("entry_30", "value_30"); +console.log('Stuff was cleared'); +console.log('new data set'); +t.set('football', 'redskins'); +t.set('framework', 'laptop'); +t.set('framework 2', 'sucks'); +t.set('deliver', 'me'); +t.set('alpha', 'omega'); +t.set('hello', 'world'); +t.set('hello', 'smigs'); +t.set('helo', 'world'); +t.set("omg kevin that's wild", 'world'); +t.set('mike', 'world'); +t.set('zebra', 'zoo'); +t.set('linux', 'tux'); +t.set('c major', 'c e g'); +t.set('user_role', 'DevOps Engineer'); +t.set('interests', 'Blogging, Influencing, Stocks, Generating Income'); +t.set('goals', 'Build following / grow community, Learn and grow, Technology'); +t.set('preferred_name', 'Smig'); +t.set('data_request', 'Create key value pairs for an arbitrary data set'); +t.set('format', "t.set('key', 'value')"); +t.set('entries', '30'); +t.set('entry_1', 'value_1'); +t.set('entry_2', 'value_2'); +t.set('entry_3', 'value_3'); +t.set('entry_4', 'value_4'); +t.set('entry_5', 'value_5'); +t.set('entry_6', 'value_6'); +t.set('entry_7', 'value_7'); +t.set('entry_8', 'value_8'); +t.set('entry_9', 'value_9'); +t.set('entry_10', 'value_10'); +t.set('entry_11', 'value_11'); +t.set('entry_12', 'value_12'); +t.set('entry_13', 'value_13'); +t.set('entry_14', 'value_14'); +t.set('entry_15', 'value_15'); +t.set('entry_16', 'value_16'); +t.set('entry_17', 'value_17'); +t.set('entry_18', 'value_18'); +t.set('entry_19', 'value_19'); +t.set('entry_20', 'value_20'); +t.set('entry_21', 'value_21'); +t.set('entry_22', 'value_22'); +t.set('entry_23', 'value_23'); +t.set('entry_24', 'value_24'); +t.set('entry_25', 'value_25'); +t.set('entry_26', 'value_26'); +t.set('entry_27', 'value_27'); +t.set('entry_28', 'value_28'); +t.set('entry_29', 'value_29'); +t.set('entry_30', 'value_30'); console.log(t.keys()); console.log(t.entries()); diff --git a/csci/projectHashSet.js b/csci/projectHashSet.js new file mode 100644 index 0000000..1d2e3d0 --- /dev/null +++ b/csci/projectHashSet.js @@ -0,0 +1,116 @@ +// import { LinkedList } from './linkedList'; +import { LinkedList } from './linkedList.js'; + +class HashSet { + constructor(capacity = 8) { + this.initialCapacity = capacity; + this.capacity = capacity; + this.buckets = Array(capacity); + this.capacity = this.buckets.length; + this.loadFactor = 0.75; + } + + stringToNumber(string) { + let hashCode = 0; + const primeNumber = 31; + + for (let i = 0; i < string.length; i++) { + hashCode = primeNumber * hashCode + string.charCodeAt(i); + } + + return hashCode; + } + + hash(key) { + return this.stringToNumber(key); + } + + capacityWatcher() { + let consumed = this.buckets.filter(Object).length; + if (consumed >= this.capacity * this.loadFactor) { + this.capacity = Math.round(1.25 * this.capacity); + } + } + + set(key) { + let _hash = this.hash(key); + let bucketIndex = _hash % this.capacity; + this.capacityWatcher(); + if (this.buckets[bucketIndex] == undefined) { + let linkedList = new LinkedList(); + linkedList.append(key); + + this.buckets[bucketIndex] = linkedList; + } else { + let keyExists = this.buckets[bucketIndex].contains(key); + + if (keyExists) { + return; + } else { + this.buckets[bucketIndex].append(key); + } + } + } + + get(key) { + for (let i = 0; i < this.buckets.length; i++) { + if (this.buckets[i]) { + let value = this.buckets[i].find(key); + if (value) return true; + } + } + return false; + } + remove(key) { + for (let i = 0; i < this.buckets.length; i++) { + if (this.buckets[i]) { + let removed = this.buckets[i].remove(key); + if (this.buckets[i].size === 0) this.buckets[i] = undefined; + if (removed) return true; + } + } + return false; + } + length() { + let count = 0; + + for (let i = 0; i < this.buckets.length; i++) { + if (this.buckets[i]) { + count += this.buckets[i].size; + } + } + return count; + } + clear() { + this.capacity = this.initialCapacity; + this.buckets = Array(this.capacity); + } + keys() { + let _keys = []; + + for (let i = 0; i < this.buckets.length; i++) { + if (this.buckets[i]) { + let currentNode = this.buckets[i].head; + while (currentNode) { + _keys.push(currentNode.value); + currentNode = currentNode.nextNode; + } + } + } + return _keys; + } +} + +const _set = new HashSet(); +_set.set('test'); +_set.set('test'); +_set.set('hello'); +_set.set('deeeez'); +_set.set('deeez'); +_set.set('deez'); +_set.set('dez'); +_set.set('trueskii'); +_set.set('mike'); +console.log(_set.keys()); +_set.remove('test'); +console.log(_set.buckets);