Create HashTable.js

Author: HansUXdev

03-DataStructures/HashTable.js

@@ -0,0 +1,51 @@
+class HashTable {
+    constructor(size = 50) {
+      this.size = size;
+      this.buckets = new Array(size);
+    }
+  
+    // Hash function
+    _hash(key) {
+      let hash = 0;
+      for (const char of key) {
+        hash = (hash + char.charCodeAt(0)) % this.size;
+      }
+      return hash;
+    }
+  
+    // Set a key-value pair in the hash table
+    set(key, value) {
+      const index = this._hash(key);
+      if (!this.buckets[index]) {
+        this.buckets[index] = [];
+      }
+      this.buckets[index].push([key, value]);
+    }
+  
+    // Get the value associated with a key
+    get(key) {
+      const index = this._hash(key);
+      if (!this.buckets[index]) {
+        return null;
+      }
+  
+      for (const [storedKey, value] of this.buckets[index]) {
+        if (storedKey === key) {
+          return value;
+        }
+      }
+      return null;
+    }
+  
+    // Other hash table operations (remove, update, etc.) can be added here
+  }
+  
+  // Example usage:
+  const hashTable = new HashTable();
+  
+  hashTable.set('firstName', 'John');
+  hashTable.set('lastName', 'Doe');
+  hashTable.set('age', 30);
+  
+  console.log(hashTable.get('firstName')); // Output: 'John'
+