diff --git a/src/data-structures/base/iterable-base.ts b/src/data-structures/base/iterable-base.ts
index b9333e0..968438a 100644
--- a/src/data-structures/base/iterable-base.ts
+++ b/src/data-structures/base/iterable-base.ts
@@ -154,6 +154,105 @@ export abstract class IterableEntryBase<K = any, V = any> {
    * Time Complexity: O(n)
    * Space Complexity: O(1)
    */
+
+  /**
+   * Time Complexity: O(n)
+   * Space Complexity: O(1)
+   *
+   * The `find` function iterates over the entries of a collection and returns the first value for
+   * which the callback function returns true.
+   * @param callbackfn - The callback function that will be called for each entry in the collection. It
+   * takes three arguments: the value of the entry, the key of the entry, and the index of the entry in
+   * the collection. It should return a boolean value indicating whether the current entry matches the
+   * desired condition.
+   * @param {any} [thisArg] - The `thisArg` parameter is an optional argument that specifies the value
+   * to be used as `this` when executing the `callbackfn` function. If `thisArg` is provided, it will
+   * be passed as the `this` value to the `callbackfn` function. If `thisArg
+   * @returns The method `find` returns the value of the first element in the iterable that satisfies
+   * the provided callback function. If no element satisfies the callback function, `undefined` is
+   * returned.
+   */
+  find(callbackfn: EntryCallback<K, V, [K, V]>, thisArg?: any): [K, V] | undefined {
+    let index = 0;
+    for (const item of this) {
+      const [key, value] = item;
+      if (callbackfn.call(thisArg, value, key, index++, this)) return item;
+    }
+    return;
+  }
+
+  /**
+   * Time Complexity: O(n)
+   * Space Complexity: O(1)
+   */
+
+  /**
+   * Time Complexity: O(n)
+   * Space Complexity: O(1)
+   *
+   * The function checks if a given key exists in a collection.
+   * @param {K} key - The parameter "key" is of type K, which means it can be any type. It represents
+   * the key that we want to check for existence in the data structure.
+   * @returns a boolean value. It returns true if the key is found in the collection, and false
+   * otherwise.
+   */
+  has(key: K): boolean {
+    for (const item of this) {
+      const [itemKey] = item;
+      if (itemKey === key) return true;
+    }
+    return false;
+  }
+
+  /**
+   * Time Complexity: O(n)
+   * Space Complexity: O(1)
+   */
+
+  /**
+   * Time Complexity: O(n)
+   * Space Complexity: O(1)
+   *
+   * The function checks if a given value exists in a collection.
+   * @param {V} value - The parameter "value" is the value that we want to check if it exists in the
+   * collection.
+   * @returns a boolean value, either true or false.
+   */
+  hasValue(value: V): boolean {
+    for (const [, elementValue] of this) {
+      if (elementValue === value) return true;
+    }
+    return false;
+  }
+
+  /**
+   * Time Complexity: O(n)
+   * Space Complexity: O(1)
+   */
+
+  /**
+   * Time Complexity: O(n)
+   * Space Complexity: O(1)
+   *
+   * The `get` function retrieves the value associated with a given key from a collection.
+   * @param {K} key - K (the type of the key) - This parameter represents the key that is being
+   * searched for in the collection.
+   * @returns The `get` method returns the value associated with the specified key if it exists in the
+   * collection, otherwise it returns `undefined`.
+   */
+  get(key: K): V | undefined {
+    for (const item of this) {
+      const [itemKey, value] = item;
+      if (itemKey === key) return value;
+    }
+    return;
+  }
+
+  /**
+   * Time Complexity: O(n)
+   * Space Complexity: O(1)
+   */
+
   /**
    * Time Complexity: O(n)
    * Space Complexity: O(1)
@@ -180,13 +279,6 @@ export abstract class IterableEntryBase<K = any, V = any> {
     return accumulator;
   }
 
-  hasValue(value: V): boolean {
-    for (const [, elementValue] of this) {
-      if (elementValue === value) return true;
-    }
-    return false;
-  }
-
   /**
    * Time Complexity: O(n)
    * Space Complexity: O(n)
@@ -198,7 +290,7 @@ export abstract class IterableEntryBase<K = any, V = any> {
   protected abstract _getIterator(...args: any[]): IterableIterator<[K, V]>;
 }
 
-export abstract class IterableElementBase<V> {
+export abstract class IterableElementBase<E> {
   /**
    * Time Complexity: O(n)
    * Space Complexity: O(1)
@@ -212,7 +304,7 @@ export abstract class IterableElementBase<V> {
    * allows the function to accept any number of arguments as an array. In this case, the `args`
    * parameter is used to pass any number of arguments to the `_getIterator` method.
    */
-  * [Symbol.iterator](...args: any[]): IterableIterator<V> {
+  * [Symbol.iterator](...args: any[]): IterableIterator<E> {
     yield* this._getIterator(...args);
   }
 
@@ -226,7 +318,7 @@ export abstract class IterableElementBase<V> {
    *
    * The function returns an iterator that yields all the values in the object.
    */
-  * values(): IterableIterator<V> {
+  * values(): IterableIterator<E> {
     for (const item of this) {
       yield item;
     }
@@ -250,10 +342,10 @@ export abstract class IterableElementBase<V> {
    * @returns The `every` method is returning a boolean value. It returns `true` if every element in
    * the array satisfies the provided predicate function, and `false` otherwise.
    */
-  every(predicate: ElementCallback<V, boolean>, thisArg?: any): boolean {
+  every(predicate: ElementCallback<E, boolean>, thisArg?: any): boolean {
     let index = 0;
     for (const item of this) {
-      if (!predicate.call(thisArg, item as V, index++, this)) {
+      if (!predicate.call(thisArg, item, index++, this)) {
         return false;
       }
     }
@@ -278,10 +370,10 @@ export abstract class IterableElementBase<V> {
    * @returns a boolean value. It returns true if the predicate function returns true for any element
    * in the collection, and false otherwise.
    */
-  some(predicate: ElementCallback<V, boolean>, thisArg?: any): boolean {
+  some(predicate: ElementCallback<E, boolean>, thisArg?: any): boolean {
     let index = 0;
     for (const item of this) {
-      if (predicate.call(thisArg, item as V, index++, this)) {
+      if (predicate.call(thisArg, item, index++, this)) {
         return true;
       }
     }
@@ -292,6 +384,7 @@ export abstract class IterableElementBase<V> {
    * Time Complexity: O(n)
    * Space Complexity: O(1)
    */
+
   /**
    * Time Complexity: O(n)
    * Space Complexity: O(1)
@@ -305,13 +398,65 @@ export abstract class IterableElementBase<V> {
    * to be used as `this` when executing the `callbackfn` function. If `thisArg` is provided, it will
    * be passed as the `this` value to the `callbackfn` function. If `thisArg
    */
-  forEach(callbackfn: ElementCallback<V, void>, thisArg?: any): void {
+  forEach(callbackfn: ElementCallback<E, void>, thisArg?: any): void {
     let index = 0;
     for (const item of this) {
-      callbackfn.call(thisArg, item as V, index++, this);
+      callbackfn.call(thisArg, item, index++, this);
     }
   }
 
+  /**
+   * Time Complexity: O(n)
+   * Space Complexity: O(1)
+   */
+
+  /**
+   * Time Complexity: O(n)
+   * Space Complexity: O(1)
+   *
+   * The `find` function iterates over the elements of an array-like object and returns the first
+   * element that satisfies the provided callback function.
+   * @param callbackfn - The callbackfn parameter is a function that will be called for each element in
+   * the array. It takes three arguments: the current element being processed, the index of the current
+   * element, and the array itself. The function should return a boolean value indicating whether the
+   * current element matches the desired condition.
+   * @param {any} [thisArg] - The `thisArg` parameter is an optional argument that specifies the value
+   * to be used as `this` when executing the `callbackfn` function. If `thisArg` is provided, it will
+   * be passed as the `this` value to the `callbackfn` function. If `thisArg
+   * @returns The `find` method returns the first element in the array that satisfies the provided
+   * callback function. If no element satisfies the callback function, `undefined` is returned.
+   */
+  find(callbackfn: ElementCallback<E, boolean>, thisArg?: any): E | undefined {
+    let index = 0;
+    for (const item of this) {
+      if (callbackfn.call(thisArg, item, index++, this)) return item;
+    }
+
+    return;
+  }
+
+  /**
+   * Time Complexity: O(n)
+   * Space Complexity: O(1)
+   */
+
+  /**
+   * Time Complexity: O(n)
+   * Space Complexity: O(1)
+   *
+   * The function checks if a given element exists in a collection.
+   * @param {E} element - The parameter "element" is of type E, which means it can be any type. It
+   * represents the element that we want to check for existence in the collection.
+   * @returns a boolean value. It returns true if the element is found in the collection, and false
+   * otherwise.
+   */
+  has(element: E): boolean {
+    for (const ele of this) {
+      if (ele === element) return true;
+    }
+    return false;
+  }
+
   /**
    * Time Complexity: O(n)
    * Space Complexity: O(1)
@@ -329,11 +474,11 @@ export abstract class IterableElementBase<V> {
    * @returns The `reduce` method is returning the final value of the accumulator after iterating over
    * all the elements in the array and applying the callback function to each element.
    */
-  reduce<U>(callbackfn: ReduceElementCallback<V, U>, initialValue: U): U {
+  reduce<U>(callbackfn: ReduceElementCallback<E, U>, initialValue: U): U {
     let accumulator = initialValue;
     let index = 0;
     for (const item of this) {
-      accumulator = callbackfn(accumulator, item as V, index++, this);
+      accumulator = callbackfn(accumulator, item as E, index++, this);
     }
     return accumulator;
   }
@@ -346,5 +491,5 @@ export abstract class IterableElementBase<V> {
     console.log([...this]);
   }
 
-  protected abstract _getIterator(...args: any[]): IterableIterator<V>;
+  protected abstract _getIterator(...args: any[]): IterableIterator<E>;
 }
diff --git a/src/data-structures/binary-tree/binary-tree.ts b/src/data-structures/binary-tree/binary-tree.ts
index 32c309b..b3494f4 100644
--- a/src/data-structures/binary-tree/binary-tree.ts
+++ b/src/data-structures/binary-tree/binary-tree.ts
@@ -810,7 +810,7 @@ export class BinaryTree<
    * be performed in a pre-order, in-order, or post-order manner.
    * @returns a boolean value.
    */
-  has<C extends BTNCallback<N>>(
+  override has<C extends BTNCallback<N>>(
     identifier: ReturnType<C> | null | undefined,
     callback: C = this._defaultOneParamCallback as C,
     beginRoot: KeyOrNodeOrEntry<K, V, N> = this.root,
@@ -968,7 +968,7 @@ export class BinaryTree<
    * @returns The value of the node with the given identifier is being returned. If the node is not
    * found, `undefined` is returned.
    */
-  get<C extends BTNCallback<N>>(
+  override get<C extends BTNCallback<N>>(
     identifier: ReturnType<C> | null | undefined,
     callback: C = this._defaultOneParamCallback as C,
     beginRoot: KeyOrNodeOrEntry<K, V, N> = this.root,
diff --git a/src/data-structures/hash/hash-map.ts b/src/data-structures/hash/hash-map.ts
index dca1144..9d7a56e 100644
--- a/src/data-structures/hash/hash-map.ts
+++ b/src/data-structures/hash/hash-map.ts
@@ -147,7 +147,7 @@ export class HashMap<K = any, V = any, R = [K, V]> extends IterableEntryBase<K,
    * @param {K} key - The parameter "key" is of type K, which means it can be any type.
    * @returns The `has` method is returning a boolean value.
    */
-  has(key: K): boolean {
+  override has(key: K): boolean {
     if (this._isObjKey(key)) {
       return this._objMap.has(key);
     } else {
@@ -457,7 +457,7 @@ export class LinkedHashMap<K = any, V = any> extends IterableEntryBase<K, V> {
    * property of the key. If the key is a string key, the value is retrieved from the `_noObjMap` object
    * using the key itself. If the key is not found, `undefined` is
    */
-  get(key: K): V | undefined {
+  override get(key: K): V | undefined {
     if (isWeakKey(key)) {
       const hash = this._objHashFn(key);
       const node = this._objMap.get(hash);
diff --git a/src/data-structures/linked-list/doubly-linked-list.ts b/src/data-structures/linked-list/doubly-linked-list.ts
index 5413188..8298e0f 100644
--- a/src/data-structures/linked-list/doubly-linked-list.ts
+++ b/src/data-structures/linked-list/doubly-linked-list.ts
@@ -520,32 +520,6 @@ export class DoublyLinkedList<E = any> extends IterableElementBase<E> {
     this._size = 0;
   }
 
-  /**
-   * Time Complexity: O(n), where n is the number of elements in the linked list.
-   * Space Complexity: O(1)
-   */
-
-  /**
-   * Time Complexity: O(n), where n is the number of elements in the linked list.
-   * Space Complexity: O(1)
-   *
-   * The `find` function iterates through a linked list and returns the first element that satisfies a given condition.
-   * @param callback - A function that takes a value of type E as its parameter and returns a boolean value. This
-   * function is used to determine whether a particular value in the linked list satisfies a certain condition.
-   * @returns The method `find` returns the first element in the linked list that satisfies the condition specified by
-   * the callback function. If no element satisfies the condition, it returns `undefined`.
-   */
-  find(callback: (value: E) => boolean): E | undefined {
-    let current = this.head;
-    while (current) {
-      if (callback(current.value)) {
-        return current.value;
-      }
-      current = current.next;
-    }
-    return undefined;
-  }
-
   /**
    * Time Complexity: O(n), where n is the number of elements in the linked list.
    * Space Complexity: O(1)
diff --git a/src/data-structures/linked-list/singly-linked-list.ts b/src/data-structures/linked-list/singly-linked-list.ts
index f4773dc..8c064b3 100644
--- a/src/data-structures/linked-list/singly-linked-list.ts
+++ b/src/data-structures/linked-list/singly-linked-list.ts
@@ -484,32 +484,6 @@ export class SinglyLinkedList<E = any> extends IterableElementBase<E> {
     return this;
   }
 
-  /**
-   * Time Complexity: O(n) - Linear time, where n is the length of the list, as it needs to reverse the pointers of each node.
-   * Space Complexity: O(1) - Constant space.
-   */
-
-  /**
-   * Time Complexity: O(n) - Linear time, where n is the length of the list, as it needs to reverse the pointers of each node.
-   * Space Complexity: O(1) - Constant space.
-   *
-   * The `find` function iterates through a linked list and returns the first element that satisfies a given condition.
-   * @param callback - A function that takes a value of type E as its parameter and returns a boolean value. This
-   * function is used to determine whether a particular value in the linked list satisfies a certain condition.
-   * @returns The method `find` returns the first element in the linked list that satisfies the condition specified by
-   * the callback function. If no element satisfies the condition, it returns `undefined`.
-   */
-  find(callback: (value: E) => boolean): E | undefined {
-    let current = this.head;
-    while (current) {
-      if (callback(current.value)) {
-        return current.value;
-      }
-      current = current.next;
-    }
-    return undefined;
-  }
-
   /**
    * Time Complexity: O(n) - Linear time, where n is the length of the list, as it needs to reverse the pointers of each node.
    * Space Complexity: O(1) - Constant space.
diff --git a/src/data-structures/queue/deque.ts b/src/data-structures/queue/deque.ts
index db702e1..ac6c2c5 100644
--- a/src/data-structures/queue/deque.ts
+++ b/src/data-structures/queue/deque.ts
@@ -549,32 +549,6 @@ export class Deque<E> extends IterableElementBase<E> {
     this._buckets = newBuckets;
   }
 
-  /**
-   * Time Complexity: O(n)
-   * Space Complexity: O(1)
-   */
-
-  /**
-   * Time Complexity: O(n)
-   * Space Complexity: O(1)
-   *
-   * The `find` function iterates over the elements in a deque and returns the first element for which
-   * the callback function returns true, or undefined if no such element is found.
-   * @param callback - A function that takes three parameters: element, index, and deque. It should
-   * return a boolean value indicating whether the element satisfies a certain condition.
-   * @returns The method `find` returns the first element in the deque that satisfies the condition
-   * specified by the callback function. If no element satisfies the condition, it returns `undefined`.
-   */
-  find(callback: (element: E, index: number, deque: Deque<E>) => boolean): E | undefined {
-    for (let i = 0; i < this.size; ++i) {
-      const element = this.getAt(i);
-      if (callback(element, i, this)) {
-        return element;
-      }
-    }
-    return;
-  }
-
   /**
    * Time Complexity: O(n)
    * Space Complexity: O(1)
diff --git a/test/unit/data-structures/linked-list/doubly-linked-list.test.ts b/test/unit/data-structures/linked-list/doubly-linked-list.test.ts
index f5036e4..49a0444 100644
--- a/test/unit/data-structures/linked-list/doubly-linked-list.test.ts
+++ b/test/unit/data-structures/linked-list/doubly-linked-list.test.ts
@@ -39,6 +39,8 @@ describe('DoublyLinkedList Operation Test', () => {
 
   it('should find undefined', () => {
     expect(list.find(value => value === 6)).toBe(undefined);
+    expect(list.find(value => value === 4)).toBe(4);
+    expect(list.find(value => value === 3)).toBe(3);
   });
 
   it('should indexOf -1', () => {
diff --git a/test/unit/data-structures/linked-list/singly-linked-list.test.ts b/test/unit/data-structures/linked-list/singly-linked-list.test.ts
index b9debbb..d2dd260 100644
--- a/test/unit/data-structures/linked-list/singly-linked-list.test.ts
+++ b/test/unit/data-structures/linked-list/singly-linked-list.test.ts
@@ -327,6 +327,7 @@ describe('SinglyLinkedList Operation Test', () => {
       list.push(3);
       const result = list.find(data => data % 2 === 0);
       expect(result).toBe(2);
+      expect(list.find(value => value === 3)).toBe(3);
     });
 
     it('should return undefined if element is not found', () => {