{"id":4884,"date":"2021-09-13T03:05:06","date_gmt":"2021-09-13T03:05:06","guid":{"rendered":"https:\/\/www.prepbytes.com\/blog\/?p=4884"},"modified":"2022-11-18T07:29:29","modified_gmt":"2022-11-18T07:29:29","slug":"delete-all-occurrences-of-a-given-key-in-a-doubly-linked-list","status":"publish","type":"post","link":"https:\/\/prepbytes.com\/blog\/delete-all-occurrences-of-a-given-key-in-a-doubly-linked-list\/","title":{"rendered":"Delete all occurrences of a given key in a doubly linked list"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/prepbytes-misc-images.s3.ap-south-1.amazonaws.com\/assets\/1645000458359-Article_131.png\" alt=\"\" \/><\/p>\n<p> Removing occurrences in a linked list is quite different than removing occurrences through a is different. So, lets just look into the approach on how to delete all occurrences of a key in doubly linked list <\/p>\n<h3>Problem Statement on how to delete all occurrences of a key in doubly linked list<\/h3>\n<p>We will be given a doubly linked list, and a key X, and our task will be to delete all occurrences of a given key X from the linked list.<\/p>\n<h3>Problem Statement Understanding on how to delete all occurrences of a key in doubly linked list<\/h3>\n<p>Let\u2019s try to understand the problem statement with the help of examples.<\/p>\n<p>According to the problem statement, we will be given a doubly linked list and a key X. We have to delete all occurrences of a given key X from the linked list.<\/p>\n<p>If the given doubly linked list is: head \u2192 1 \u2190\u2192 2 \u2190\u2192 5 \u2190\u2192 2 \u2190\u2192 2 and key X = 2.<\/p>\n<ul>\n<li>As we can see that there are 3 occurrences of key X=2 in the given doubly linked list, so we will have to remove all these occurrences of X=3 from the linked list.<\/li>\n<li>Our output linked list after removing all the occurrences of 2 will be: head \u2192 1  \u2190\u2192 5.<\/li>\n<li>Removing all the occurrences of a given key X from the linked list means removing all the nodes from the linked list with data equal to X.<\/li>\n<\/ul>\n<p>If the given doubly linked list is: head \u2192 2 \u2190\u2192 3 \u2190\u2192 3 \u2190\u2192 5 \u2190\u2192 3 \u2190\u2192 2 \u2190\u2192 5 \u2190\u2192 2 \u2190\u2192 2 and key X=3.<\/p>\n<ul>\n<li>Our doubly linked list after removal of all the occurrences of X=3 will be: head \u2192 2 \u2190\u2192 5  \u2190\u2192 2 \u2190\u2192 5 \u2190\u2192 2 \u2190\u2192 2<\/li>\n<\/ul>\n<h5>Some more examples<\/h5>\n<p>Sample Input 1: head \u2192 1 \u2190\u2192 3 \u2190\u2192 5 \u2190\u2192 3 \u2190\u2192 4, X = 3<br \/>\nSample Output 1: head \u2192 1 \u2190\u2192 5 \u2190\u2192 4.<\/p>\n<p>Sample Input 2: head \u2192 1 \u2190\u2192 3 \u2190\u2192 5 \u2190\u2192 7 \u2190\u2192 9 \u2190\u2192 1 \u2190\u2192 3 \u2190\u2192 5 \u2190\u2192 7, X = 5<br \/>\nSample Output 2: head \u2192 1 \u2190\u2192 3 \u2190\u2192 7 \u2190\u2192 9 \u2190\u2192 1 \u2190\u2192 3  \u2190\u2192 7.<\/p>\n<p>Now I think from the above examples, the problem statement is clear. So let&#8217;s see how we will approach it. Any Ideas?<\/p>\n<ul>\n<li>If not, it&#8217;s okay. We will see in the next section thoroughly how we can approach this problem.<\/li>\n<\/ul>\n<p>Let\u2019s move to the next section.<\/p>\n<h3>Approach on how to delete all occurrences of a key in doubly linked list<\/h3>\n<p>Our approach will be simple: <\/p>\n<ul>\n<li>We will start traversing through the list and if the current node&#8217;s data is equal to X, we will join the current&#8217;s previous node to its next node and will delete the current node.<\/li>\n<\/ul>\n<p><strong>How to delete a node from a doubly linked list?<\/strong><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/prepbytes.com\/blog\/wp-content\/uploads\/2021\/09\/Delete-all-occurrences-of-a-given-key-in-a-doubly-linked-list-1.png\" alt=\"\" \/><\/p>\n<p>To see throughly how we can delete a node from a doubly linked list visit our article <a href=\"https:\/\/prepbytes.com\/blog\/linked-list\/delete-a-node-in-doubly-linked-list\/\">Delete a node in Doubly Linked List<\/a>.<\/p>\n<h3>Algorithm on how to delete all occurrences of a key in doubly linked list<\/h3>\n<ol>\n<li>Initialize pointer variable <strong>curr<\/strong> with head node.<\/li>\n<li>We will start traversing the linked list using pointer <strong>curr<\/strong>.\n<ul>\n<li>While traversing the list, if the current node\u2019s data <strong>(curr-&gt;data)<\/strong> is not equal to X, we will move forward. <\/li>\n<li>While traversing, if the current node\u2019s data <strong>(curr-&gt;data)<\/strong> is equal to X, then we will delete this node and will join the immediate previous node of the current node to current&#8217;s next node.<\/li>\n<\/ul>\n<\/li>\n<li>Our linked list after the traversal will be the final resultant linked list free from nodes having data equal to X.<\/li>\n<\/ol>\n<h3>Dry Run on how to delete all occurrences of a key in doubly linked list<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/prepbytes.com\/blog\/wp-content\/uploads\/2021\/09\/Delete-all-occurrences-of-a-given-key-in-a-doubly-linked-list-2.png\" alt=\"\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/prepbytes.com\/blog\/wp-content\/uploads\/2021\/09\/Delete-all-occurrences-of-a-given-key-in-a-doubly-linked-list-3.png\" alt=\"\" \/><\/p>\n<h3>Code Implementation on how to delete all occurrences of a key in doubly linked list<\/h3>\n\t\t\t\t\t\t<style>\r\n\t\t\t\t\r\n\t\t\t\t\t#tab_container_4886 {\r\n\toverflow:hidden;\r\n\tdisplay:block;\r\n\twidth:100%;\r\n\tborder:0px solid #ddd;\r\n\tmargin-bottom:30px;\r\n\t}\r\n\r\n#tab_container_4886 .tab-content{\r\n\tpadding:20px;\r\n\tborder: 1px solid #e6e6e6 !important;\r\n\tmargin-top: 0px;\r\n\tbackground-color:#ffffff !important;\r\n\tcolor: #000000 !important;\r\n\tfont-size:16px !important;\r\n\tfont-family: Open Sans !important;\r\n\t\r\n\t\tborder: 1px solid #e6e6e6 !important;\r\n\t}\r\n#tab_container_4886 .wpsm_nav-tabs {\r\n    border-bottom: 0px solid #ddd;\r\n}\r\n#tab_container_4886 .wpsm_nav-tabs > li.active > a, #tab_container_4886 .wpsm_nav-tabs > li.active > a:hover, #tab_container_4886 .wpsm_nav-tabs > li.active > a:focus {\r\n\tcolor: #000000 !important;\r\n\tcursor: default;\r\n\tbackground-color: #ffffff !important;\r\n\tborder: 1px solid #e6e6e6 !important;\r\n}\r\n\r\n#tab_container_4886 .wpsm_nav-tabs > li > a {\r\n    margin-right: 0px !important; \r\n    line-height: 1.42857143 !important;\r\n    border: 1px solid #d5d5d5 !important;\r\n    border-radius: 0px 0px 0 0 !important; \r\n\tbackground-color: #e8e8e8 !important;\r\n\tcolor: #000000 !important;\r\n\tpadding: 15px 18px 15px 18px !important;\r\n\ttext-decoration: none !important;\r\n\tfont-size: 14px !important;\r\n\ttext-align:center !important;\r\n\tfont-family: Open Sans !important;\r\n}\r\n#tab_container_4886 .wpsm_nav-tabs > li > a:focus {\r\noutline: 0px !important;\r\n}\r\n\r\n#tab_container_4886 .wpsm_nav-tabs > li > a:before {\r\n\tdisplay:none !important;\r\n}\r\n#tab_container_4886 .wpsm_nav-tabs > li > a:after {\r\n\tdisplay:none !important ;\r\n}\r\n#tab_container_4886 .wpsm_nav-tabs > li{\r\npadding:0px !important ;\r\nmargin:0px;\r\n}\r\n\r\n#tab_container_4886 .wpsm_nav-tabs > li > a:hover , #tab_container_4886 .wpsm_nav-tabs > li > a:focus {\r\n    color: #000000 !important;\r\n    background-color: #e8e8e8 !important;\r\n\tborder: 1px solid #d5d5d5 !important;\r\n\t\r\n}\r\n#tab_container_4886 .wpsm_nav-tabs > li > a .fa{\r\n\r\nmargin-right:5px !important;\r\n\r\nmargin-left:5px !important;\r\n\r\n\r\n}\r\n\r\n\t\t#tab_container_4886 .wpsm_nav-tabs a{\r\n\t\t\tbackground-image: none;\r\n\t\t\tbackground-position: 0 0;\r\n\t\t\tbackground-repeat: repeat-x;\r\n\t\t}\r\n\t\t\t\r\n\r\n\r\n#tab_container_4886 .wpsm_nav-tabs > li {\r\n    float: left;\r\n    margin-bottom: -1px !important;\r\n\tmargin-right:0px !important; \r\n}\r\n\r\n\r\n#tab_container_4886 .tab-content{\r\noverflow:hidden !important;\r\n}\r\n\r\n\r\n@media (min-width: 769px) {\r\n\r\n\t#tab_container_4886 .wpsm_nav-tabs > li{\r\n\t\tfloat:left !important ;\r\n\t\t\t\tmargin-right:-1px !important;\r\n\t\t\t\t\t}\r\n\t#tab_container_4886 .wpsm_nav-tabs{\r\n\t\tfloat:none !important;\r\n\t\tmargin:0px !important;\r\n\t}\r\n\r\n\t#tab_container_4886 .wpsm_nav-tabs > li {\r\n\t\t\t\t\r\n\t}\r\n\t#tab_container_4886 .wpsm_nav{\r\n\t\t\t}\r\n\r\n}\r\n\r\n\r\n\r\n@media (max-width: 768px) {\r\n\t#tab_container_4886 .wpsm_nav-tabs > li {\r\n\t\t\t\t\r\n\t}\r\n\t#tab_container_4886 .wpsm_nav{\r\n\t\t\t}\r\n}\r\n\r\n\r\n\t.wpsm_nav-tabs li:before{\r\n\t\tdisplay:none !important;\r\n\t}\r\n\r\n\t@media (max-width: 768px) {\r\n\t\t\t\t\r\n\t\t\t\t.wpsm_nav-tabs{\r\n\t\t\tmargin-left:0px !important;\r\n\t\t\tmargin-right:0px !important; \r\n\t\t\t\r\n\t\t}\r\n\t\t\t\t#tab_container_4886 .wpsm_nav-tabs > li{\r\n\t\t\tfloat:none !important;\r\n\t\t}\r\n\t\t\t\r\n\t}\t\t\t\t<\/style>\r\n\t\t\t\t<div id=\"tab_container_4886\" >\r\n\t \r\n\t\t\t\t\t<ul class=\"wpsm_nav wpsm_nav-tabs\" role=\"tablist\" id=\"myTab_4886\">\r\n\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t<li role=\"presentation\"  class=\"active\"  onclick=\"do_resize()\">\r\n\t\t\t\t\t\t\t\t<a href=\"#tabs_desc_4886_1\" aria-controls=\"tabs_desc_4886_1\" role=\"tab\" data-toggle=\"tab\">\r\n\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<i class=\"fa fa-code\"><\/i> \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t<span>C++<\/span>\r\n\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t<\/a>\r\n\t\t\t\t\t\t\t<\/li>\r\n\t\t\t\t\t\t\t\t\t\t\t <\/ul>\r\n\r\n\t\t\t\t\t  <!-- Tab panes -->\r\n\t\t\t\t\t  <div class=\"tab-content\" id=\"tab-content_4886\">\r\n\t\t\t\t\t\t\t\t\t\t\t\t <div role=\"tabpanel\" class=\"tab-pane  in active \" id=\"tabs_desc_4886_1\">\r\n\t\t\t\t\t\t\t\t<!-- wp:enlighter\/codeblock {\"language\":\"cpp\"} -->\r\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"cpp\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\r\n#include <bits\/stdc++.h>\r\nusing namespace std;\r\n\r\n\/* Node structure of doubly linked list *\/\r\nstruct Node {\r\n\tint data;\r\n\tstruct Node* next;\r\n\tstruct Node* prev;\r\n};\r\n\r\n\/* Function to delete a node from Doubly Linked List.*\/\r\nvoid deleteNode(struct Node** head, struct Node* curr)\r\n{\r\n\tif (*head == NULL || curr == NULL){\r\n\t\treturn;\r\n    }\r\n\r\n\tif (*head == curr){\r\n        *head = curr->next;\r\n    }\r\n\r\n\tif (curr->next != NULL){\r\n        curr->next->prev = curr->prev;\r\n    }\r\n\r\n\tif (curr->prev != NULL){\r\n        curr->prev->next = curr->next;\r\n    }\r\n\r\n\tfree(curr);\r\n}\r\n\r\n\/* Using this function we will delete all nodes from linked list having data equal to X *\/\r\nvoid removeXoccurrences(struct Node** head, int X)\r\n{\r\n\tif ((*head) == NULL)\r\n\t\treturn;\r\n\r\n\tstruct Node* curr = *head;\r\n\tstruct Node* next;\r\n\r\n\twhile (curr != NULL) {\r\n\t\tif (curr->data == X) {\r\n\t\t\tnext = curr->next;\r\n\t\t\tdeleteNode(head, curr);\r\n\t\t\tcurr = next;\r\n\t\t}\r\n\t\telse\r\n\t\t\tcurr = curr->next;\r\n\t}\r\n}\r\n\r\n\/* Using this function we will insert a node at the beginning of List *\/\r\nvoid push(struct Node** head, int data)\r\n{\r\n\tstruct Node* new_node = (struct Node*)malloc(sizeof(struct Node));\r\n\tnew_node->data = data;\r\n\tnew_node->prev = NULL;\r\n\tnew_node->next = (*head);\r\n\r\n\tif ((*head) != NULL)\r\n\t\t(*head)->prev = new_node;\r\n\r\n\t(*head) = new_node;\r\n}\r\n\r\n\/* Printing linked list *\/\r\nvoid printList(struct Node* head)\r\n{\r\n\tif (head == NULL)\r\n\t\tcout << \"Doubly Linked list empty\";\r\n\r\n\twhile (head != NULL) {\r\n\t\tcout << head->data << \" \";\r\n\t\thead = head->next;\r\n\t}\r\n}\r\n\r\nint main()\r\n{\r\n\tstruct Node* head = NULL;\r\n\tpush(&head, 2);\r\n\tpush(&head, 2);\r\n\tpush(&head, 5);\r\n\tpush(&head, 2);\r\n\tpush(&head, 1);\r\n\r\n\tcout << \"Original Doubly linked list before deletion: \";\r\n\tprintList(head);\r\n\r\n\tint X = 2;\r\n\tremoveXoccurrences(&head, X);\r\n\r\n\tcout << \"&#92;nDoubly linked list after deletion of all occurrences of \"\r\n\t\t<< X << \": \";\r\n\tprintList(head);\r\n\r\n\treturn 0;\r\n}\r\n<\/pre>\r\n<!-- \/wp:enlighter\/codeblock -->\r\n\t\t\t\t\t\t <\/div>\r\n\t\t\t\t\t\t\t\r\n\t\t\t\t\t <\/div>\r\n\t\t\t\t\t \r\n\t\t\t\t <\/div>\r\n <script>\r\n\t\tjQuery(function () {\r\n\t\t\tjQuery('#myTab_4886 a:first').tab('show')\r\n\t\t});\r\n\t\t\r\n\t\t\t\tjQuery(function(){\r\n\t\t\tvar b=\"fadeIn\";\r\n\t\t\tvar c;\r\n\t\t\tvar a;\r\n\t\t\td(jQuery(\"#myTab_4886 a\"),jQuery(\"#tab-content_4886\"));function d(e,f,g){\r\n\t\t\t\te.click(function(i){\r\n\t\t\t\t\ti.preventDefault();\r\n\t\t\t\t\tjQuery(this).tab(\"show\");\r\n\t\t\t\t\tvar h=jQuery(this).data(\"easein\");\r\n\t\t\t\t\tif(c){c.removeClass(a);}\r\n\t\t\t\t\tif(h){f.find(\"div.active\").addClass(\"animated \"+h);a=h;}\r\n\t\t\t\t\telse{if(g){f.find(\"div.active\").addClass(\"animated \"+g);a=g;}else{f.find(\"div.active\").addClass(\"animated \"+b);a=b;}}c=f.find(\"div.active\");\r\n\t\t\t\t});\r\n\t\t\t}\r\n\t\t});\r\n\t\t\r\n\r\n\t\tfunction do_resize(){\r\n\r\n\t\t\tvar width=jQuery( '.tab-content .tab-pane iframe' ).width();\r\n\t\t\tvar height=jQuery( '.tab-content .tab-pane iframe' ).height();\r\n\r\n\t\t\tvar toggleSize = true;\r\n\t\t\tjQuery('iframe').animate({\r\n\t\t\t    width: toggleSize ? width : 640,\r\n\t\t\t    height: toggleSize ? height : 360\r\n\t\t\t  }, 250);\r\n\r\n\t\t\t  toggleSize = !toggleSize;\r\n\t\t}\r\n\r\n\r\n\t<\/script>\r\n\t\t\t\t\r\n\t\t\t\n<h4>Output<\/h4>\n<p>Original Doubly linked list before deletion: 1 2 5 2 2<br \/>\nDoubly linked list after deletion of all occurrences of 2: 1 5 <\/p>\n<p><strong>Time complexity:<\/strong> O(N), Since we have traversed through the list once.\n<\/p>\n<h3> Conclusion <\/h3>\n<p>So, In this blog, We have learned how to delete all occurrences of a key in doubly linked list. We tried to understand how an element actually can be fetched using a key parameter and how it can return the values.Interested in solving more linked list questions which are curated by our expert mentors at PrepBytes, you can follow this link <a href=\"https:\/\/mycode.prepbytes.com\/interview-coding\/practice\/linked-list\">Linked List<\/a>.<\/p>\n<table width=\"641\">\n<tbody>\n<tr>\n<td colspan=\"2\" width=\"641\" style=\"text-align: center\"><strong>Related Articles<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"321\"><a href=\"https:\/\/prepbytes.com\/blog\/linked-list\/doubly-circular-linked-list-introduction-and-insertion\/\">Doubly circular linked list in data structure<\/a><\/td>\n<td width=\"321\"><a href=\"https:\/\/prepbytes.com\/blog\/linked-list\/advantages-disadvantages-and-uses-of-a-doubly-linked-list\/\">Application of doubly linked list<\/a><\/td>\n<\/tr>\n<tr>\n<td width=\"321\"><a href=\"https:\/\/prepbytes.com\/blog\/linked-list\/applications-of-linked-list-data-structure\/\">Applications of linked list<\/a><\/td>\n<td width=\"321\"><a href=\"https:\/\/prepbytes.com\/blog\/linked-list\/difference-between-a-singly-linked-list-and-a-doubly-linked-list\/\">Singly linked list vs doubly linked list<\/a><\/td>\n<\/tr>\n<tr>\n<td width=\"321\"><a href=\"https:\/\/prepbytes.com\/blog\/linked-list\/advantage-and-disadvantage-of-linked-list-over-array\/\">Advantages and disadvantages of linked list<\/a><\/td>\n<td width=\"321\"><a href=\"https:\/\/prepbytes.com\/blog\/linked-list\/menu-driven-program-for-all-operations-on-doubly-linked-list-in-c\/\">Doubly linked list all operations in C<\/a><\/td>\n<\/tr>\n<tr>\n<td width=\"321\"><a href=\"https:\/\/prepbytes.com\/blog\/binary-search\/binary-search-on-linked-list\/\">Binary search in linked list<\/a><\/td>\n<td width=\"321\"><a href=\"https:\/\/prepbytes.com\/blog\/linked-list\/bubble-sort-for-linked-list-by-swapping-nodes\/\">Bubble sort linked list<\/a><\/td>\n<\/tr>\n<tr>\n<td width=\"321\"><a href=\"https:\/\/prepbytes.com\/blog\/linked-list\/delete-a-node-in-doubly-linked-list\/\">Deletion in doubly linked list<\/a><\/td>\n<td width=\"321\"><a href=\"https:\/\/prepbytes.com\/blog\/linked-list\/delete-middle-of-linked-list\/\">Delete the middle node of a linked list<\/a><\/td>\n<\/tr>\n<tr>\n<td width=\"321\"><a href=\"https:\/\/prepbytes.com\/blog\/linked-list\/adding-two-polynomials-using-linked-list\/\">Polynomial addition using linked list<\/a><\/td>\n<td width=\"321\"><a href=\"https:\/\/prepbytes.com\/blog\/linked-list\/find-the-smallest-and-largest-elements-in-a-singly-linked-list\/\">Find max value and min value in linked list<\/a><\/td>\n<\/tr>\n<tr>\n<td width=\"321\"><a href=\"https:\/\/prepbytes.com\/blog\/linked-list\/insert-a-node-at-a-specific-position-in-a-linked-list\/\">Insert a node at a specific position in a linked list<\/a><\/td>\n<td width=\"321\"><a href=\"https:\/\/prepbytes.com\/blog\/linked-list\/swap-nodes-in-a-linked-list-without-swapping-data\/\">Swap nodes in linked list<\/a><\/td>\n<\/tr>\n<tr>\n<td width=\"321\"><a href=\"https:\/\/prepbytes.com\/blog\/linked-list\/add-two-numbers-represented-by-linked-lists-set-1\/\">Add two numbers represented by linked lists<\/a><\/td>\n<td width=\"321\"><a href=\"https:\/\/prepbytes.com\/blog\/linked-list\/find-the-first-node-of-the-loop-in-a-linked-list\/\">Find starting point of loop in linked list<\/a><\/td>\n<\/tr>\n<tr>\n<td width=\"321\"><a href=\"https:\/\/prepbytes.com\/blog\/linked-list\/merge-sort-on-a-singly-linked-list\/\">Merge sort linked list<\/a><\/td>\n<td width=\"321\"><a href=\"https:\/\/prepbytes.com\/blog\/linked-list\/delete-a-node-at-a-given-position\/\">Delete a node from linked list at a given position<\/a><\/td>\n<\/tr>\n<tr>\n<td width=\"321\"><a href=\"https:\/\/prepbytes.com\/blog\/linked-list\/remove-duplicates-from-an-unsorted-linked-list\/\">Remove duplicates from unsorted linked list<\/a><\/td>\n<td width=\"321\"><a href=\"https:\/\/prepbytes.com\/blog\/python\/python-program-to-reverse-a-linked-list\/\">Reverse a linked list in Python<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>FAQs<\/h2>\n<p><ol><strong><\/p>\n<li>What is next in the doubly linked list?<\/li>\n<p><\/strong><br \/>\nIn a doubly linked list each link consists of a link for the next link which is called Next.<br \/>\n<strong><\/p>\n<li>What function is used to remove all instances of a linked list?<\/li>\n<p><\/strong><br \/>\nUsing clear() method we can remove all elements from the linked list.<br \/>\n<strong><\/p>\n<li>What is the time complexity of deletion in doubly linked list?<\/li>\n<p><\/strong><br \/>\nThe time complexity of deletion in doubly linked list is O(n).<\/ol><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Removing occurrences in a linked list is quite different than removing occurrences through a is different. So, lets just look into the approach on how to delete all occurrences of a key in doubly linked list Problem Statement on how to delete all occurrences of a key in doubly linked list We will be given [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[125],"tags":[],"class_list":["post-4884","post","type-post","status-publish","format-standard","hentry","category-linked-list"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.8 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Delete all occurrences of a given key in a doubly linked list<\/title>\n<meta name=\"description\" content=\"Learn how to search a linked list in another linked list. 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