Given a singly linked list L, where x and y are two data elements that occupy the nodes NODEX and NODEY with PREVIOUSX as the node, which is the previous node of NODEX, write a pseudo-code to swap the date x and y in list L by manipulating the links only (data swapping is not allowed). Assume that x and y are available in the list and are neither neighbors nor the end nodes of list L. For example, given the list L shown in Figure P6.10(a), with L, NODEX, NODEY and PREVIOUSX marked on it, the swapping should yield the list shown in Figure P6.10(b). NODEX and NODEY are neither immediate neighbors nor the end nodes of list L. a PREVIOUS X T С NODE X g W (a) Before swapping g and x NODE Y NODE Y W X PREVIOUS X NODE X ande-de-a de-a i (b) After swapping g and x H Th Figure P6.10. Swapping of elements in a singly linked list by manipulating links

Given a singly linked list L, where x and y are two data elements that occupy the nodes NODEX and NODEY with PREVIOUSX as the node, which is the previous node of NODEX, write a pseudo-code to swap the date x and y in list L by manipulating the links only (data swapping is not allowed). Assume that x and y are available in the list and are neither neighbors nor the end nodes of list L. For example, given the list L shown in Figure P6.10(a), with L, NODEX, NODEY and PREVIOUSX marked on it, the swapping should yield the list shown in Figure P6.10(b). NODEX and NODEY are neither immediate neighbors nor the end nodes of list L. a PREVIOUS X T С NODE X g W (a) Before swapping g and x NODE Y NODE Y W X PREVIOUS X NODE X ande-de-a de-a i (b) After swapping g and x H Th Figure P6.10. Swapping of elements in a singly linked list by manipulating links

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

Given a singly linked list L, where x and y are two data elements that occupy the
nodes NODEX and NODEY with PREVIOUSX as the node, which is the previous
node of NODEX, write a pseudo-code to swap the date x and y in list L by
manipulating the links only (data swapping is not allowed). Assume that x and y are
available in the list and are neither neighbors nor the end nodes of list L.
For example, given the list L shown in Figure P6.10(a), with L, NODEX,
NODEY and PREVIOUSX marked on it, the swapping should yield the list shown
in Figure P6.10(b). NODEX and NODEY are neither immediate neighbors nor the
end nodes of list L.
Th
PREVIOUS X
NODE X
‘oddada
g
c
PREVIOUS X
(a) Before swapping g and x
NODE Y
с
NODE Y
X
NODE X
addgħa
W
(b) After swapping g and x
Figure P6.10. Swapping of elements in
a singly linked list by manipulating links
i

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