Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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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.
PREVIOUS X
NODE X
PREVIOUS X
எக்க்கக்கா
எத்த்தக்க
(a) Before swapping g and x
NODE Y
NODE Y
(b) After swapping g and x
Linked Lists 193
NODE X
Figure P6.10. Swapping of elements in
a singly linked list by manipulating links
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Transcribed Image Text: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. PREVIOUS X NODE X PREVIOUS X எக்க்கக்கா எத்த்தக்க (a) Before swapping g and x NODE Y NODE Y (b) After swapping g and x Linked Lists 193 NODE X Figure P6.10. Swapping of elements in a singly linked list by manipulating links
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