August 2015
Intermediate to advanced
216 pages
4h 50m
English
Content preview from Clojure Data Structures and Algorithms CookbookBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 2. Alternative Linked Lists
In this chapter, we will discuss the following recipes, related to linked lists:
- Building a doubly linked XOR list
- Speeding up access to linked list elements
- Building a simple shift-reduce parser
- Implementing a skew binary random-access list
Building a doubly linked XOR list
In a linked list, we chain elements to the next occurring item by storing a reference in each element. Hence, you can only walk linked lists in a single direction, accessing at each step the information about where to look for the next cell. Take the example of Clojure, where seq is implemented as a linked list. Here, to walk this data structure, you can only call rest to access tail elements, and you have no means of moving backwards.
One way ...
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