How to resolve the algorithm Queue/Usage step by step in the Lambdatalk programming language

Published on 12 May 2024 09:40 PM
#Lambdatalk

How to resolve the algorithm Queue/Usage step by step in the Lambdatalk programming language

Table of Contents

Problem Statement

Create a queue data structure and demonstrate its operations. (For implementations of queues, see the FIFO task.)

Operations:

Let's start with the solution:

Step by Step solution about How to resolve the algorithm Queue/Usage step by step in the Lambdatalk programming language

Source code in the lambdatalk programming language

{def queue.add 
 {lambda {:v :q}
  {let { {_ {A.addlast! :v :q}}}
       } ok}}
-> queue.add

{def queue.get 
 {lambda {:q} 
  {let { {:v {A.first :q}} 
         {_ {A.subfirst! :q}} 
       } :v}}}
-> queue.get

{def queue.empty?
 {lambda {:q}
  {A.empty? :q}}}
-> queue.empty?

{def Q {A.new}}    -> Q      []
{queue.add 1 {Q}}  ->  ok    [1]
{queue.add 2 {Q}}  ->  ok    [1,2]
{queue.add 3 {Q}}  ->  ok    [1,2,3]
{queue.get {Q}}    -> 1      [2,3]
{queue.add 4 {Q}}  ->  ok    [2,3,4]
{queue.empty? {Q}} -> false
{queue.get {Q}}    -> 2      [3,4]
{queue.get {Q}}    -> 3      [4]
{queue.get {Q}}    -> 4      []
{queue.get {Q}}    -> undefined
{queue.empty? {Q}} -> true

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