Write stream analogues of list processing functions, Data Structure & Algorithms

 (a) Write (delay ) as a special form for (lambda () ) and (force ), as discussed in class.

(b) Write (stream-cons x y) as a special form, as discussed in class.

(c) Write stream analogues of some familiar list processing functions, including:

(stream-car str)

(stream-cdr str)

(stream-nullfi str)

(stream-ref str n) --- returns the nth

element in stream str

(stream-filter pred str)    --- makes a new stream of

elements satisfying pred

(stream-for-each proc str) --- applies proc to each

element of str for side effect

(first n str)    --- makes a stream of the

first n items in str

(list->stream lis) --- makes a stream from

list lis

(stream->list str) --- opposite coercion

For example, if you have defined a stream of even integers called evens, you can display the first 50 even integers as follows:

(stream-for-each (lambda (x) (display x)(display " ")) (first 50 evens)).

Test your functions convincingly!

(d) Now define a bunch of streams to test your functions:

(i) an infinite stream of 1's

(ii) an infinite stream of all even integers

(iii) an infinite stream of random numbers between 1 and 100

(iv) write a predicate (primefi n) that tests for primality and use it to create

 

Posted Date: 3/30/2013 3:41:17 AM | Location : United States







Related Discussions:- Write stream analogues of list processing functions, Assignment Help, Ask Question on Write stream analogues of list processing functions, Get Answer, Expert's Help, Write stream analogues of list processing functions Discussions

Write discussion on Write stream analogues of list processing functions
Your posts are moderated
Related Questions
write a c++ program to find out the area of a curve y=f(x) between x=a and x=b


I need to know about data structure and algorithms. can you help me?

How sparse matrix stored in the memory of a computer?

Simulation is the process of making an abstract model of a real world situation in order to be aware of the effect of modifications and alterations and the effect of introducing nu

Any Binary search tree has to contain following properties to be called as a red- black tree. 1. Each node of a tree must be either red or black. 2. The root node is always b

It offers an effective way to organize data while there is a requirement to access individual records directly. To access a record directly (or random access) a relationship is

Importance of Object-Oriented over java Java is basically based on OOP notions of classes and objects. Java uses a formal OOP type system that should be obeyed at compile-t

Q. Construct a binary tree whose nodes in inorder and preorder are written as follows: Inorder : 10, 15, 17, 18, 20, 25, 30, 35, 38, 40, 50 Preorder: 20, 15, 10

We have discussed that the above Dijkstra's single source shortest-path algorithm works for graphs along with non-negative edges (like road networks). Given two scenarios can emerg