SICP Chapter 1:3:1

Brian.Mumo — Thu, 14 Sep 2023 10:07:46 +0000

Procedures as Arguments
Its a pseudo-revamp or alternative approach to the examples and some exercises in the book

Addition via linear recursion

(define (sum a b)
(if (> a b)
0
(+ a (sum(+ a 1) b))))

Approach 2 of addition via linear recursion
(define (sum-int a b)
(define (inc n )(+ n 1))
(if (> a b)
0
(+ a (sum-int (inc a) b))))

Addition of cubes via linear recursion
(define (sum-cubes a b)
(define (cube z)(* z z z ))
(if (> a b)
0
(+ (cube a)(sum-cubes(+ a 1) b))))

Approach 2 of addition of cubes via linear recursion

(define (sum-cubes a b)
(define (cube z)(* z z z))
(define (inc n)(+ n 1))
(if (> a b)
0
(+ (cube a)(sum-cubes (inc a) b))))

Approach of sequential sum

(define (sum-pi a b)
(if (= a 0)
"null"
(if (> a b)
0
(+ (/ 1.0 (* a(+ a 2)))(sum-pi (+ a 4) b)))))

Approach of exercise 1.30 Additions via iteration

(define (sum a b)
(define (next n)(+ n 1))
(define (iter a result)
(if (> a b)
result
(iter (next a)(+ result (next a)))))
(iter a 0))

Approach to exercise 1.31 Factorial via iteration

(define (Product a b)
(define (next n)(+ n 1))
(define (iter a result)
(if (> a b)
result
(iter (next a)(* result (next a)))))
(iter a 0))

Season 1 Episode 1

Brian.Mumo — Fri, 01 Sep 2023 17:55:12 +0000

Perfection vs Productivity

Reading this book has not been a walk in the park ,it's more of a walk in a landmine , from learning the centenarian language of lisp , to creating procedures to attempt the examples at the end of the subchapters, but looking at it now I was working with a
an unrealistic "Perfection " mindset .

Perfection is akin to infinity the move you strive the harder it gets to attain it.

Soon after I came across this quote ::

"Everyday it get's easier but you have to do it everyday that's the hard part" ~ BojackHorseman

Having a perfection mindset was leading (Recursively) me to the same wall of wanting to exceed an unattainable goal and it led me to states of inaction .

Adopting the Pomodoro Technique and having a continuous improvement mindset has largely helped me remain consistent and "loyal" to the course

To my fellow developers reading this resilience and consistency is more important than perfection.

DEV Community: Brian.Mumo

SICP Chapter 1:3:1

Season 1 Episode 1