Difference between revisions of "Dynamic Spreadsheet Assignment"

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Line 78: Line 78:
 
==row-count==
 
==row-count==
 
  (define (row-count sheet)
 
  (define (row-count sheet)
         (error 'not-yet-implemented))  
+
         (error 'not-yet-implemented))
 +
 
 +
('''row_count''' hockey-spreadsheet) evaluates to '''4'''
  
 
==row-at==
 
==row-at==

Revision as of 14:03, 30 March 2022

Motivation

Code To Use

general

void

number

string

list

Code To Implement

For clarity, we will provide what select functions evaluate to for this spreadsheet:

Name Uniform Number Birth Year Games Played Goals Assists
Bobby Orr 4 1948 657 270 645
Wayne Gretzky 99 1961 1487 894 1963
Mario Lemieux 66 1965 915 690 1033


file: src/main/racket/spreadsheet/spreadsheet.rkt Racket-logo.svg
functions: string->cell
csv->spreadsheet
row-count
row-at sheet
sum-row

string->cell

(define (string->cell s)
       (error 'not-yet-implemented))
  • if s is the empty string, evaluate to void
  • if s represents a number, evaluate to that number
  • if s starts with "(" and ends with ")", evaluate to a form suited for eval
  • otherwise, evaluate to s

csv->spreadsheet

(define (csv->spreadsheet matrix)
       (error 'not-yet-implemented))

given a list of lists of strings, evaluate to a list of list of cells using #string->cell and a couple of list higher order functions.

row-count

(define (row-count sheet)
       (error 'not-yet-implemented))

(row_count hockey-spreadsheet) evaluates to 4

row-at

(define (row-at sheet row-index)
       (error 'not-yet-implemented)) 

sum-row

(define (sum-row sheet row-index)
       (error 'not-yet-implemented))

Test

file: spreadsheet_test.rkt Racket-logo.svg Test
source folder: src/test/racket/spreadsheet

note: ensure that you have removed all printing to receive credit for any assignment.