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Now suppose that we want to retrie ve entries from the database that satisfy certain constraints. For examp le, we might want to get all the entries of people with the position of "hacker", or we might want to get the entries of people who se fir st name is "Jane", or all the entries of peop le with salaries between 25000 and 50000, Remember our pro cedure: (de fine (filter pred 1st) (cond ((null? ist) nil) ((pred (car 1st)) (cons (car 1st) (filter pred (cdr lst)))) (else (filter pred (cdr 1st))))) Question 9: We want a way of getting entries from the database with a particular first name (where by first name, we mean the first of the "given" names, not the family name). You may assume that every entry in the database has at least one given name. You may also find the pro cedure string=?, which compares two strings, to be useful. Complete the followi ng code so that, for example, (filter (called-by "jane") sanpledat a) ;Value: ((("doe" "jane" "eli zabeth") 38000 "assist ant ")) (define (called-by name)

Now suppose that we want to retrie ve entries from the database that satisfy certain constraints. For examp le, we might want to get all the entries of people with the position of "hacker", or we might want to get the entries of people who se fir st name is "Jane", or all the entries of peop le with salaries between 25000 and 50000, Remember our pro cedure: (de fine (filter pred 1st) (cond ((null? ist) nil) ((pred (car 1st)) (cons (car 1st) (filter pred (cdr lst)))) (else (filter pred (cdr 1st))))) Question 9: We want a way of getting entries from the database with a particular first name (where by first name, we mean the first of the "given" names, not the family name). You may assume that every entry in the database has at least one given name. You may also find the pro cedure string=?, which compares two strings, to be useful. Complete the followi ng code so that, for example, (filter (called-by "jane") sanpledat a) ;Value: ((("doe" "jane" "eli zabeth") 38000 "assist ant ")) (define (called-by name)

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Now suppose that we want to retrie ve entries from the database that satisfy certain constraints. For example, we might want to get all the entries of people with the position of "hacker", or we might want to get the entries of people who se fir st name is "Jane", or all the entries of peop le with salaries bet ween 25000 and 50000. Remember our pro cedure: (de fine (filter pred 1st) (cond ((null? 1st) nil) ((pred (car 1st)) (cons (car lst) (filter pred (cdr 1st)))) (else (filter pred (cdr 1st))))) Question 9: We want a way of getting entries from the database with a particular first name (where by first name, we mean the first of the "given" names, not the family name). You may assume that every entry in the database has at lkast one given name. You may also find the pro cedure string=?, which compares two strings, to be useful. Complete the followi ng code so that, for example, (filter (called-by "jane") sanpledat a) ;Value: ((("doe" "jane" "eli zabeth") 38000 "assist ant ")) (define (called-by name)
Transcribed Image Text:Now suppose that we want to retrie ve entries from the database that satisfy certain constraints. For example, we might want to get all the entries of people with the position of "hacker", or we might want to get the entries of people who se fir st name is "Jane", or all the entries of peop le with salaries bet ween 25000 and 50000. Remember our pro cedure: (de fine (filter pred 1st) (cond ((null? 1st) nil) ((pred (car 1st)) (cons (car lst) (filter pred (cdr 1st)))) (else (filter pred (cdr 1st))))) Question 9: We want a way of getting entries from the database with a particular first name (where by first name, we mean the first of the "given" names, not the family name). You may assume that every entry in the database has at lkast one given name. You may also find the pro cedure string=?, which compares two strings, to be useful. Complete the followi ng code so that, for example, (filter (called-by "jane") sanpledat a) ;Value: ((("doe" "jane" "eli zabeth") 38000 "assist ant ")) (define (called-by name)
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