Consider the database example of section 12.1. Write a function, find, to return all records that have a given value particular value for a particular field. To make this more interesting, allow users...

Consider the database example of section 12.1. Write a function, find, to return all records that have a given value particular value for a particular field. To make this more interesting, allow users to specify the fields to be searched by name. For example, evaluating the expression:

(find ‘salary-field ‘50000.00

‘(((Alan Turing) 50000.00 135772)

((Ada Lovelace) 45000.00 338519)))

should return:

((Alan Turing) 50000.00 135772)