Referenced from lesson Defining Table Functions

For the word problems below, assume animalA and animalB are defined as the data rows for Felix and Midnight, respectively.

Directions: Define a function called is-cat, which consumes a Row of the animals table and computes whether the animal is a cat.

Contract and Purpose Statement

Every contract has three parts…​

# is-cat::(r :: Row)->Boolean

# Consumes an animal, and computes whether the species equals "cat"

Examples

Write some examples, then circle and label what changes…​

examples:

__is-cat (animalA)is ___________________________

________ (_______)is ___________________________

end

Definition

Write the definition, giving variable names to all your input values…​

fun is-cat(r):

__r["species"] == "cat"

end

Directions: Define a function called is-young, which consumes a Row of the animals table and computes whether it is less than four years old.

Contract and Purpose Statement

Every contract has three parts…​

# ________::____________________->_______

# ________________________________________________________________

Examples

Write some examples, then circle and label what changes…​

examples:

__________ (_________)is __________________

__________ (_________)is __________________

end

Definition

Write the definition, giving variable names to all your input values…​

fun ________(_):

______________

end

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