Complete all steps of the Design Recipe to solve both of the problems below. We’ve provided a start to the first problem as a model.
Define a function called is-rabbit, which consumes a Row of the animals table and computes whether the animal is a rabbit. HINT: use predefined rows like rabbit-row to make your examples easier!
Contract and Purpose Statement |
Every contract has three parts…
is-rabbit::Row->Boolean
_
Examples |
Write some examples, then circle and label what changes…
examples:
is-rabbit (dog-row) is dog-row["species"] == "rabbit"
is-rabbit (rabbit-row) is rabbit-row["species"] == "rabbit"
end
Definition |
Write the definition, giving variable names to all your input values…
fun _________(_):
________________________
end
Define a function called is-lizard, which consumes a Row of the animals table and computes whether the animal is a lizard. HINT: use predefined rows like lizard-row to make your examples easier!
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
These materials were developed partly through support of the National Science Foundation, (awards 1042210, 1535276, 1648684, 1738598, 2031479, and 1501927). 
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