Consider shapes-table below, and the four value definitions that follow.

name corners is-round

"triangle"

3

false

"square"

4

false

"rectangle"

4

false

"circle"

0

true

 
shapeA = row-n(shapes-table, 0)
shapeB = row-n(shapes-table, 1)
shapeC = row-n(shapes-table, 2)
shapeD = row-n(shapes-table, 3)

1 Match each Pyret expression (left) to the description of what it evaluates to (right).

shapeD

1

A

Evaluates to 4

shapeA

2

B

Evaluates to the last row in the table

shapeB["corners"]

3

C

Evaluates to "square"

shapeC["is-round"]

4

D

Evaluates to true

shapeB["name"]

5

E

Evaluates to false

shapeA["corners"]

6

F

Evaluates to 3

shapeD["name"] == "circle"

7

G

Evaluates to the first row in the table

2 For each value on the left, write the Pyret expression that will produce that value on the right. The first one has been completed for you.

a.

"rectangle"

shapeC["name"]

b.

"square"

c.

4

d.

0

e.

true

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