Referenced from lesson Method Chaining (Spring, 2021)

You have the following functions defined below (read them carefully!):

fun is-fixed(r): r["fixed"]                 end
fun is-young(r): r["age"] < 4               end
fun nametag(r):  text(r["name"], 20, "red") end

The table t below represents four animals from the shelter:

name sex age fixed pounds

"Toggle"

"female"

3

true

48

"Fritz"

"male"

4

true

92

"Nori"

"female"

6

true

35.3

"Maple"

"female"

3

true

51.6

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

 t.order-by("age", true)

1

A

Produces a table containing only Toggle and Maple

 
 t.filter(is-fixed)

2

B

Produces a table of only young, fixed animals

 
 t.build-column("sticker", nametag)

3

C

Produces a table, sorted youngest-to-oldest

 
 t.filter(is-young)

4

D

Produces a table with an extra column, named "sticker"

 
t.filter(is-young)
  .filter(is-fixed)

5

E

Produces a table containing Maple and Toggle, in that order

 
t.filter(is-young)
  .order-by("pounds", false)

6

F

Produces a table containing the same four animals

 
t.build-column("label", nametag)
  .order-by("age", true)

7

G

Won’t run: will produce an error

 
t.order-by("sx", false)

8

H

Produces a table with an extra "label" column, sorted youngest-to-oldest

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