Course of Raku / Essentials / Positional data types / Nested arrays

Quiz — Nested arrays

There is an array of array:

my @data =
    [1.2, 2.3, 3.4],
    [4.5, 5.6, 6.7],
    [5.6, 6.7, 7.8],
    [6.7, 7.8, 8.9];

Single elements

What do you expect to see in the output at each of the following lines of code?

5.6	say @data[1][1]; # ␣␣␣
1.2	say @data[0][0]; # ␣␣␣
7.8	say @data[2][2]; # ␣␣␣

Comparing

Select the correct Boolean result of the following comparisons.

False	`@data[0][0] == @data[2][2]` is (: False, True :)
True	`@data[1][1] == @data[2][0]` is (: False, True :)

Lengths

What value do the following calls of the size method return?

4	`@data.elems` — (: 1, 2, 3, 4, 5 :)
3	`@data[0].elems` — (: 1, 2, 3, 4, 5 :)
3	`@data[1].elems` — (: 1, 2, 3, 4, 5 :)
3	`@data[2].elems` — (: 1, 2, 3, 4, 5 :)

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