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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