Course of Raku / Advanced / Containers / Ordered containers / Exercises / Alias an array

Solution: Alias an array

Here is a possible solution to the task.

Code

my @original = 10, 20, 30;
my @alias := @original;

@original.push(40);
say @alias;

🦋 You can find the source code in the file alias-an-array.raku.

Output

[10 20 30 40]

Comments

The binding @alias := @original makes @alias another name for the same array container, rather than a copy of it.
The change is made through @original this time, and it is a structural one — push adds an element. Because both names are the very same container, @alias sees the new element too. The two names are completely interchangeable: it does not matter which one you use to read or to modify the array.

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