CODEWITHSUNDEEP
raku
Tinmarino
Tinmarino

Reputation: 4041

Convert a string to list of hexadecimal of each byte (Raku)

FAQ: In Raku, how to convert a string to the list of its bytes hexadecimal from (i.e. hex decoder)

Currently, I have:

say "I ❤ 🦋".encode.list.map(*.base(16));  # (49 20 E2 9D A4 20 F0 9F A6 8B)

Which is 4 operations

Upvotes: 5

Views: 346

Answers (1)

Jonathan Worthington
Jonathan Worthington

Reputation: 29454

The way in the question is pretty much fine. Since map will coerce to a list anyway, however, one can drop the explicit .list coercion, giving:

say "I ❤ 🦋".encode.map(*.base(16));

Since .base is a pure operation, it's also safe for use with the >> hyper-operator, which will also listify:

say "I ❤ 🦋".encode>>.base(16);

If I'm nitpicking a bit, note that "convert a string to the list of its bytes" is underspecified without talking about an encoding. The default is UTF-8, so encode will convert the string into that. In Raku, the byte-level representation of strings in memory is not a defined aspect of the language, and strings are an opaque data type. An implementation is free to pick whatever underlying representation it sees fit (MoarVM has at least 3 ways to model a string internally), however as the language user you don't ever get to see that.

Upvotes: 8

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