Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

feat: ✨ add examples of record pattern matching #88

Open
wants to merge 5 commits into
base: main
Choose a base branch
from
Open
Show file tree
Hide file tree
Changes from all commits
Commits
File filter

Filter by extension

Filter by extension

Conversations
Failed to load comments.
Jump to
Jump to file
Failed to load files.
Diff view
Diff view
Original file line number Diff line number Diff line change
@@ -0,0 +1,15 @@
import gleam/io

pub type Fish {
Starfish(name: String, favourite_color: String)
Jellyfish(name: String, jiggly: Bool)
}

pub fn main() {
let lucy = Starfish("Lucy", "Pink")

case lucy {
Starfish(_, favourite_color) -> io.debug(favourite_color)
Jellyfish(name, ..) -> io.debug(name)
}
}
Original file line number Diff line number Diff line change
@@ -0,0 +1,12 @@
<p>
It is possible to pattern match on a record, this allows for the extraction
of multiple field values from a record into distinct variables, similar to matching on a tuple or a list.
</p>
<p>
The let key word can only match on single variant custom types. For types with more variants
a case expression must be used.
</p>
<p>
It is possible to use underscore <code>_</code> or the spread syntax <code>..</code> to
discard fields that are not required.
Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

It would be good to explain the difference between them here, and show the difference in the code example.

</p>