From 29da9b51c0d918b86108bdbf0f4c6e914b240283 Mon Sep 17 00:00:00 2001 From: Louis Pilfold Date: Thu, 11 Jan 2024 18:25:46 +0000 Subject: Advanced features --- .../lesson01_use_continued/code.gleam | 30 ++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 src/content/chapter5_advance_features/lesson01_use_continued/code.gleam (limited to 'src/content/chapter5_advance_features/lesson01_use_continued/code.gleam') diff --git a/src/content/chapter5_advance_features/lesson01_use_continued/code.gleam b/src/content/chapter5_advance_features/lesson01_use_continued/code.gleam new file mode 100644 index 0000000..ac61062 --- /dev/null +++ b/src/content/chapter5_advance_features/lesson01_use_continued/code.gleam @@ -0,0 +1,30 @@ +import gleam/io +import gleam/result + +pub fn main() { + let x = { + use username <- result.try(get_usename()) + use password <- result.try(get_password()) + use greeting <- result.map(log_in(username, password)) + greeting <> ", " <> username + } + + case x { + Ok(greeting) -> io.println(greeting) + Error(error) -> io.println_error(error) + } +} + +// Here are some pretend functions for this example: + +fn get_usename() { + Ok("alice") +} + +fn get_password() { + Ok("hunter2") +} + +fn log_in(_username: String, _password: String) { + Ok("Welcome") +} -- cgit v1.2.3