From 3bfbe688f5a62e29835c7d3c4f282e7fff57949d Mon Sep 17 00:00:00 2001 From: Louis Pilfold Date: Thu, 18 Jan 2024 17:47:12 +0000 Subject: Rename --- .../lesson00_use/code.gleam | 38 ++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 src/content/chapter5_advanced_features/lesson00_use/code.gleam (limited to 'src/content/chapter5_advanced_features/lesson00_use/code.gleam') diff --git a/src/content/chapter5_advanced_features/lesson00_use/code.gleam b/src/content/chapter5_advanced_features/lesson00_use/code.gleam new file mode 100644 index 0000000..37624ab --- /dev/null +++ b/src/content/chapter5_advanced_features/lesson00_use/code.gleam @@ -0,0 +1,38 @@ +import gleam/io +import gleam/result + +pub fn main() { + io.debug(without_use()) + io.debug(with_use()) +} + +pub fn without_use() { + result.try(get_usename(), fn(username) { + result.try(get_password(), fn(password) { + result.map(log_in(username, password), fn(greeting) { + greeting <> ", " <> username + }) + }) + }) +} + +pub fn with_use() { + use username <- result.try(get_usename()) + use password <- result.try(get_password()) + use greeting <- result.map(log_in(username, password)) + greeting <> ", " <> username +} + +// 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