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authorLouis Pilfold <louis@lpil.uk>2024-01-18 16:44:27 +0000
committerLouis Pilfold <louis@lpil.uk>2024-01-18 16:44:27 +0000
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tree165923d00aab8e7a5d5944d388dbb182c6d57b51 /src/content/chapter5_advance_features/lesson01_use_continued/code.gleam
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Last of the content!
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-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")
-}