diff options
| -rw-r--r-- | src/gleam/option.gleam | 17 | ||||
| -rw-r--r-- | test/gleam/option_test.gleam | 8 |
2 files changed, 25 insertions, 0 deletions
diff --git a/src/gleam/option.gleam b/src/gleam/option.gleam index e5be4cc..663cd1f 100644 --- a/src/gleam/option.gleam +++ b/src/gleam/option.gleam @@ -68,3 +68,20 @@ pub fn from_result(result: Result(a, e)) -> Option(a) { _ -> None } } + +/// Extract the value from an option, returning a default value if there is none. +/// +/// ## Examples +/// +/// > unwrap(Some(1), 0) +/// 1 +/// +/// > unwrap(None, 0) +/// 0 +/// +pub fn unwrap(option: Option(a), or default: a) -> a { + case option { + Some(x) -> x + None -> default + } +} diff --git a/test/gleam/option_test.gleam b/test/gleam/option_test.gleam index a6f2cc3..e41c221 100644 --- a/test/gleam/option_test.gleam +++ b/test/gleam/option_test.gleam @@ -32,3 +32,11 @@ pub fn from_result_test() { option.from_result(Error("some_error")) |> should.equal(None) } + +pub fn unwrap_option_test() { + option.unwrap(Some(1), 0) + |> should.equal(1) + + option.unwrap(None, 0) + |> should.equal(0) +} |