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| author | Robert Peterson <robert.peterson@gmail.com> | 2019-04-16 15:23:19 -0700 |
|---|---|---|
| committer | Louis Pilfold <louis@lpil.uk> | 2019-04-17 16:12:57 +0100 |
| commit | 7275a9ef72e79bbf33a47abdb72b4596a10505d8 (patch) | |
| tree | c3e99d5fc8d705fec0a41a09d5310f0730f8fb7d /gen | |
| parent | f44fc0bae0acb01874bc8226dac6cd53f6087bff (diff) | |
| download | gleam_stdlib-7275a9ef72e79bbf33a47abdb72b4596a10505d8.tar.gz gleam_stdlib-7275a9ef72e79bbf33a47abdb72b4596a10505d8.zip | |
Add list:all
Diffstat (limited to 'gen')
| -rw-r--r-- | gen/src/list.erl | 17 | ||||
| -rw-r--r-- | gen/test/list_test.erl | 7 |
2 files changed, 22 insertions, 2 deletions
diff --git a/gen/src/list.erl b/gen/src/list.erl index b606f22..9c26eba 100644 --- a/gen/src/list.erl +++ b/gen/src/list.erl @@ -1,7 +1,7 @@ -module(list). -compile(no_auto_import). --export([length/1, reverse/1, is_empty/1, contains/2, head/1, tail/1, filter/2, map/2, traverse/2, drop/2, take/2, new/0, append/2, flatten/1, fold/3, fold_right/3, find/2]). +-export([length/1, reverse/1, is_empty/1, contains/2, head/1, tail/1, filter/2, map/2, traverse/2, drop/2, take/2, new/0, append/2, flatten/1, fold/3, fold_right/3, find/2, all/2]). length(A) -> erlang:length(A). @@ -171,3 +171,18 @@ find(Haystack, F) -> find(Rest, F) end end. + +all(List, F) -> + case List of + [] -> + true; + + [X | Rest] -> + case F(X) of + true -> + all(Rest, F); + + _ -> + false + end + end. diff --git a/gen/test/list_test.erl b/gen/test/list_test.erl index 2505a6e..adf4ea2 100644 --- a/gen/test/list_test.erl +++ b/gen/test/list_test.erl @@ -1,7 +1,7 @@ -module(list_test). -compile(no_auto_import). --export([length_test/0, reverse_test/0, is_empty_test/0, contains_test/0, head_test/0, tail_test/0, filter_test/0, map_test/0, traverse_test/0, drop_test/0, take_test/0, new_test/0, append_test/0, flatten_test/0, fold_test/0, fold_right_test/0, find_test/0]). +-export([length_test/0, reverse_test/0, is_empty_test/0, contains_test/0, head_test/0, tail_test/0, filter_test/0, map_test/0, traverse_test/0, drop_test/0, take_test/0, new_test/0, append_test/0, flatten_test/0, fold_test/0, fold_right_test/0, find_test/0, all_test/0]). length_test() -> expect:equal(list:length([]), 0), @@ -93,3 +93,8 @@ find_test() -> expect:equal(list:find([1, 2, 3], F), {ok, 4}), expect:equal(list:find([1, 3, 2], F), {ok, 4}), expect:is_error(list:find([1, 3], F)). + +all_test() -> + expect:equal(list:all([1, 2, 3, 4, 5], fun(X) -> X > 0 end), true), + expect:equal(list:all([1, 2, 3, 4, 5], fun(X) -> X < 0 end), false), + expect:equal(list:all([], fun(_) -> false end), true). |