diff --git a/elixir/word-count/.exercism/metadata.json b/elixir/word-count/.exercism/metadata.json new file mode 100644 index 0000000..8042c27 --- /dev/null +++ b/elixir/word-count/.exercism/metadata.json @@ -0,0 +1 @@ +{"track":"elixir","exercise":"word-count","id":"d4d0245ac687461fb69c2e536694fd0f","url":"https://exercism.io/my/solutions/d4d0245ac687461fb69c2e536694fd0f","handle":"JBiason","is_requester":true,"auto_approve":false} \ No newline at end of file diff --git a/elixir/word-count/.gitignore b/elixir/word-count/.gitignore new file mode 100644 index 0000000..63282b2 --- /dev/null +++ b/elixir/word-count/.gitignore @@ -0,0 +1,24 @@ +# The directory Mix will write compiled artifacts to. +/_build/ + +# If you run "mix test --cover", coverage assets end up here. +/cover/ + +# The directory Mix downloads your dependencies sources to. +/deps/ + +# Where third-party dependencies like ExDoc output generated docs. +/doc/ + +# Ignore .fetch files in case you like to edit your project deps locally. +/.fetch + +# If the VM crashes, it generates a dump, let's ignore it too. +erl_crash.dump + +# Also ignore archive artifacts (built via "mix archive.build"). +*.ez + +# Ignore package tarball (built via "mix hex.build"). +word_count-*.tar + diff --git a/elixir/word-count/README.md b/elixir/word-count/README.md new file mode 100644 index 0000000..41a791d --- /dev/null +++ b/elixir/word-count/README.md @@ -0,0 +1,57 @@ +# Word Count + +Given a phrase, count the occurrences of each word in that phrase. + +For example for the input `"olly olly in come free"` + +```text +olly: 2 +in: 1 +come: 1 +free: 1 +``` + +Words are compared case-insensitively. +The keys are lowercase. + +## Running tests + +Execute the tests with: + +```bash +$ mix test +``` + +### Pending tests + +In the test suites, all but the first test have been skipped. + +Once you get a test passing, you can unskip the next one by +commenting out the relevant `@tag :pending` with a `#` symbol. + +For example: + +```elixir +# @tag :pending +test "shouting" do + assert Bob.hey("WATCH OUT!") == "Whoa, chill out!" +end +``` + +Or, you can enable all the tests by commenting out the +`ExUnit.configure` line in the test suite. + +```elixir +# ExUnit.configure exclude: :pending, trace: true +``` + +If you're stuck on something, it may help to look at some of +the [available resources](https://exercism.io/tracks/elixir/resources) +out there where answers might be found. + +## Source + +This is a classic toy problem, but we were reminded of it by seeing it in the Go Tour. + +## Submitting Incomplete Solutions +It's possible to submit an incomplete solution so you can see how others have completed the exercise. diff --git a/elixir/word-count/lib/word_count.ex b/elixir/word-count/lib/word_count.ex new file mode 100644 index 0000000..8d8c031 --- /dev/null +++ b/elixir/word-count/lib/word_count.ex @@ -0,0 +1,25 @@ +defmodule WordCount do + @doc """ + Count the number of words in the sentence. + + Words are compared case-insensitively. + """ + + @spec count(String.t()) :: map + def count(sentence) do + sentence + |> String.split(~r/[ _ ]/) + |> Enum.reduce(%{}, fn (word, acc) -> + lower_word = word + |> String.downcase + |> String.replace(~r/[\$!&^%,:@]/, "") + + if String.length(lower_word) > 0 do + count = Map.get(acc, lower_word, 0) + Map.put(acc, lower_word, count + 1) + else + acc + end + end) + end +end diff --git a/elixir/word-count/mix.exs b/elixir/word-count/mix.exs new file mode 100644 index 0000000..1c5ab49 --- /dev/null +++ b/elixir/word-count/mix.exs @@ -0,0 +1,28 @@ +defmodule WordCount.MixProject do + use Mix.Project + + def project do + [ + app: :word_count, + version: "0.1.0", + # elixir: "~> 1.8", + start_permanent: Mix.env() == :prod, + deps: deps() + ] + end + + # Run "mix help compile.app" to learn about applications. + def application do + [ + extra_applications: [:logger] + ] + end + + # Run "mix help deps" to learn about dependencies. + defp deps do + [ + # {:dep_from_hexpm, "~> 0.3.0"}, + # {:dep_from_git, git: "https://github.com/elixir-lang/my_dep.git", tag: "0.1.0"} + ] + end +end diff --git a/elixir/word-count/test/test_helper.exs b/elixir/word-count/test/test_helper.exs new file mode 100644 index 0000000..35fc5bf --- /dev/null +++ b/elixir/word-count/test/test_helper.exs @@ -0,0 +1,2 @@ +ExUnit.start() +ExUnit.configure(exclude: :pending, trace: true) diff --git a/elixir/word-count/test/word_count_test.exs b/elixir/word-count/test/word_count_test.exs new file mode 100644 index 0000000..70630a4 --- /dev/null +++ b/elixir/word-count/test/word_count_test.exs @@ -0,0 +1,47 @@ +defmodule WordCountTest do + use ExUnit.Case + + test "count one word" do + assert WordCount.count("word") == %{"word" => 1} + end + + test "count one of each" do + expected = %{"one" => 1, "of" => 1, "each" => 1} + assert WordCount.count("one of each") == expected + end + + test "count multiple occurrences" do + expected = %{"one" => 1, "fish" => 4, "two" => 1, "red" => 1, "blue" => 1} + assert WordCount.count("one fish two fish red fish blue fish") == expected + end + + test "ignore punctuation" do + expected = %{"car" => 1, "carpet" => 1, "as" => 1, "java" => 1, "javascript" => 1} + assert WordCount.count("car : carpet as java : javascript!!&@$%^&") == expected + end + + test "include numbers" do + expected = %{"testing" => 2, "1" => 1, "2" => 1} + assert WordCount.count("testing, 1, 2 testing") == expected + end + + test "hyphens" do + expected = %{"co-operative" => 1} + assert WordCount.count("co-operative") == expected + end + + test "ignore underscores" do + expected = %{"two" => 1, "words" => 1} + assert WordCount.count("two_words") == expected + end + + test "normalize case" do + expected = %{"go" => 3} + assert WordCount.count("go Go GO") == expected + end + + test "German" do + expected = %{"götterfunken" => 1, "schöner" => 1, "freude" => 1} + assert WordCount.count("Freude schöner Götterfunken") == expected + end +end