From 6e761f7041b68492030e9d27d879583993e7dd42 Mon Sep 17 00:00:00 2001 From: Danylo Negrienko Date: Sat, 29 Jun 2024 03:17:21 -0400 Subject: [PATCH] series --- elixir/series/.exercism/config.json | 27 ++++++++ elixir/series/.exercism/metadata.json | 1 + elixir/series/.formatter.exs | 4 ++ elixir/series/.gitignore | 24 ++++++++ elixir/series/HELP.md | 75 +++++++++++++++++++++++ elixir/series/README.md | 43 +++++++++++++ elixir/series/lib/string_series.ex | 12 ++++ elixir/series/mix.exs | 28 +++++++++ elixir/series/test/string_series_test.exs | 70 +++++++++++++++++++++ elixir/series/test/test_helper.exs | 2 + 10 files changed, 286 insertions(+) create mode 100644 elixir/series/.exercism/config.json create mode 100644 elixir/series/.exercism/metadata.json create mode 100644 elixir/series/.formatter.exs create mode 100644 elixir/series/.gitignore create mode 100644 elixir/series/HELP.md create mode 100644 elixir/series/README.md create mode 100644 elixir/series/lib/string_series.ex create mode 100644 elixir/series/mix.exs create mode 100644 elixir/series/test/string_series_test.exs create mode 100644 elixir/series/test/test_helper.exs diff --git a/elixir/series/.exercism/config.json b/elixir/series/.exercism/config.json new file mode 100644 index 0000000..067d65a --- /dev/null +++ b/elixir/series/.exercism/config.json @@ -0,0 +1,27 @@ +{ + "authors": [ + "DoggettCK" + ], + "contributors": [ + "amencarini", + "angelikatyborska", + "Cohen-Carlisle", + "devonestes", + "neenjaw", + "sotojuan" + ], + "files": { + "solution": [ + "lib/string_series.ex" + ], + "test": [ + "test/string_series_test.exs" + ], + "example": [ + ".meta/example.ex" + ] + }, + "blurb": "Given a string of digits, output all the contiguous substrings of length `n` in that string.", + "source": "A subset of the Problem 8 at Project Euler", + "source_url": "https://projecteuler.net/problem=8" +} diff --git a/elixir/series/.exercism/metadata.json b/elixir/series/.exercism/metadata.json new file mode 100644 index 0000000..f527dbf --- /dev/null +++ b/elixir/series/.exercism/metadata.json @@ -0,0 +1 @@ +{"track":"elixir","exercise":"series","id":"17f1138f483f482b8bb2877fbfb0f91c","url":"https://exercism.org/tracks/elixir/exercises/series","handle":"negrienko","is_requester":true,"auto_approve":false} \ No newline at end of file diff --git a/elixir/series/.formatter.exs b/elixir/series/.formatter.exs new file mode 100644 index 0000000..d2cda26 --- /dev/null +++ b/elixir/series/.formatter.exs @@ -0,0 +1,4 @@ +# Used by "mix format" +[ + inputs: ["{mix,.formatter}.exs", "{config,lib,test}/**/*.{ex,exs}"] +] diff --git a/elixir/series/.gitignore b/elixir/series/.gitignore new file mode 100644 index 0000000..346914b --- /dev/null +++ b/elixir/series/.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"). +series-*.tar + diff --git a/elixir/series/HELP.md b/elixir/series/HELP.md new file mode 100644 index 0000000..c6d6df1 --- /dev/null +++ b/elixir/series/HELP.md @@ -0,0 +1,75 @@ +# Help + +## Running the tests + +From the terminal, change to the base directory of the exercise then execute the tests with: + +```bash +$ mix test +``` + +This will execute the test file found in the `test` subfolder -- a file ending in `_test.exs` + +Documentation: + +* [`mix test` - Elixir's test execution tool](https://hexdocs.pm/mix/Mix.Tasks.Test.html) +* [`ExUnit` - Elixir's unit test library](https://hexdocs.pm/ex_unit/ExUnit.html) + +## Pending tests + +In test suites of practice exercises, all but the first test have been tagged to be 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 +``` + +If you wish to run all tests at once, you can include all skipped test by using the `--include` flag on the `mix test` command: + +```bash +$ mix test --include pending +``` + +Or, you can enable all the tests by commenting out the `ExUnit.configure` line in the file `test/test_helper.exs`. + +```elixir +# ExUnit.configure(exclude: :pending, trace: true) +``` + +## Useful `mix test` options + +* `test/.exs:LINENUM` - runs only a single test, the test from `.exs` whose definition is on line `LINENUM` +* `--failed` - runs only tests that failed the last time they ran +* `--max-failures` - the suite stops evaluating tests when this number of test failures +is reached +* `--seed 0` - disables randomization so the tests in a single file will always be ran +in the same order they were defined in + +## Submitting your solution + +You can submit your solution using the `exercism submit lib/string_series.ex` command. +This command will upload your solution to the Exercism website and print the solution page's URL. + +It's possible to submit an incomplete solution which allows you to: + +- See how others have completed the exercise +- Request help from a mentor + +## Need to get help? + +If you'd like help solving the exercise, check the following pages: + +- The [Elixir track's documentation](https://exercism.org/docs/tracks/elixir) +- The [Elixir track's programming category on the forum](https://forum.exercism.org/c/programming/elixir) +- [Exercism's programming category on the forum](https://forum.exercism.org/c/programming/5) +- The [Frequently Asked Questions](https://exercism.org/docs/using/faqs) + +Should those resources not suffice, you could submit your (incomplete) solution to request mentoring. + +If you're stuck on something, it may help to look at some of the [available resources](https://exercism.org/docs/tracks/elixir/resources) out there where answers might be found. \ No newline at end of file diff --git a/elixir/series/README.md b/elixir/series/README.md new file mode 100644 index 0000000..3740486 --- /dev/null +++ b/elixir/series/README.md @@ -0,0 +1,43 @@ +# Series + +Welcome to Series on Exercism's Elixir Track. +If you need help running the tests or submitting your code, check out `HELP.md`. + +## Instructions + +Given a string of digits, output all the contiguous substrings of length `n` in that string in the order that they appear. + +For example, the string "49142" has the following 3-digit series: + +- "491" +- "914" +- "142" + +And the following 4-digit series: + +- "4914" +- "9142" + +And if you ask for a 6-digit series from a 5-digit string, you deserve whatever you get. + +Note that these series are only required to occupy _adjacent positions_ in the input; +the digits need not be _numerically consecutive_. + +## Source + +### Created by + +- @DoggettCK + +### Contributed to by + +- @amencarini +- @angelikatyborska +- @Cohen-Carlisle +- @devonestes +- @neenjaw +- @sotojuan + +### Based on + +A subset of the Problem 8 at Project Euler - https://projecteuler.net/problem=8 \ No newline at end of file diff --git a/elixir/series/lib/string_series.ex b/elixir/series/lib/string_series.ex new file mode 100644 index 0000000..a8f2bc2 --- /dev/null +++ b/elixir/series/lib/string_series.ex @@ -0,0 +1,12 @@ +defmodule StringSeries do + @doc """ + Given a string `s` and a positive integer `size`, return all substrings + of that size. If `size` is greater than the length of `s`, or less than 1, + return an empty list. + """ + @spec slices(s :: String.t(), size :: integer) :: list(String.t()) + def slices(s, size) do + length = String.length(s) + for start <- 0..(length - size), size in 1..length, into: [], do: String.slice(s, start, size) + end +end diff --git a/elixir/series/mix.exs b/elixir/series/mix.exs new file mode 100644 index 0000000..ffda91d --- /dev/null +++ b/elixir/series/mix.exs @@ -0,0 +1,28 @@ +defmodule StringSeries.MixProject do + use Mix.Project + + def project do + [ + app: :string_series, + 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/series/test/string_series_test.exs b/elixir/series/test/string_series_test.exs new file mode 100644 index 0000000..6808eb3 --- /dev/null +++ b/elixir/series/test/string_series_test.exs @@ -0,0 +1,70 @@ +defmodule StringSeriesTest do + use ExUnit.Case + + test "slices of size 1 from one" do + assert StringSeries.slices("1", 1) == ["1"] + end + + test "slices of size 1 from two" do + assert StringSeries.slices("12", 1) == ["1", "2"] + end + + test "slices of size 1 from more" do + assert StringSeries.slices("01234", 1) == ["0", "1", "2", "3", "4"] + end + + test "slices of size 2" do + assert StringSeries.slices("35", 2) == ["35"] + end + + test "slices of size 2 overlap" do + assert StringSeries.slices("9142", 2) == ["91", "14", "42"] + end + + test "slices of size 2 from more" do + assert StringSeries.slices("01234", 2) == ["01", "12", "23", "34"] + end + + test "slices of size 3" do + assert StringSeries.slices("01234", 3) == ["012", "123", "234"] + end + + test "slices of size 4" do + assert StringSeries.slices("01234", 4) == ["0123", "1234"] + end + + test "slices include duplicates" do + assert StringSeries.slices("777777", 3) == ["777", "777", "777", "777"] + end + + test "slices of a long series" do + assert StringSeries.slices("918493904243", 5) == [ + "91849", + "18493", + "84939", + "49390", + "93904", + "39042", + "90424", + "04243" + ] + end + + test "slices same size as string" do + assert StringSeries.slices("01234", 5) == ["01234"] + end + + test "Unicode characters count as a single character" do + assert StringSeries.slices("José", 1) == ["J", "o", "s", "é"] + assert StringSeries.slices("José", 2) == ["Jo", "os", "sé"] + end + + test "slices with size longer than string return empty list" do + assert StringSeries.slices("01234", 6) == [] + end + + test "slices with size zero or negative return empty list" do + assert StringSeries.slices("01234", -1) == [] + assert StringSeries.slices("01234", 0) == [] + end +end diff --git a/elixir/series/test/test_helper.exs b/elixir/series/test/test_helper.exs new file mode 100644 index 0000000..35fc5bf --- /dev/null +++ b/elixir/series/test/test_helper.exs @@ -0,0 +1,2 @@ +ExUnit.start() +ExUnit.configure(exclude: :pending, trace: true)