Phone Parsing

Mix.install([
  {:jason, "~> 1.4"},
  {:kino, "~> 0.9", override: true},
  {:youtube, github: "brooklinjazz/youtube"},
  {:hidden_cell, github: "brooklinjazz/hidden_cell"}
])

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Phone Parsing

You have been provided a phone_numbers text file with all phone numbers between 555-555-0100 and 555-555-0199.

555-555-0100
555-555-0101
555-555-0102
555-555-0103
... and so on.

The following code creates the file.

file_content =
  for int <- 100..199, into: "" do
    "555-555-0#{int}\n"
  end

File.write("data/phone_numbers.txt", file_content)

You are going to read the content from the file, and convert it into a list of integers.

PhoneNumbers.get()
[5555550100, 5555550101, 5555550102, ...] # and so on.

While not strictly necessary for a file of this size, consider using File.stream!/1 or File.open/1 so that you do not need to load the entire file into memory.

Enter your solution below.

defmodule PhoneNumbers do
  def get do
  end
end

# The Following Should Return A List Of The Correct Phone Number Integers.
PhoneNumbers.get()

Mark As Completed

file_name = Path.basename(Regex.replace(~r/#.+/, __ENV__.file, ""), ".livemd")

progress_path = __DIR__ <> "/../progress.json"
existing_progress = File.read!(progress_path) |> Jason.decode!()

default = Map.get(existing_progress, file_name, false)

form =
  Kino.Control.form(
    [
      completed: input = Kino.Input.checkbox("Mark As Completed", default: default)
    ],
    report_changes: true
  )

Task.async(fn ->
  for %{data: %{completed: completed}} <- Kino.Control.stream(form) do
    File.write!(progress_path, Jason.encode!(Map.put(existing_progress, file_name, completed)))
  end
end)

form

Commit Your Progress

Run the following in your command line from the curriculum folder to track and save your progress in a Git commit. Ensure that you do not already have undesired or unrelated changes by running git status or by checking the source control tab in Visual Studio Code.

$ git checkout solutions
$ git checkout -b deprecated-phone-parsing-exercise
$ git add .
$ git commit -m "finish deprecated phone parsing exercise"
$ git push origin deprecated-phone-parsing-exercise

Create a pull request from your deprecated-phone-parsing-exercise branch to your solutions branch. Please do not create a pull request to the DockYard Academy repository as this will spam our PR tracker.

DockYard Academy Students Only:

Notify your instructor by including @BrooklinJazz in your PR description to get feedback. You (or your instructor) may merge your PR into your solutions branch after review.

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