Phone Parsing

Mix.install([
  {:kino, github: "livebook-dev/kino", override: true},
  {:kino_lab, "~> 0.1.0-dev", github: "jonatanklosko/kino_lab"},
  {:vega_lite, "~> 0.1.4"},
  {:kino_vega_lite, "~> 0.1.1"},
  {:benchee, "~> 0.1"},
  {:ecto, "~> 3.7"},
  {:math, "~> 0.7.0"},
  {:faker, "~> 0.17.0"},
  {:utils, path: "#{__DIR__}/../utils"},
  {:tested_cell, git: "https://github.com/BrooklinJazz/tested_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()

Commit Your Progress

Run the following in your command line from the project folder to track and save your progress in a Git commit.

$ git add .
$ git commit -m "finish phone parsing exercise"