Palindrome

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

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Palindrome

A word or sentence that reads the same way forwards and backwards is a palindrome. For example kayak and racecar are palindromes.

You’re going to create a Palindrome module which can determine if a string is a palindrome.

Palindrome.palindrome?("kayak")
true

Example Solution

defmodule Palindrome do
  def palindrome?(string) do
    string
    |> String.split("")
    |> Enum.reverse()
    |> Enum.join() == string
  end
end

Implement the Palindrome module as documented below.

defmodule Palindrome do
  @moduledoc """
  Documentation for `Palindrome`.
  """

  @doc """
  Determine if a string is a palindrome.

  ## Examples

    iex> Palindrome.palindrome?("baab")
    true

    iex> Palindrome.palindrome?("racecar")
    true

    iex> Palindrome.palindrome?("kayak")
    true

    iex> Palindrome.palindrome?("apples")
    false
  """
  def palindrome?(string) do
    String.reverse(string) == string
  end
end

Commit Your Progress

DockYard Academy now recommends you use the latest Release rather than forking or cloning our repository.

Run git status to ensure there are no undesirable changes. Then run the following in your command line from the curriculum folder to commit your progress.

$ git add .
$ git commit -m "finish Palindrome exercise"
$ git push

We’re proud to offer our open-source curriculum free of charge for anyone to learn from at their own pace.

We also offer a paid course where you can learn from an instructor alongside a cohort of your peers. We will accept applications for the June-August 2023 cohort soon.

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