文字列で並び替えるとうまくいかないので、ゼロ埋めして並び替える

versions = ["1.0.10", "1.0.9", "2.0.0", "1.0.1"]

# NG
versions.sort

# unexpected order
# => ["1.0.1", "1.0.10", "1.0.9", "2.0.0"]

converted_versions =
  versions.map do |version|
    major, minor, patch = version.split(".")
    {
      version: version,
      version_integer: format("%02d%02d%02d", major, minor, patch).to_i
    }
  end

converted_versions.sort_by { |version| version[:version_integer] }

# => [{:version=>"1.0.1", :version_integer=>10001},
#   {:version=>"1.0.9", :version_integer=>10009},
#   {:version=>"1.0.10", :version_integer=>10010},
#   {:version=>"2.0.0", :version_integer=>20000}]

# OK
converted_versions.sort_by { |version| version[:version_integer] }.map { |version| version[:version] }
# => ["1.0.1", "1.0.9", "1.0.10", "2.0.0"]

# OK
converted_versions.sort_by { |version| version[:version_integer] }.map { |version| version[:version] }.reverse
# => ["2.0.0", "1.0.10", "1.0.9", "1.0.1"]

Original by Github issue

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