@spec intersperse([term()], Cldr.backend(), Keyword.t()) ::
  {:ok, [String.t()]} | {:error, {module(), String.t()}}

Intersperces a list elements into a list format according to the list pattern rules for a locale.

This function can be helpful when creating a list from Phoenix safe strings which are of the format {:safe, "some string"}.

Arguments

• list is any list of of terms

• options is a keyword list

Options

• :locale is any configured locale. See Cldr.known_locale_names/1. The default is locale: Cldr.get_locale/1.

• :format is any of those returned by Cldr.List.known_list_formats/0 or by Cldr.List.Pattern.new/1. The default is format: :standard.

Examples

iex> Cldr.List.intersperse(["a", "b", "c"], MyApp.Cldr, locale: :en)
{:ok, ["a", ", ", "b", ", and ", "c"]}

iex> Cldr.List.intersperse(["a", "b", "c"], MyApp.Cldr, locale: :en, format: :unit_narrow)
{:ok, ["a", " ", "b", " ", "c"]}

iex> Cldr.List.intersperse(["a", "b", "c"], MyApp.Cldr, locale: :fr)
{:ok, ["a", ", ", "b", " et ", "c"]}

iex> Cldr.List.intersperse([1,2,3,4,5,6], MyApp.Cldr)
{:ok, [1, ", ", 2, ", ", 3, ", ", 4, ", ", 5, ", and ", 6]}

iex> Cldr.List.intersperse(["a"], MyApp.Cldr)
{:ok, ["a"]}

iex> Cldr.List.intersperse([1,2], MyApp.Cldr)
{:ok, [1, " and ", 2]}

@spec intersperse!([term()], Cldr.backend(), Keyword.t()) ::
  [String.t()] | no_return()

Formats a list using intersperse/2 but raises if there is an error.

Examples

iex> Cldr.List.intersperse!(["a", "b", "c"], MyApp.Cldr, locale: :en)
["a", ", ", "b", ", and ", "c"]

iex> Cldr.List.intersperse!(["a", "b", "c"], MyApp.Cldr, locale: :en, format: :unit_narrow)
["a", " ", "b", " ", "c"]

Return the list of known list formats.

Example

iex> Cldr.List.known_list_formats()
[:or, :or_narrow, :or_short, :standard, :standard_narrow,
  :standard_short, :unit, :unit_narrow, :unit_short]

@spec list_formats_for(Cldr.Locale.locale_name(), Cldr.backend() | nil) ::
  [atom()] | {:error, {module(), String.t()}}

Returns the formats of list patterns available for a locale.

Returns a list of atoms of of the list formats that are available in CLDR for a locale.

Example

iex> Cldr.List.list_formats_for("en", MyApp.Cldr)
[:or, :or_narrow, :or_short, :standard, :standard_narrow,
  :standard_short, :unit, :unit_narrow, :unit_short]

@spec list_patterns_for(Cldr.Locale.locale_name(), Cldr.backend() | nil) ::
  map() | {:error, {module(), String.t()}}

Returns the list patterns for a locale.

List patterns provide rules for combining multiple items into a language format appropriate for a locale.

Example

iex> Cldr.List.list_patterns_for(:en, MyApp.Cldr)
%{
  or: %Cldr.List.Pattern{
    two: [0, " or ", 1],
    end: [0, ", or ", 1],
    middle: [0, ", ", 1],
    start: [0, ", ", 1]
  },
  or_narrow: %Cldr.List.Pattern{
    two: [0, " or ", 1],
    end: [0, ", or ", 1],
    middle: [0, ", ", 1],
    start: [0, ", ", 1]
  },
  or_short: %Cldr.List.Pattern{
    two: [0, " or ", 1],
    end: [0, ", or ", 1],
    middle: [0, ", ", 1],
    start: [0, ", ", 1]
  },
  standard: %Cldr.List.Pattern{
    two: [0, " and ", 1],
    end: [0, ", and ", 1],
    middle: [0, ", ", 1],
    start: [0, ", ", 1]
  },
  standard_narrow: %Cldr.List.Pattern{
    two: [0, ", ", 1],
    end: [0, ", ", 1],
    middle: [0, ", ", 1],
    start: [0, ", ", 1]
  },
  standard_short: %Cldr.List.Pattern{
    two: [0, " & ", 1],
    end: [0, ", & ", 1],
    middle: [0, ", ", 1],
    start: [0, ", ", 1]
  },
  unit: %Cldr.List.Pattern{
    two: [0, ", ", 1],
    end: [0, ", ", 1],
    middle: [0, ", ", 1],
    start: [0, ", ", 1]
  },
  unit_narrow: %Cldr.List.Pattern{
    two: [0, " ", 1],
    end: [0, " ", 1],
    middle: [0, " ", 1],
    start: [0, " ", 1]
  },
  unit_short: %Cldr.List.Pattern{
    two: [0, ", ", 1],
    end: [0, ", ", 1],
    middle: [0, ", ", 1],
    start: [0, ", ", 1]
  }
}

See Cldr.List.list_formats_for/2.

@spec to_string([term(), ...], Cldr.backend() | Keyword.t(), Keyword.t()) ::
  {:ok, String.t()} | {:error, {atom(), binary()}}

Formats a list into a string according to the list pattern rules for a locale.

Arguments

• list is any list of of terms that can be passed through Kernel.to_string/1.

• options is a keyword list.

Options

• :locale is any configured locale. See Cldr.known_locales(). The default is locale: Cldr.get_locale/1

• :format is any of those returned by Cldr.List.known_list_formats/0 or by Cldr.List.Pattern.new/1. The default is format: :standard.

Examples

iex> Cldr.List.to_string(["a", "b", "c"], MyApp.Cldr, locale: :en)
{:ok, "a, b, and c"}

iex> Cldr.List.to_string(["a", "b", "c"], MyApp.Cldr, locale: :en, format: :unit_narrow)
{:ok, "a b c"}

iex> Cldr.List.to_string(["a", "b", "c"], MyApp.Cldr, locale: :fr)
{:ok, "a, b et c"}

iex> Cldr.List.to_string([1,2,3,4,5,6], MyApp.Cldr)
{:ok, "1, 2, 3, 4, 5, and 6"}

iex> Cldr.List.to_string(["a"], MyApp.Cldr)
{:ok, "a"}

iex> Cldr.List.to_string([1,2], MyApp.Cldr)
{:ok, "1 and 2"}

@spec to_string!([term(), ...], Cldr.backend() | Keyword.t(), Keyword.t()) ::
  String.t() | no_return()

Formats a list using to_string/2 but raises if there is an error.

Examples

iex> Cldr.List.to_string!(["a", "b", "c"], MyApp.Cldr, locale: "en")
"a, b, and c"

iex> Cldr.List.to_string!(["a", "b", "c"], MyApp.Cldr, locale: "en", format: :unit_narrow)
"a b c"