a/an ( word -- article )
English natural language transformations

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Next:	?plural-article ( word -- article )

Vocabulary
english

Inputs

word

a string

Outputs

article

"a" or "an"

Word description
Gives the proper indefinite singular article (a or an) for the word. For words which begin with a vowel sound, an is used, whereas a is used for words which begin with a consonant sound.

Notes
The output does not contain the input. The output of this word is always a singular article, regardless of the plurality of the input.

Examples

USING: english kernel combinators sequences io ; "object" [ a/an ] keep " " glue print
an object

See also
?plural-article, a10n, comma-list

Definition

USING: kernel sequences ;

IN: english

: a/an ( word -- article )
    [ first ] [ length ] bi 1 = "afhilmnorsx" vowels ? member?
    "an" "a" ? ;