hex-digit? ( ch -- ? )

Vocabulary

hex-strings

Inputs

ch	a character

Outputs

?

a boolean

Word description

Checks if a digit is in hexadecimal format, e.g. a-f A-F and 0-9

Examples

USING: hex-strings prettyprint ; CHAR: a hex-digit? .
t

USING: hex-strings prettyprint ; CHAR: z hex-digit? .
f

Definition

USING: combinators.short-circuit math.order ;

IN: hex-strings

: hex-digit? ( ch -- ? )
    {
        [ 65 70 between? ]
        [ 97 102 between? ]
        [ 48 57 between? ]
    } 1|| ;