Method isIdentifier

MathParser/src/com/aghajari/math/Utils.java:205–214

(String text)

    }

    public static boolean isIdentifier(String text) {
        if (text == null || text.isEmpty())
            return false;
        if (!Character.isLetter(text.charAt(0)) && text.charAt(0) != '_')
            return false;
        for (int ix = 1; ix < text.length(); ++ix)
            if (!Character.isLetterOrDigit(text.charAt(ix)) && text.charAt(ix) != '_')
                return false;
        return true;
    }
}