小编Eri*_*der的帖子

我尝试编写一个简单的函数，每次调用它时都会为我提供一个随机字母，但是我很难将我的想法与函数式编程方法的概念结合起来。沿途的一些帮助将不胜感激！我的代码看起来像：

<xd:doc>
        <xd:desc>Provides one random letter, if the type is provided it returns a letter of thet type</xd:desc>
        <xd:param name="type">The type of letter to return, one of (A,a,B,b)</xd:param>
    </xd:doc>
    <xsl:function name="gdpr:randomLetter" as="xs:string">
        <xsl:param name="type" as="xs:string"></xsl:param>
        <xsl:choose>
            <xsl:when test="$type = 'A'">
                <xsl:variable name="randomNumber" select="random-number-generator()['next']?permute(1 to 7)[1]"/>
                <xsl:variable name="letters" select="('A','O','U','E','I','Y','Q')"/>
                <xsl:value-of select="$letters[$randomNumber]"/>
            </xsl:when>
            <xsl:when test="$type = 'a'">
                <xsl:variable name="randomNumber" select="random-number-generator()['next']?permute(1 to 7)[1]"/>
                <xsl:variable name="letters" select="('a','o','u','e','i','y','q')"/>
                <xsl:value-of select="$letters[$randomNumber]"/>
            </xsl:when>
            <xsl:when test="$type = 'B'">
                <xsl:variable name="randomNumber" select="random-number-generator()['next']?permute(1 to 19)[1]"/>
                <xsl:variable name="letters" select="('W','R','T','P','S','D','F','G','H','J','K','L','M','N','B','V','C','X','Z')"/>
                <xsl:value-of select="$letters[$randomNumber]"/> …