如何避免从字符串变量中获取重复的字符串？

Question

我有一个包含字符串值的变量serviceProvideList。

我用下面的代码分别获得每个字符串：

<xsl:variable name="tokenizedSample" select="str:tokenize($serviceProvideList,'&#xa;')"/> 

<xsl:for-each select="$tokenizedSample"> 
    <xsl:variable name="weakProvide" select="."/> 
    <xsl:variable name="tokenized" select="str:tokenize($weakProvide,' ')"/> 

    <xsl:for-each select="$tokenized"> 
    <xsl:variable name="weakP" select="."/> 
    <xsl:value-of select="$weakP"/> 
    </xsl:for-each> 
</xsl:for-each> 

如何避免在变量serviceProvideList重复值？

Answer 1

排除标记，其具有相同的值precedings，从for-each循环：

<xsl:for-each select="$tokenizedSample[ not(preceding-sibling::* = .) ]">