如何避免從字符串變量中獲取重複的字符串？

Question

我有一個包含字符串值的變量serviceProvideList。

我用下面的代碼分別獲得每個字符串：

<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> 

如何避免在變量serviceProvideList重複值？

Answer 1

排除標記，其具有相同的值precedings，從for-each循環：

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