How i set variable in XSL in for - arrays

Question

Sry, when i don't i find answare, but i don't make correct question. I have APEX 4 and trying create report from multiarray select. For example data is:
Name1 Value1
Name1 Value2
Name1 Value3
Name1 Value4
Name2 Value5
Name2 Value6
Name2 Value7
and I need output in report:
-Name1
--Value1
--Value2
--Value3
--Value4
-Name2
--Value5
--Value6
--Value7
I need do it in XSL similiar as php:
$x_key= '';
foreach($arr as $key=>$value)
{
if ($x_key != $key) {
$x_key = $key;
echo "-$key\n";
}
echo "--$value\n";
}
My code possible is (but don't do it what I want):
<xsl:variable name="NAMEOLD" select="X" />
<xsl:for-each select="//ROWSET1_ROW[position()]">
<xsl:variable name="NAME" select="NAME_NUMBER" />
<xsl:choose>
<xsl:when test="NAME!=NAMEOLD">
<xsl:variable name="NAMEOLD" select="NAME" />
<fo:table-row>
<fo:table-cell xsl:use-attribute-sets="cell-transparent" >
<fo:block xsl:use-attribute-sets="align-left txt" keep-together.within-page="always">
<xsl:value-of select="NAME_NUMBER"/>
</fo:block>
</fo:table-cell>
</fo:table-row>
</xsl:when>
</xsl:choose>
<fo:table-row>
<fo:table-cell xsl:use-attribute-sets="cell-transparent" >
<fo:block xsl:use-attribute-sets="align-left txt" keep-together.within-page="always">
<xsl:value-of select="VALUE"/>
</fo:block>
</fo:table-cell>
</fo:table-row>
</xsl:for-each>
Thanks for any clue or answer
Stoupa101

Answer 1

You haven't shown your input XML. The simplest solution is along the following lines (note this requires XSLT 2.0):
<xsl:for-each-group select="ROW" group-adjacent="name">
<h1><xsl:value-of select="current-grouping-key"></h1>
<xsl:for-each select="current-group()"/>
<p><xsl:value-of select="value"/></p>
</xsl:for-each-group>
Don't try to do it the PHP way - there's no point writing low-level code when you have a high-level language.