RosettaCodeData/Task/XML-XPath/Lasso/xml-xpath.lasso

71 lines
1.9 KiB
Plaintext

// makes extracting attribute values easier
define xml_attrmap(in::xml_namedNodeMap_attr) => {
local(out = map)
with attr in #in
do #out->insert(#attr->name = #attr->value)
return #out
}
local(
text = '<inventory title="OmniCorp Store #45x10^3">
<section name="health">
<item upc="123456789" stock="12">
<name>Invisibility Cream</name>
<price>14.50</price>
<description>Makes you invisible</description>
</item>
<item upc="445322344" stock="18">
<name>Levitation Salve</name>
<price>23.99</price>
<description>Levitate yourself for up to 3 hours per application</description>
</item>
</section>
<section name="food">
<item upc="485672034" stock="653">
<name>Blork and Freen Instameal</name>
<price>4.95</price>
<description>A tasty meal in a tablet; just add water</description>
</item>
<item upc="132957764" stock="44">
<name>Grob winglets</name>
<price>3.56</price>
<description>Tender winglets of Grob. Just add water</description>
</item>
</section>
</inventory>
',
xml = xml(#text)
)
local(
items = #xml -> extract('//item'),
firstitem = #items -> first,
itemattr = xml_attrmap(#firstitem -> attributes),
newprices = array
)
'<strong>First item:</strong><br />
UPC: '
#itemattr -> find('upc')
' (stock: '
#itemattr -> find('stock')
')<br />'
#firstitem -> extractone('name') -> nodevalue
' ['
#firstitem -> extractone('price') -> nodevalue
'] ('
#firstitem -> extractone('description') -> nodevalue
')<br /><br />'
with item in #items
let name = #item -> extractone('name') -> nodevalue
let price = #item -> extractone('price') -> nodevalue
do {
#newprices -> insert(#name + ': ' + (decimal(#price) * 1.10) -> asstring(-precision = 2) + ' (' + #price + ')')
}
'<strong>Adjusted prices:</strong><br />'
#newprices -> join('<br />')
'<br /><br />'
'<strong>Array with all names:</strong><br />'
#xml -> extract('//name') -> asstaticarray