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module Jekyll
class SortedForTag < Liquid::For
def render(context)
sorted_collection = context[@collection_name].dup
sorted_collection = sorted_collection.sort_by { |i| i.to_liquid[@attributes['sort_by']] }
sorted_collection_name = "#{@collection_name}_sorted".sub('.', '_')
context[sorted_collection_name] = sorted_collection
@collection_name = sorted_collection_name
super
end
def end_tag
'endsorted_for'
end
end
end
Liquid::Template.register_tag('sorted_for', Jekyll::SortedForTag)
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