# File lib/structures.rb, line 29 29: def ==(other) 30: other.equal?(self) || 31: (other.instance_of?(self.class) && 32: self.class::ELEMENTS.all?{ |el| self.send(el) == other.send(el)} ) 33: end
Returns the difference between two Feed instances as a hash. Any top-level differences in the Feed object as presented as:
{ :title => [content, other_content] }
For differences at the items level, an array of hashes shows the diffs on a per-entry basis. Only entries that differ will contain a hash:
{ :items => [ {:title => ["An article tile", "A new article title"]}, {:title => ["one title", "a different title"]} ]}
If the number of items in each feed are different, then the count of each is provided instead:
{ :items => [4,5] }
This method can also be useful for human-readable feed comparison if its output is dumped to YAML.
# File lib/structures.rb, line 54 54: def diff(other, elements = self.class::ELEMENTS) 55: diffs = {} 56: 57: elements.each do |element| 58: if other.respond_to?(element) 59: self_value = self.send(element) 60: other_value = other.send(element) 61: 62: next if self_value == other_value 63: 64: diffs[element] = if other_value.respond_to?(:diff) 65: self_value.diff(other_value) 66: 67: elsif other_value.is_a?(Enumerable) && other_value.all?{|v| v.respond_to?(:diff)} 68: 69: if self_value.size != other_value.size 70: [self_value.size, other_value.size] 71: else 72: enum_diffs = [] 73: self_value.each_with_index do |val, index| 74: enum_diffs << val.diff(other_value[index], val.class::ELEMENTS) 75: end 76: enum_diffs.reject{|h| h.empty?} 77: end 78: 79: else 80: [other_value, self_value] unless other_value == self_value 81: end 82: end 83: end 84: 85: diffs 86: end
Disabled; run with --debug to generate this.
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