Class: Trusty::Sorting::AtomSorter
- Inherits:
-
Object
- Object
- Trusty::Sorting::AtomSorter
- Defined in:
- lib/trusty/sorting/atom_sorter.rb
Constant Summary collapse
- LEFT_FIRST =
-1
- RIGHT_FIRST =
1
- BOTH_EQUAL =
0
- COMPARERS =
{}
- PATTERNS_RE =
/\d+(?:\.\d+){2,}|(?:(?<=^|\s)[-])?\d+(?:\.\d+)?|.+?/
- NUMERIC_RE =
/[-]?\d+(\.\d+)?/
Instance Attribute Summary collapse
-
#index ⇒ Object
readonly
Returns the value of attribute index.
-
#value ⇒ Object
readonly
Returns the value of attribute value.
Class Method Summary collapse
- .add_comparer(left_type, right_type, &comparer) ⇒ Object
- .compare_values(left_value, right_value) ⇒ Object
-
.parse(string) ⇒ Object
Loosely based on stackoverflow.com/a/4079031.
- .sort(list) ⇒ Object
Instance Method Summary collapse
- #<=>(other) ⇒ Object
-
#initialize(value, index) ⇒ AtomSorter
constructor
A new instance of AtomSorter.
Constructor Details
#initialize(value, index) ⇒ AtomSorter
Returns a new instance of AtomSorter.
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# File 'lib/trusty/sorting/atom_sorter.rb', line 22 def initialize(value, index) @value, @index = value, index end |
Instance Attribute Details
#index ⇒ Object (readonly)
Returns the value of attribute index.
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# File 'lib/trusty/sorting/atom_sorter.rb', line 20 def index @index end |
#value ⇒ Object (readonly)
Returns the value of attribute value.
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# File 'lib/trusty/sorting/atom_sorter.rb', line 20 def value @value end |
Class Method Details
.add_comparer(left_type, right_type, &comparer) ⇒ Object
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# File 'lib/trusty/sorting/atom_sorter.rb', line 58 def add_comparer(left_type, right_type, &comparer) COMPARERS[comparer_key_for(left_type, right_type)] = comparer_builder(left_type, right_type, &comparer) end |
.compare_values(left_value, right_value) ⇒ Object
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# File 'lib/trusty/sorting/atom_sorter.rb', line 33 def compare_values(left_value, right_value) if left_value.class == right_value.class left_value <=> right_value elsif comparer = COMPARERS[comparer_key_for(left_value.class, right_value.class)] comparer.call(left_value, right_value) else raise "No comparer defined for #{left_value.class} <=> #{right_value.class}" end end |
.parse(string) ⇒ Object
Loosely based on stackoverflow.com/a/4079031
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# File 'lib/trusty/sorting/atom_sorter.rb', line 44 def parse(string) string.scan(PATTERNS_RE).each_with_index.map do |atom, index| if !atom.match(NUMERIC_RE) then new(normalize_string(atom), index) elsif !atom.include?('.') then new(atom.to_i, index) elsif atom.include?('-') then new(atom.to_f, index) else new(Atoms::Version.new(atom), index) end end end |
.sort(list) ⇒ Object
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# File 'lib/trusty/sorting/atom_sorter.rb', line 54 def sort(list) list.sort_by{ |item| parse(item) } end |
Instance Method Details
#<=>(other) ⇒ Object
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# File 'lib/trusty/sorting/atom_sorter.rb', line 26 def <=>(other) other.is_a?(self.class) || raise("#{self.class} can only compare with classes of the same kind") self.class.compare_values(self.value, other.value) end |