Data commit

Task/Set/Ruby/set.rb

@@ -0,0 +1,43 @@
+>> require 'set'
+=> true
+>> s1, s2 = Set[1, 2, 3, 4], [3, 4, 5, 6].to_set # different ways of creating a set
+=> [#<Set: {1, 2, 3, 4}>, #<Set: {5, 6, 3, 4}>]
+>> s1 | s2 # Union
+=> #<Set: {5, 6, 1, 2, 3, 4}>
+>> s1 & s2 # Intersection
+=> #<Set: {3, 4}>
+>> s1 - s2 # Difference
+=> #<Set: {1, 2}>
+>> s1.proper_subset?(s1) # Proper subset
+=> false
+>> Set[3, 1].proper_subset?(s1) # Proper subset
+=> true
+>> s1.subset?(s1) # Subset
+=> true
+>> Set[3, 1].subset?(s1) # Subset
+=> true
+>> Set[3, 2, 4, 1] == s1 # Equality
+=> true
+>> s1 == s2 # Equality
+=> false
+>> s1.include?(2) # Membership
+=> true
+>> Set[1, 2, 3, 4, 5].proper_superset?(s1) # Proper superset
+=> true
+>> Set[1, 2, 3, 4].proper_superset?(s1) # Proper superset
+=> false
+>> Set[1, 2, 3, 4].superset?(s1) # Superset
+=> true
+>> s1 ^ s2 # Symmetric difference
+=> #<Set: {5, 6, 1, 2}>
+>> s1.size # Cardinality
+=> 4
+>> s1 << 99 # Mutability (or s1.add(99) )
+=> #<Set: {99, 1, 2, 3, 4}>
+>> s1.delete(99) # Mutability
+=> #<Set: {1, 2, 3, 4}>
+>> s1.merge(s2) # Mutability
+=> #<Set: {5, 6, 1, 2, 3, 4}>
+>> s1.subtract(s2) # Mutability
+=> #<Set: {1, 2}>
+>>