Remove elements from a set : Set « Collections « Ruby






  1. Ruby
  2. Collections
  3. Set

Remove elements from a set


require 'set'

s = (1..3).to_set   # => #<Set: {1, 2, 3}>
s.delete 1          # => #<Set: {2, 3}>
s.delete 1          # => #<Set: {2, 3}>: unchanged
s.delete? 1         # => nil: returns nil when no change
s.delete? 2         # => #<Set: {3}>: otherwise returns set








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11.merge a range to a set
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14.Reject elements from a set
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17.Clear a set
18.Is it empty
19.Each loop
20.Map elements in a set
21.Collect in place
22.Convert set to array
23.Inspect a set
24.Compare two sets
25.Classify set elements as even or odd
26.Divide set
27.Divide with block
28.Flatten the subsets
29.Add new method to set
30.Partitioning or Classifying a Set
31.Divide a set by value
32.Divide a set by even and odd value
33.Divide a set by its element's class
34.Divide a set by absolute value
35.Divide set into three sub sets
36.Classify a set into three
37.Convert a hash to set and divide
38.Add set operation to Array
39.Sort with block
40.Set includes and membership