Ruby | Set proper_subset?() function
Last Updated :
07 Jan, 2020
The proper_subset? is an inbuilt method in Ruby that returns true if a set if a proper subset of another set. If it is not a proper subset, then it returns false.
Syntax: s1.name.proper_subset?(s2.name)
Parameters: The function does not takes any parameter.
Return Value: It returns true if set s1 is a proper subset of s2, else it returns false.
Example 1:
require "set"
s1 = Set[ 1 , 2 ]
s2 = Set[ 1 , 2 , 3 ]
puts s1.proper_subset?(s2)
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Output:
true
Example 2:
require "set"
s1 = Set[ 1 , 5 ]
s2 = Set[ 1 , 2 , 3 ]
puts s1.proper_subset?(s2)
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Output:
false
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