Ruby | Set <= method

The <= is an inbuilt method in Ruby returns true if the set is a subset of the given set.

Syntax: s1_name <= s2_name

Parameters: The function takes a mandatory parameter with which it is checked for subset.

Return Value: It returns self.

Example 1:

# Ruby program to illustrate
# the <= method

# requires the set
require "set"

s1 = Set[2, 12, 78, 10, 87, 98]
s2 = Set[2, 10, 87]

# reset method used
puts s2 <= s1

Output:

true

Example 2:

# Ruby program to illustrate
# the <= method

# requires the set
require "set"

s1 = Set[2, 12, 78, 10, 87, 98]
s2 = Set[1, 2, 3]

# reset method used
puts s2 <= s1

Output:

false