Key Concepts

Review core concepts you need to learn to master this subject

Ruby Combined Comparison Operator

Ruby Method Splat

Ruby Block Parameter

Ruby Return

Ruby Sort Method

Ruby Method Parameters & Arguments

Ruby method

Ruby Block

Ruby Combined Comparison Operator

puts "Keanu" <=> "Adrianna" # The first letters of each word are compared in ASCII order and since "K" comes after "A", 1 is printed.

puts 1 <=> 2 # -1

puts 3 <=> 3 # 0

#<=> can also be used inside of a block and to sort values in descending order:
my_array = [3, 0, 8, 7, 1, 6, 5, 9, 4]
my_array.sort! { |first_num, second_num| second_num <=> first_num }
print my_array
#Output => [9, 8, 7, 6, 5, 4, 3, 1, 0]

In Ruby, the combined comparison operator, <=>, also known as the spaceship operator is used to compare two objects. It returns 0 if the first operand equals the second, 1 if the first operand is greater than the second, and -1 if the first operand is less than the second.

Methods, Blocks, & Sorting
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