Ruby | Hash select() method

Hash#select() : select() is a Hash class method which finds the array from the hash based on the block condition.

Syntax: Hash.select()

Parameter: Hash values
block condition

Return: array from the hash based on the block condition.

Example #1 :

# Ruby code for Hash.select() method

# declaring Hash value
a = { "a" => 100, "b" => 200 }

# declaring Hash value
b = {"a" => 100}

# declaring Hash value
c = {"a" => 100, "c" => 300, "b" => 200}


# select Value
puts "Hash a select form : #{a.select {|key, value| key < "b"}}\n\n"

Output :

Hash a select form : {"a"=>100}

Example #2 :

# Ruby code for Hash.select() method

# declaring Hash value
b = {"a" => 100}

# declaring Hash value
c = {"a" => 100, "c" => 300, "b" => 200}


# select Value

puts "Hash b select form : #{b.select{|key, value| value < 200}}\n\n"

puts "Hash c select form : #{c.select{|key, value| key < "b"}}\n\n"

Output :

Hash b select form : {"a"=>100}

Hash c select form : {"a"=>100}