Hash#rehash() : rehash() is a Hash class method which based on the current hash value rebuilds the hash for each key. This will reindex hash if the values of key objects have changed since they were inserted.
Ruby
Output :
Ruby
Output :
Syntax: Hash.rehash() Parameter: Hash values Return: based on the current hash value rebuilds the hash for each keyExample #1 :
# Ruby code for Hash.rehash() method
# declaring Hash value
a = {a:100, b:200}
# declaring Hash value
b = {a:100, c:300, b:200}
# declaring Hash value
c = {a:100}
# rehash Value
puts "Hash a rehash form : #{a.rehash("a")}\n\n"
puts "Hash b rehash form : #{b.rehash("c")}\n\n"
puts "Hash c rehash form : #{c.rehash("a")}\n\n"
Hash a rehash form : false Hash b rehash form : false Hash c rehash form : falseExample #2 :
# Ruby code for Hash.rehash() 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}
# rehash Value
puts "Hash a rehash form : #{a.rehash()}\n\n"
puts "Hash b rehash form : #{b.rehash()}\n\n"
puts "Hash c rehash form : #{c.rehash()}\n\n"
Hash a rehash form : {"a"=>100, "b"=>200}
Hash b rehash form : {"a"=>100}
Hash c rehash form : {"a"=>100, "c"=>300, "b"=>200}