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.
Syntax: Hash.rehash()
Parameter: Hash values
Return: based on the current hash value rebuilds the hash for each key
Example #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"
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Output :
Hash a rehash form : false Hash b rehash form : false Hash c rehash form : false
Example #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"
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Output :
Hash a rehash form : {"a"=>100, "b"=>200}
Hash b rehash form : {"a"=>100}
Hash c rehash form : {"a"=>100, "c"=>300, "b"=>200}