Ruby | Hash fetch_values() function
Hash#fetch_values() is a Hash class method which returns array containing the values associated with the given keys. With no other arguments, it will raise a KeyError exception.
Syntax: Hash.fetch_values()
Parameter: Hash values
Return: array containing the values associated with the given keys
Example #1 :
# Ruby code for Hash.fetch_values() method # declaring Hash value a = { "a" => 100, "b" => 200 } # declaring Hash value b = {"a" => 100} # block condition # fetch? Value puts "Hash a fetch_values form : #{a.fetch_values("x"){|k| k.upcase}}\n\n" |
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filter_none
Output :
Hash a fetch_values form : ["X"]
Example #2 :
# Ruby code for Hash.fetch_values() 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} # fetch_values Value puts "Hash a fetch_values form : #{a.fetch_values("a")}\n\n" puts "Hash b fetch_values form : #{b.fetch_values("a")}\n\n" puts "Hash c fetch_values form : #{c.fetch_values("b")}\n\n" |
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filter_none
Output :
Hash a fetch_values form : [100] Hash b fetch_values form : [100] Hash c fetch_values form : [200]
