how can i verify if any or all elements are empty?-CodePudding

I have a hash, i want to know if any param does not exist or is empty

how is does not exist? in this case does not exist the param 'b'

 {"a"=>"first", "c"=>"5"}

and empty element is like this: "a"=>""

{"a"=>"", "b"=>"b", "c"=>"5"}

this is my attempt:

array.any?{|_,i| p i.blank?}

output:

if there is (all or any empty elements) then return true

[true, false] output true

[true, false,true] output true

[true, true] output true

[true, true, true] output true

[false, false] output false

[false, false, false] output false

CodePudding user response：

h = { "a" => "", "c" => "5" }

keys = h.keys
missed_keys = [*keys.first..keys.last] - keys

puts 'Missed Keys'
p missed_keys

puts 'Keys which are having empty values'
p h.filter_map { |k, v| k if v.empty? }

Output

Missed Keys
["b"]
Keys which are having empty values
["a"]

update: To only return true or false.

p h.any? { |k, v| v.empty? }

output

true

CodePudding user response：

I think Ruby has blank? function to do this

hash = {"a": 1, "c": ""}

def is_missing(hash, key)
  hash[key.to_sym].blank?
end

is_missing(hash, "a") => false 
is_missing(hash, "b") => true 
is_missing(hash, "c") => true