OpenStruct#delete_field

delete_field(name) { || ... }

# File tmp/rubies/ruby-3.4.1/lib/ostruct.rb, line 371
def delete_field(name, &block)
  sym = name.to_sym
  begin
    singleton_class.remove_method(sym, "#{sym}=")
  rescue NameError
  end
  @table.delete(sym) do
    return yield if block
    raise! NameError.new("no field '#{sym}' in #{self}", sym)
  end
end

Removes the named field from the object and returns the value the field contained if it was defined. You may optionally provide a block. If the field is not defined, the result of the block is returned, or a NameError is raised if no block was given.

Example

require "ostruct"

person = OpenStruct.new(name: "John", age: 70, pension: 300)

person.delete_field!("age")  # => 70
person                       # => #<OpenStruct name="John", pension=300>

Setting the value to nil will not remove the attribute:

Example

person.pension = nil
person                 # => #<OpenStruct name="John", pension=nil>

person.delete_field('number')  # => NameError

person.delete_field('number') { 8675_309 } # => 8675309

See also #as_json #dig #[]= #each_pair also in 3.3 · 3.2 · 3.1 · 3.0

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