Class: Array

Inherits:
Object show all
Defined in:
lib/lh/core_extensions/array/to_h.rb,
lib/lh/core_extensions/array/raise_if_empty.rb,
lib/lh/core_extensions/array/raise_if_item_nil.rb

Instance Method Summary collapse

Instance Method Details

#raise_if_empty(message = "Array must not be empty.") ⇒ Object

Raises an ArgumentError if the array is empty (contains no items at all, nil objects count as item).

Parameters:

  • message (String) (defaults to: "Array must not be empty.") —

    optional parameter that is the error message

Raises:

  • (ArgumentError) 


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# File 'lib/lh/core_extensions/array/raise_if_empty.rb', line 7

def raise_if_empty(message = "Array must not be empty.")
  raise ArgumentError.new(message) if self.empty?
end

#raise_if_item_nil(message = nil) ⇒ Object

Raises an ArgumentError if the array contains any item that is nil.

Parameters:

  • message (String) (defaults to: nil) —

    optional parameter that is the error message

See Also:



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# File 'lib/lh/core_extensions/array/raise_if_item_nil.rb', line 9

def raise_if_item_nil(message = nil)
  indices_w_nil_values = []
  each_index do |index|
    indices_w_nil_values << index if self[index].nil?
  end

  unless indices_w_nil_values.empty?
    raise ArgumentError.new(message) if message
    compiled_message = "Objects at position #{indices_w_nil_values.join(", ")} are nil"
    raise ArgumentError.new(compiled_message)
  end

end

#to_h ⇒ Object 



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# File 'lib/lh/core_extensions/array/to_h.rb', line 4

def to_h
  hash = Hash.new
  self.each_with_index do |item, index|
    hash[item] = index
  end
  hash
end