module LookUpApi - nested_lookup-0.3.0 Documentation

_get(key:, document:) click to toggle source

Private method to lookup inside a document

# File lib/lookup_api.rb, line 5
def _get(key:, document:)
  if document.instance_of? Array
    document.each do |array_element|
      _get(key: key, document: array_element)
    end
  elsif document.instance_of? Hash
    document.each do |hash_key, hash_value|
      @result = hash_value if hash_key.to_s.eql?(key)
      _get(key: key, document: hash_value)
    end
  end
  # Return NIL if the key is not present in the document
  @result
end

nested_delete(key) click to toggle source

Returns a document that includes everything but the given key.

document = { a: 1, b: 2, c: 3 }
document.nested_delete('c') # => { a: 1, b: 2 }
document # => { a: 1, b: 2, c: 3 }

@param document Might be Array of Hashes (or)

Hash of Arrays (or) Hash of array of hash etc...

@param key: Key to delete

@return Result document

# File lib/lookup_api.rb, line 41
def nested_delete(key)
  # Create deep copy of the object
  temp = Marshal.load(Marshal.dump(self))
  temp.nested_delete!(key)
end

nested_delete!(key) click to toggle source

Replaces the document without the given key.

document = { a: 1, b: 2, c: 3 }
document.nested_delete!('c') # => { a: 1, b: 2 }
document # => { a: 1, b: 2 }

@param document Might be Array of Hashes (or)

Hash of Arrays (or) Hash of array of hash etc...

@param key: Key to delete

@return self

# File lib/lookup_api.rb, line 57
def nested_delete!(key)
  if instance_of? Array
    each do |array_element|
      array_element.nested_delete!(key)
    end
  elsif instance_of? Hash
    each do |hash_key, hash_value|
      if hash_key.to_s.eql?(key)
        delete(hash_key)
      else
        hash_value.nested_delete!(key)
      end
    end
  end
  self
end

nested_get(key) click to toggle source

Method to get the value from a deeply nested document

@param document Might be Array of Hashes (or)

Hash of Arrays (or) Hash of array of hash etc...

@param key: Key to lookup

@return Value if found else NULL

# File lib/lookup_api.rb, line 27
def nested_get(key)
  _get(key: key, document: dup)
end

nested_update(key:, value:) click to toggle source

Returns a document that has updated key, value pair.

document = { a: 1, b: 2, c: 3 }
document.nested_update(key: 'c', value: 4) # => { a: 1, b: 2 , c: 4}
document # => { a: 1, b: 2, c: 3 }

@param document Might be Array of Hashes (or)

Hash of Arrays (or) Hash of array of hash etc...

@param key: Key to Update @param value: Value to be updated

@return Result document

# File lib/lookup_api.rb, line 85
def nested_update(key:, value:)
  # Create deep copy of the object
  temp = Marshal.load(Marshal.dump(self))
  temp.nested_update!(key: key, value: value)
end

nested_update!(key:, value:) click to toggle source

Replaces the document with the updated key, value pair.

document = { a: 1, b: 2, c: 3 }
document.nested_update!(key: 'c', value: 4) # => { a: 1, b: 2 , c: 4}
document # => { a: 1, b: 2, c: 4 }

@param document Might be Array of Hashes (or)

Hash of Arrays (or) Hash of array of hash etc...

@param key: Key to Update @param value: Value to be updated

@return self

# File lib/lookup_api.rb, line 102
def nested_update!(key:, value:)
  if instance_of? Array
    each do |array_element|
      array_element.nested_update!(key: key, value: value)
    end
  elsif instance_of? Hash
    each do |hash_key, hash_value|
      if hash_key.to_s.eql?(key)
        self[hash_key] = value
      else
        hash_value.nested_update!(key: key, value: value)
      end
    end
  end
  self
end