method

index_with

v6.0.0 - Show latest stable - 0 notes - Class: Enumerable

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What's this?

index_with(default = INDEX_WITH_DEFAULT) public

Convert an enumerable to a hash keying it with the enumerable items and with the values returned in the block.

post = Post.new(title: "hey there", body: "what's up?")

%i( title body ).index_with { |attr_name| post.public_send(attr_name) }
# => { title: "hey there", body: "what's up?" }

Show source

# File activesupport/lib/active_support/core_ext/enumerable.rb, line 70
  def index_with(default = INDEX_WITH_DEFAULT)
    if block_given?
      result = {}
      each { |elem| result[elem] = yield(elem) }
      result
    elsif default != INDEX_WITH_DEFAULT
      result = {}
      each { |elem| result[elem] = default }
      result
    else
      to_enum(:index_with) { size if respond_to?(:size) }
    end
  end

index_with

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