7600aef48b
As a side benefit, fix an (non-user-visible) bug in display_s5(). Also fixed a bug where removing orphaned pages did not expire cached summary pages.
34 lines
1 KiB
Ruby
34 lines
1 KiB
Ruby
module ActiveSupport #:nodoc:
|
|
module CoreExtensions #:nodoc:
|
|
module Hash #:nodoc:
|
|
# Slice a hash to include only the given keys. This is useful for
|
|
# limiting an options hash to valid keys before passing to a method:
|
|
#
|
|
# def search(criteria = {})
|
|
# assert_valid_keys(:mass, :velocity, :time)
|
|
# end
|
|
#
|
|
# search(options.slice(:mass, :velocity, :time))
|
|
#
|
|
# If you have an array of keys you want to limit to, you should splat them:
|
|
#
|
|
# valid_keys = [:mass, :velocity, :time]
|
|
# search(options.slice(*valid_keys))
|
|
module Slice
|
|
# Returns a new hash with only the given keys.
|
|
def slice(*keys)
|
|
keys = keys.map! { |key| convert_key(key) } if respond_to?(:convert_key)
|
|
hash = self.class.new
|
|
keys.each { |k| hash[k] = self[k] if has_key?(k) }
|
|
hash
|
|
end
|
|
|
|
# Replaces the hash with only the given keys.
|
|
def slice!(*keys)
|
|
replace(slice(*keys))
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|