deep_hash
deep_hash
is a Ruby gem that provides ways to deal with multi-level default hashes.
Usage
Right now the only functionality is to create such a hash. This is useful if you use multi-dimensional default hashes a lot. For example, multi-dimensional tables of counts (defaulting to 0) are often useful.
require "deep_hash"
h = Hash.deep(0) # is equivalent to
h = {}
h = Hash.deep(2) # is equivalent to
h = Hash.new { |k1, v1| k1[v1] = Hash.new { |k2, v2| k2[v2] = {} } }
h = Hash.deep(0) { "foobar" } # is equivalent to
h = Hash.new { |k, v| k[v] = "foobar" }
h = Hash.deep(1) { 0 } # is equivalent to
h = Hash.new { |k1, v1| k1[v1] = Hash.new { |k2, v2| k2[v2] = 0 } }
Installation
gem install deep_hash