I am trying to work with a nested hash. I have a deck of cards represented as follows: deck_of_cards = { :hearts => {:two => 2, :three => 3, :four => 4, :five => 5, :six => 6, :s...

I'm trying to build an API wrapper gem, and having issues with converting hash keys to a more Rubyish format from the JSON the API returns. The JSON contains multiple layers of nesting, both Hashe...

I'm looking for a good way to avoid checking for nil at each level in deeply nested hashes. For example: name = params[:company][:owner][:name] if params[:company] && params[:company][:own...

I want to store multiple keys with a single value using jedis (Redis cache) with Java. I have three keys like user_1, driver_10, admin_5 and value = this is user, and I want to get value by using a...

I have a hash like: h = {'name' => 'sayuj', 'age' => 22, 'project' => {'project_name' => 'abc', 'duration' => 'prq'}} I need a dup of this hash, the change should not affect...

Is there any way simpler than if hash.key?('a') hash['a']['b'] = 'c' else hash['a'] = {} hash['a']['b'] = 'c' end

Given a hash such as: AppConfig = { 'service' => { 'key' => 'abcdefg', 'secret' => 'secret_abcdefg' }, 'other' => { 'service' => { 'key' => 'cred_abcdefg', 'secret'...

I'm working a little utility written in ruby that makes extensive use of nested hashes. Currently, I'm checking access to nested hash elements as follows: structure = { :a => { :b => '...

What's the most concise way to determine if @hash[:key1][:key2] is defined, that does not throw an error if @hash or @hash[:key1] are nil? defined?(@hash[:key1][:key2]) returns True if @hash...

I have a Perl hash of hashes of ... around 11 or 12 elements deep. Please forgive me for not repeating the structure below! Some of the levels have fixed labels, e.g. 'NAMES', 'AGES' or similar so...

I have a json structure that I'm decoding that looks like this: person => { city => "Chicago", id => 123, name => "Joe Smith", pets => { cats => [ { age => 6, name =&gt...

How am I able to create a hash within a hash, with the nested hash having a key to indentify it. Also the elements that I create in the nested hash, how can I have keys for them as well for exampl...

I have a hash of hashes, like so: %hash = ( a => { b => 1, c =>2, d => 3}, a1 => { b => 11, c =>12, d => 13}, a2 => { b => 21, c =>22, d => 23} ) I want to extract the "b" element and put it ...

Creating hashes of hashes in Ruby allows for convenient two (or more) dimensional lookups. However, when inserting one must always check if the first index already exists in the hash. For example: ...