Ruby » Ruby master

Feature #18617

Updated by hsbt (Hiroshi SHIBATA) about 2 years ago

# Abstract 

 Since is very common the hash nested hashes, expecialy in the API world, I whold love to use Hash#[] syntax as alias for Hash#dig. 

 # Background 

 Since a start to learn ruby, Hashes are the most powerful structure I can use to build API. It's intuitive and concise way to represent data. 
 But something always make me unconfortable, the excess of square brackets([]) to access nested data. 
 Everytime is a "nasty", to access things like  
 ``` ruby 
 purchase[:customer][:addresses][:delivery][:street] 
 ``` 
 even worse when data is missing anypoint. 
 So, I meet the Hash#dig. Wonderful, easy, and powerful as well. 

 But .dig is not so intuitive, and I think, why not use the most common way to access data with multiple keys.  
 Why not use the most powerful method, with all powerfulness. 
 Why limitate Hash#[] to one single param. :(  

 # Proposal 

 So, my proposal is to allow Hash#[] to take undefinily params, and act like .dig, more concise to access nested data, more powerful, more happy :D. 

 **Stop:** 
 ``` ruby 
 hash[:a][:b][:c][:d][:e][:f][:u] 
 ```  

 **Just:** 

 ``` ruby 
 hash[:a, hsh[:a, :b, :c, :d, :e, :lov, :u] 
 ```  

 # Implementation 

 Since Hash#[] and Hash.dig, both calling Hash::new when key is not found, just check the arity for performance. 
 Currently, I use something like: 

 ``` ruby 
 module AwesoneAccess 
   def [] *keys 
     if keys.many? 
       dig *keys 
     else 
       super 
     end 
   end 
 end 

 class Hash 
   prepend AwesoneAccess 
 end 

 a = {foo: {bar: :baz}} # => { foo: { bar: :baz } 

 a[:foo][:bar] == a[:foo, :bar] # => true 
 ``` 
 

 # Evaluation 

 It'll be awesome. (ﾉ◕ヮ◕)ﾉ*:･ﾟ✧ ✧ﾟ･: *ヽ(◕ヮ◕ヽ) 

 # Discussion 

 I would love listen you guys. 
 Sincerely...ಥ_ಥ 

 # Summary 

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