[ruby-core:96791] [Ruby master Feature#11747] "bury" feature, similar to 'dig' but opposite
From:
from-ruby-lang@...
Date:
2020-01-11 20:44:53 UTC
List:
ruby-core #96791
Issue #11747 has been updated by cvss (Kirill Vechera).
A one-liner alternative for hash-only cases can be implemented using `Enumerable#reduce`:
```
root = {}
[:a, :b, :c].reduce(root){@1[@2]||={}}[:d] = 'E' # root => {:a=>{:b=>{:c=>{:d=>"E"}}}}
```
----------------------------------------
Feature #11747: "bury" feature, similar to 'dig' but opposite
https://bugs.ruby-lang.org/issues/11747#change-83785
* Author: dam13n (damien sutevski)
* Status: Rejected
* Priority: Normal
* Assignee: matz (Yukihiro Matsumoto)
* Target version:
----------------------------------------
In Matz's recent Rubyconf talk, he used this example for the new 'dig' feature coming in Ruby 2.3:
~~~ruby
# we want this
data[:users][0][:name]
# we can do this w/o nil errors
data.dig(:users, 0, :name)
~~~
What I'm proposing is a 'bury' feature that is the opposite of 'dig' in a sense. It inserts a value at an arbitrary depth, for example:
~~~ruby
data.bury(:users, 0, :name, 'Matz')
~~~
This will create a nested hash or an array automatically at each step if it doesn't already exist, and that can be inferred from the what the user is passing (such as a symbol or string for a hash or an integer for an array). It's similar to autovivification but more powerful!
This behavior is very common, at least in my experience, so a dry method built into Ruby would be awesome!
---Files--------------------------------
bury_examples.rb (1 KB)
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