[HN Gopher] Ruby's hash is a Swiss-army knife
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       Ruby's hash is a Swiss-army knife
        
       Author : software_writer
       Score  : 19 points
       Date   : 2023-08-20 20:36 UTC (2 hours ago)
        
 (HTM) web link (www.akshaykhot.com)
 (TXT) w3m dump (www.akshaykhot.com)
        
       | j_crick wrote:
       | It should be noted that ** operator works like .merge, and also
       | accounts for the order of key definition in a given hash
       | declaration (whatever is declared earlier gets overwritten if a
       | key with same name is used in the same hash declaration later).
        
       | block_dagger wrote:
       | Ruby's Hash is probably the handiest data structure I've ever
       | encountered. Thanks Matz.
        
         | thibaut_barrere wrote:
         | Definitely! As a matter of fact, this is the default data
         | structure I use when writing Ruby ETL code (e.g.
         | https://github.com/thbar/kiba/wiki).
         | 
         | Methods like "except" (https://docs.ruby-
         | lang.org/en/3.2/Hash.html#method-i-except) or "fetch" (raising
         | an error on missing key) are very convenient to write defensive
         | data processing code!
         | 
         | Similarly, in Elixir, I use Maps a lot for the same type of
         | jobs (https://hexdocs.pm/elixir/1.15.4/Map.html), with similar
         | properties.
        
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       (page generated 2023-08-20 23:00 UTC)