OrderedHash

A Crystal class that acts as a Hash, but remembers the order of key inserts and returns the keys in that same order.

Installation

1. Add the dependency to your shard.yml:

   dependencies:
     ordered_hash:
       github: plambert/ordered_hash.cr
   

2. Run shards install

Usage

require "ordered_hash"

hash = OrderedHash(String, String).new
hash["wednesday"] = "piano lesson"
hash["thursday"] = "guitar lesson"

hash.keys # ==> ["wednesday", "thursday"] # _always_ will return in this order!

new_hash = hash.sort
new_hash.keys # ==> ["thursday", "wednesday"] # the keys have been sorted, so will _always_ return in this order

Development

TODO: Write development instructions here

Contributing

1. Fork it (https://github.com/plambert/ordered_hash.cr/fork)
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request

Contributors

• Paul M. Lambert - creator and maintainer