Fjord is a set of tools for functional programming in Ruby
Add this line to your application's Gemfile:
get 'fjord'And then execute:
$ bundle
Or install it yourself as:
$ gem install fjord
Fjord provides some functional primitives such as pointfree currying and functional composition out of the box:
parse_json = -> (json) { JSON.parse(json) }
symbolize_keys = -> (hash) { hash.reduce({}) { |acc, (k, v)| acc.merge(k.to_sym => v) } }
rename_keys = curry.(-> (key_changes, hash) do
hash.reduce({}) { |acc, (k, v)|
if !key_changes[k].nil?
acc.merge(key_changes[k] => v)
else
acc.merge(k => v)
end
}
end)
prepare_params = compose.(
rename_keys.({ foo: :bar, bar: :foo}),
symbolize_keys,
parse_json,
)
params = prepare_params.(json_input)
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