Feature #18279: ENV.merge! support multiple arguments as Hash.merge!

• Status: Closed
• Assignee: matz (Yukihiro Matsumoto)
• Target version: -

[zw963 (Wei Zheng)]

I give a useful example for this.

require 'yaml'
env_files = ['config.yml', 'config.local']
envs = env_files.filter_map {|file| YAML.load_file(file)['env'] if File.file?(file) }
ENV.merge!(*envs) # Raise wrong number of arguments (given 2, expected 1)

For now, above code have do like this in ruby 3.0.2

ENV.merge!({}.merge!(*envs))

[zw963 (Wei Zheng)]

• Subject changed from ENV.merge! support multile arguments as hash. to ENV.merge! support multile arguments as Hash.merge!
• Description updated (diff)

[ko1 (Koichi Sasada)]

• Status changed from Open to Assigned
• Assignee set to matz (Yukihiro Matsumoto)

Hash#merge!(*other) accepts multiple values, so I think it is acceptable.

Matz, how about it?

[nobu (Nobuyoshi Nakada)]

• Subject changed from ENV.merge! support multile arguments as Hash.merge! to ENV.merge! support multiple arguments as Hash.merge!

https://github.com/ruby/ruby/pull/5207

[matz (Yukihiro Matsumoto)]

Accepted.

Matz.

[nobu (Nobuyoshi Nakada)]

• Status changed from Assigned to Closed

Applied in changeset git|278fefb96294adf9d27a78f919c714a31b65ef58.

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ENV.merge! support multile arguments [Feature #18279]