0
0

Delete article

Deleted articles cannot be recovered.

Draft of this article would be also deleted.

Are you sure you want to delete this article?

More than 1 year has passed since last update.

#Ruby でお手軽にハッシュの差分を確認するには引き算

Last updated at Posted at 2020-01-02

差分というか差分チックな。ちょっとした差を確認するならお手軽そう。

({a: 1, b: 2, c: 3}.to_a - {a: 1, b: 2, c: 3}.to_a).to_h
# => {}

({a: 1, b: 2, c: 3}.to_a - {a: 1, b: 2}.to_a).to_h
# => {:c=>3}

({a: 1, b: 2, c: 3}.to_a - {a: 1, b: 7}.to_a).to_h
# => {:b=>2, :c=>3}

# 検知できない
({a: 1, b: 2, c: 3}.to_a - {a: 1, b: 2, c: 3, d: 4}.to_a).to_h
=> {}

ちゃんと見たい場合は hashdiff gem とかで

Original by Github issue

チャットメンバー募集

何か質問、悩み事、相談などあればLINEオープンチャットもご利用ください。

Twitter

0
0
0

Register as a new user and use Qiita more conveniently

  1. You get articles that match your needs
  2. You can efficiently read back useful information
  3. You can use dark theme
What you can do with signing up
0
0

Delete article

Deleted articles cannot be recovered.

Draft of this article would be also deleted.

Are you sure you want to delete this article?