ruby - 获取 { } 大括号之间的内容

Question

如何在 Ruby 中获取“{ }”之间的内容？例如，

I love {you}

如何获取元素“you”？如果我想替换内容，比如说把“你”改成“她”，我应该怎么做？可能使用 gsub？

Answer 1

replacements = {
  'you' => 'her',
  'angels' => 'demons',
  'ice cream' => 'puppies',
}

my_string = "I love {you}.\nYour voice is like {angels} singing.\nI would love to eat {ice cream} with you sometime!"

replacements.each do |source, replacement|
  my_string.gsub! "{#{source}}", replacement
end

puts my_string
# => I love her.
# => Your voice is like demons singing.
# => I would love to eat puppies with you sometime!