ruby - Ruby 变量循环的 DRY

Question

我有一个像下面这样的 ruby​​ 定义。我可以做些什么让它变干吗？喜欢:

[e,t,l,te,le,le].each |xxx| do
  if xxx
end

这意味着为“变量”做循环，而不仅仅是“枚举器”。

代码:

def findLogs (obj)
  if e=obj['E']
    e=obj['E']['pkg'] ? "@E = #{obj['E']['pkg']},":nil
  else nil
  end
  if t=obj['T']
    t=obj['T']['pkg'] ? "@T = #{obj['T']['pkg']},":nil
  else nil
  end
  if l=obj['L']
    l=obj['L']['pkg'] ? "@L = #{obj['L']['pkg']},":nil
  else nil
  end
  if te=obj['Te']
    te=obj['Te']['pkg'] ? "@Te = #{obj['Te']['pkg']},":nil
  else nil
  end
  if le=obj['Le']
    le=obj['Le']['pkg'] ? "@Le = #{obj['Le']['pkg']},":nil
  else nil
  end
end

Answer 1

e, t, l, te, le = %w|E T L Te Le|.map do |s|
  obj[s] && obj[s]['pkg'] ? "@#{s} = #{obj[s]['pkg']}," : nil
end

---

对于塞尔吉奥·图伦采夫:

b = binding
%w|E T L Te Le|.each do |s|
  b.local_variable_set(
    s.downcase.to_sym,
    obj[s] && obj[s]['pkg'] ? "@#{s} = #{obj[s]['pkg']}," : nil
  )
end