添加到数组循环

Question

Ruby代码是：

    a = []
    h = {}
    2.times.each do |i|
      %w(a b c).each do |x|
        h[x] = x + i.to_s
      end
      a << h
    end

结果是：

a = [{"c"=>"c1", "b"=>"b1", "a"=>"a1"}, {"c"=>"c1", "b"=>"b1", "a"=>"a1"}]

但我希望结果是：

a = [{"c"=>"c0", "b"=>"b0", "a"=>"a0"}, {"c"=>"c1", "b"=>"b1", "a"=>"a1"}]

谁可以帮助我.thx

Answer 1

在a << h之后，您必须h = {}。这是因为您要为h分配一个新对象，以便它不会覆盖以前的值。

Answer 2

[补充答案] 您熟悉functional programming的原则吗？

(0..1).map { |n| Hash[("a".."c").map { |c| [c, "#{c}#{n}"] }] }
#=> {"a"=>"a0", "b"=>"b0", "c"=>"c0"}, {"a"=>"a1", "b"=>"b1", "c"=>"c1"}]