Add to Array Loop

Question

Ruby code is：

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

the result is:

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

but i hope the result is:

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

who can help me.thx

LanguagesNamedAfterCofee · Accepted Answer · 2012-06-28 03:00:32Z

2

After a << h you have to do h = {}. This is because you are assigning a new object to h so that it doesn't override the previous values.

answered Jun 28, 2012 at 3:00

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Comments

tokland · Accepted Answer · 2012-06-28 12:19:58Z

0

[Complementary answer] Are you familiar with the principles of functional programming?

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

answered Jun 28, 2012 at 12:19

tokland

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