哈希在Ruby on Rails中的动态循环

Question

I'm trying to create a dynamic loop within the hash @data below and can't really seem to figure it out. I'm creating an annotatedtimeline-for-rails using the google api from here https://github.com/mcommons/annotatedtimeline-for-rails .

The array within the hash @data has to be dynamic i:e the day number has to be generated by a loop and the name of the product and number are dynamic as well. I'll try to give an example in the loop below

@numdeployed is a number and comes from a table in the db i should be generated by the loop

@data{
    begin loop
    i.day.ago.to_date => { :foo=>@numdeployed, :bar=>@numdeployed, :barbaz=>@numdeployed, :foobar=>@numdeployed },
    end loop
}

The Original Data Hash looks like this

@data = {
    1.day.ago.to_date => { :foo=>10, :bar=>40, :barbaz=>10, :foobar=>40 },
    2.day.ago.to_date => { :foo=>10, :bar=>40, :barbaz=>10,:foobar=>40 },
    3.day.ago.to_date => { :foo=>10, :bar=>40, :barbaz=>10,:foobar=>40 },
    4.day.ago.to_date => { :foo=>10, :bar=>40, :barbaz=>10,:foobar=>40 },
    5.day.ago.to_date => { :foo=>10, :bar=>40, :barbaz=>10,:foobar=>40 }
}

hope someone can help. Thanks

Answer 1

Are you looking for something like this?

@data = Hash[
    n.times.map do |i|
        [ (i + 1).day.ago.to_date,  { :foo => 10, :bar => 40, :barbaz => 10, :foobar => 40 } ]
    end
]

The n is however many pairs you want in your @data .