CODEWITHSUNDEEP
ruby-on-railsruby
Dung Nguyen quang
Dung Nguyen quang

Reputation: 135

Get all item be created in loop, ruby on rails

Can I get all items been created in loop with ruby on rails?? Here my example:

@fb_data_hash = {:key1 => value1, :key2 => value2, :key3 => value3, ...}
@fb_data_hash.each do |key, val|
timeline = get_id_and_content(key, val)
  #timeline will be created like this:
    =>first:  timeline = {:id => "1", :content => "abcd"}
    =>second:  timeline = {:id => "2", :content => "efgh"}
    =>third:  timeline = {:id => "3", :content => "ijkl"}
end

So, I want to get all timeline each time it been created, like this:

alltimelines = [{:id => "1", :content => "abcd"},{:id => "2", :content => "efgh"},{:id => "3", :content => "ijkl"}]

<=>

alltimelines = [timeline(first),timeline(second),timeline(third)]

But, I don't know how to do that, I tried create an array like this:

alltimelines = Array.new
alltimelines << timeline

but, it just get one timeline in first. Please help me :)

Upvotes: 0

Views: 88

Answers (3)

Mohammad AbuShady
Mohammad AbuShady

Reputation: 42869

You could simply use Enumerable#collect which will return a new array by running a block on each item of the enumerable, but also it won't destroy or modify the old variable

timeline = @fb_data_hash.collect { |key, val| get_id_and_content(key, val) }
# @fb_data_hash is still intact
# timeline has the data that you want

Upvotes: 1

Kilian
Kilian

Reputation: 579

If you really want this format with an array like:

all_timelines = [{:id => "1", :content => "abcd"},{:id => "2", :content => "efgh"},{:id => "3", :content => "ijkl"}]

This code should do the trick (assuming the fact that @fb_data_hash actually contains data) :

all_timelines = Array.new
@fb_data_hash.each do |key, val|
  all_timelines.push({:id => key, :content => val})
end

Then you can call your array like that (as an exemple)

all_timelines.first # return {:id=>1, :content=>"abcd"}

Hope that is you are looking for.

Upvotes: 0

Jesper
Jesper

Reputation: 4555

You can use map for this purpose

some_hash = { key: "value", other_key: "other_value" }
some_hash.map do |key, val|
  get_id_and_content(key, val)
end
# => equivalent to [ get_id_and_content(:key, "value"), get_id_and_content(:other_key, "other_value") ]

Upvotes: 2

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