foreach element in single array in particular format

Question

I'm new to rubyonrails. I need to collect foreach element as below array format

[
  [lat1, long1],
  [lat2, long2],
  [lat3, long3],
  [lat4, long4]
]

my code is

@outlet.each do |outlets|
  lat = outlets.latitude
  long = outlets.longitude
end

i can collect lat,long every loop. How can i format those element in above format?

If these are ActiveRecord objects, you can use pluck to just fetched the attributes from the database, e.g. Outlets.where(...).pluck(:latitude, :longitude) — Stefan
– Stefan, Commented Sep 18, 2015 at 7:37

xdazz · Accepted Answer · 2015-09-18 06:30:53Z

7

Use .map method (the result is what you want):

@outlet.map do |outlets|
  [outlets.latitude, outlets.longitude]
end

answered Sep 18, 2015 at 6:30

xdazz

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4 Comments

could you please tell me, how can i render that array?

you can render the array as a json: render :json => @outlet.to_json

how do pass that format to a javascript, which is in view page?

@users4393829 <%= raw the_result_above_returned.to_json %> would do the job.

pangpang · Accepted Answer · 2015-09-18 06:40:02Z

0

You also can use inject:

@outlet.inject([]) { |sum, outlets| sum << [outlets.latitude, outlets.longitude] }

answered Sep 18, 2015 at 6:30

pangpang

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