CODEWITHSUNDEEP
rubyjsonhash
Abdul Baig
Abdul Baig

Reputation: 3721

DRY: minimizing code

I want a method to create the following json string in many places:

{"daily_calendar":{"search":{"print_date":"2014-06-30"}}}

I have following four lines of code to make the hash:

custom_params, print_date, search = Hash.new, Hash.new, Hash.new
print_date['print_date'] =  @week_day
search['search'] = print_date
custom_params['daily_calendar'] = search
puts custom_params.to_json

What is the best way to do it in one or two lines and use it anywhere in the controller?

Upvotes: 1

Views: 62

Answers (4)

Cary Swoveland
Cary Swoveland

Reputation: 110675

A recursive expression allows you to have any number of nested hashes:

def doit(*h,v)
  h.size == 1 ? { h.first => v } : { h.shift => doit(*h,v) }
end

h = %w[one_more_level daily_calendar search print_date]
doit(*h, 'tue')     
  #=> {"one_more_level"=>{"daily_calendar"=>{"search"=>{"print_date"=>"tue"}}}}

Upvotes: 1

infused
infused

Reputation: 24337

{daily_calendar: {search: {print_date: @week_day}}}.to_json

Upvotes: 1

Arie Xiao
Arie Xiao

Reputation: 14082

Just write as it is:

hash = {daily_calendar: {search: {print_date:@week_day} } }
puts hash.to_json

Upvotes: 2

Ry-
Ry-

Reputation: 224903

You can use hash literals:

custom_params = {
    "daily_calendar" => {
        "search" => {
            "print_date" => @week_day
        }
    }
}

Upvotes: 1

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