hash-notation

organization_obj = []

10.times.each do |_i|
  organization_obj <<
    { :name => 'names.sample',
      :title => 'title.sample',
      :salary => rand(50000..100000)
    }
end

organization_obj.map { |x| x[:salary] = '$ ' + x[:salary].to_s }

pp organization_obj

##############

organization_obj = []

10.times.each do |_i|
  organization_obj <<
    { name: 'names.sample',
      title: 'title.sample',
      salary: rand(50_000..100_000) }
end

organization_obj.map { |x| x[:salary] = '$ ' + x[:salary].to_s }

pp organization_obj

works without errors in ruby 2.5.5

#output
$ ruby hash-notation.rb
[{:name=>"names.sample", :title=>"title.sample", :salary=>"$ 57000"},
 {:name=>"names.sample", :title=>"title.sample", :salary=>"$ 87709"},
 {:name=>"names.sample", :title=>"title.sample", :salary=>"$ 96638"},
 {:name=>"names.sample", :title=>"title.sample", :salary=>"$ 85470"},
 {:name=>"names.sample", :title=>"title.sample", :salary=>"$ 68444"},
 {:name=>"names.sample", :title=>"title.sample", :salary=>"$ 84630"},
 {:name=>"names.sample", :title=>"title.sample", :salary=>"$ 57395"},
 {:name=>"names.sample", :title=>"title.sample", :salary=>"$ 89794"},
 {:name=>"names.sample", :title=>"title.sample", :salary=>"$ 70581"},
 {:name=>"names.sample", :title=>"title.sample", :salary=>"$ 64424"}]
[{:name=>"names.sample", :title=>"title.sample", :salary=>"$ 52071"},
 {:name=>"names.sample", :title=>"title.sample", :salary=>"$ 85587"},
 {:name=>"names.sample", :title=>"title.sample", :salary=>"$ 63277"},
 {:name=>"names.sample", :title=>"title.sample", :salary=>"$ 92296"},
 {:name=>"names.sample", :title=>"title.sample", :salary=>"$ 72847"},
 {:name=>"names.sample", :title=>"title.sample", :salary=>"$ 92991"},
 {:name=>"names.sample", :title=>"title.sample", :salary=>"$ 74350"},
 {:name=>"names.sample", :title=>"title.sample", :salary=>"$ 73889"},
 {:name=>"names.sample", :title=>"title.sample", :salary=>"$ 63671"},
 {:name=>"names.sample", :title=>"title.sample", :salary=>"$ 50324"}]