Rails 3.2 iterate through an array

Check following code.

   @shipment_products = [ {"old_qty_shipped"=>"324", "product_id"=>"1", "qty_shipped"=>"12443"}, {"old_qty_shipped"=>"4343423", "product_id"=>"3", "qty_shipped"=>"321344"} , {"old_qty_shipped"=>"23", "product_id"=>"4", "qty_shipped"=>"321"}]

    @shipment_products.each do |p|
      Product.adjust_qtys(p['old_qty_shipped'], p['qty_shipped'], p['product_id'])
    end

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the_count = [1, 2, 3, 4, 5]
fruits = ['apples', 'oranges', 'pears', 'apricots']
change = [1, 'pennies', 2, 'dimes', 3, 'quarters']

# this first kind of for-loop goes through a list
# in a more traditional style found in other languages
for number in the_count
  puts "This is count #{number}"
end

# same as above, but in a more Ruby style
# this and the next one are the preferred 
# way Ruby for-loops are written
fruits.each do |fruit|
  puts "A fruit of type: #{fruit}"
end

# also we can go through mixed lists too
# note this is yet another style, exactly like above
# but a different syntax (way to write it).
change.each {|i| puts "I got #{i}" }

# we can also build lists, first start with an empty one
elements = []

# then use the range operator to do 0 to 5 counts
(0..5).each do |i|
  puts "adding #{i} to the list."
  # pushes the i variable on the *end* of the list
  elements.push(i)
end

# now we can print them out too
elements.each {|i| puts "Element was: #{i}" } 

Convert JSON String to JSON Array in rails?

You can use the json library json You can then do: jsonArray = [{"content":"1D","createdTime":"09-06-2011 00:59"}, {"content":"2D","createdtime":"09-06-2011 08:00"}] objArray = JSON.parse(jsonArray) In response to your comment, you can do this, as long as your JSON fits your model objArray.each do |object| # This is a hash object so now create a new one. newMyObject = MyObject.new(object) newMyObject.save # You can do validation or any other processing around here. end

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ActiveSupport::JSON.decode(string) will decode that for you into a delicious consumable object on the server side.