Fairly straight forward question but Googling hasn't turned up anything as yet.
How do I copy/clone/duplicate an instance of an object in Coffeescript? I could always just create a clone() method which returns a new instance with copied values, but that seems like an error-prone way to go about it.
Does CoffeeScript offer a simpler solution?
Fairly straight forward question but Googling hasn't turned up anything as yet.
How do I copy/clone/duplicate an instance of an object in Coffeescript? I could always just create a clone() method which returns a new instance with copied values, but that seems like an error-prone way to go about it.
Does CoffeeScript offer a simpler solution?
Share Improve this question edited Jun 16, 2012 at 4:41 Larry Battle 9,1785 gold badges43 silver badges55 bronze badges asked Jun 16, 2012 at 3:48 Chris NoletChris Nolet 9,0738 gold badges69 silver badges95 bronze badges 03 Answers
Reset to default 8This might work.
clone = (obj) ->
return obj if obj is null or typeof (obj) isnt "object"
temp = new obj.constructor()
for key of obj
temp[key] = clone(obj[key])
temp
Adopted from : What is the most efficient way to deep clone an object in JavaScript?
Thanks to Larry Battle for the hint:
John Resig's solution of using jQuery.extend works brilliantly!
// Shallow copy
newObject = $.extend({}, oldObject);
// Deep copy
newObject = $.extend(true, {}, oldObject);
More information can be found in the jQuery documentation.
From The CoffeeScript Cookbook:
http://coffeescriptcookbook./chapters/classes_and_objects/cloning
Underscore.js also has a shallow clone function:
http://underscorejs/#clone