Deep copy vs Shallow Copy
Possible Duplicate: What is the difference between a deep copy and a shallow copy? What is the difference between deep and shallow copy. What type of a copy does a copy constructor do? ...
clone
How do you do A/B switching in a web app? (for deploying updates)
I currently have a mysite.com (A) which points to /public_html/ and a dev.mysite.com (B) which I created a /dev_html/ for that. I cloned the site but now I need a way of switching between them without having to copy all the files from one dir to another and without bringing the site down. I just want to switch the live site to B and then...
Javascript clone form?
I need to copy a form information with all types of elements and send it with AJAX. Tried these: 1. cloneNode on the form. - Doesn't work with IE, only copies text stuff properly. cloneNode on each element. Doesn't work with IE, only copies text stuff properly. Making new textareas for each element, and copying the value in. Does...
Datamapper Clone Record w/ New ID
class Item include DataMapper::Resource property :id, Serial property :title, String end item = Item.new(:title => 'Title 1') # :id => 1 item.save item_clone = Item.first(:id => 1).clone item_clone.save This does "clone" the object as described but how can this be done so it applies a different ID once the record is saved, e.g...
How do I find a node in a range, and then remove it?
I'm copying a range from the page and pasting it back elsewhere, but this becomes problematic when it includes a piece of the page that I don't want to copy. Is there a good way to remove nodes from a range by id? Or if not, in the event that there are two nodes on the page with the same id, is there any way to identify one over the othe...
jquery clone only once
I have a series of divs like this: <div id="available-posts"> <div class="post" id="unique_id"> <a href="#" class="addme">Add</a> Some text </div> <div class="post" id="unique_id"> <a href="#" class="addme">Add</a> Some text </div> </div> The unique_id is a different number for each of the divs. Now i hav...
Clone List Elements in Java
Hi all, I have a variable of type List<RelationHeader>. Now I want to copy all the elements in this list to a new list, but I want to actually copy all the members by value (clone them). Is there a quick command to do this, or do I need to iterate over the list and copy them one at a time? ...
Implementing Clonable in Java
In which cases should I use this way: public A clone() throws CloneNotSupportedException { A clone = (A)super.clone(); clone.x= this.x; return clone; } And in which cases should I use that way: public ShiftedStack clone() throws CloneNotSupportedException { return new A(this.x); } What should I do if x is final and ...
Remove a dom element from the document, but save it as a variable?
Is there a way to remove a dom element from the document, but save it as a variable? I'm guessing I have to save the clone as a var, and then remove the original? Also, would such a technique store styles etc? ...
jquery - clone nth row of a table?
I'm trying to use jquery to clone a table row everytime someone presses the add-row button. Can anyone tell me what's wrong with my code? I'm using HTML + smarty templating language in my view. Here's what my template file looks like: <table> <tr> <td>Description</td> <td>Unit</...
C++ Virtual Constructor, without clone()
I want to perform "deep copies" of an STL container of pointers to polymorphic classes. I know about the Prototype design pattern, implemented by means of the Virtual Ctor Idiom, as explained in the C++ FAQ Lite, Item 20.8. It is simple and straightforward: struct ABC // Abstract Base Class { virtual ~ABC() {} virtual ABC * clo...
php: two objects from the same class work independent of each other
Good morning, I would like the code in my controller to look something like this: <?php $class = new sanitizeInput() $string1 = $class -> input($_POST[name]) -> mysql_escape(); $string2 = $class -> input($_POST[age]) -> mysql_escape(); print " String1: $string1 <br /> String2: $string2" ?> It seems with my sanitizeInput c...
jQuery clone problem
Hi all, I am trying to clone a div and change the names of the input fields in this div. It works great for most of the browsers but IE 7 does not change the name attribute of the input fields. Demo: http://jsbin.com/iduro/7 HTML <body> <pre></pre> <div><input value="Hello World" name="test"></div> </body> JS var lastRow = $("...
Design Pattern for JQuery clone()
Hi All, I have a select box that gets generated dynamically. I want to allow users to create more copies of this select box if they need to but I want to avoid extra database calls so I want to use clone() instead of an AJAX load(). The problem is that I need an input field after each select box, so the user can enter a value. The clone...
how to clone forms in javascript preserving event bindings
I am about to clone a part of form which has some actions bound to click events. I want to change all occurences of word TEMPLATE in attributes to 'n_'+ID. I want to abstract from structure of cloned part - It would be one TEMPLATE or 10. I tried to something like this but the bindings are lost: insert = function(){ var old = $('#T...
Prototype Element.remove() not working in IE
Hi there. I have a javascript function that gets a DIV by an ID and makes a clone. Then, removes the original DIV from DOM and inserts the cloned object..Everything works fine, except in IE, because the original DIV is never removed... var loadingDiv = $(Sybil.conf.loadingDivId), loadingClone = loadingDiv.clone(true); console.l...
jQuery.clone() IE problem
I'm have some that uses jQuery.clone() to get the html of a page and then add it to a pre tag. It works correctly in Firefox and Chrome, but nothing happens in IE: <!DOCTYPE html> <html> <head> <script class="jsbin" src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script> <meta charset=utf-8 /> <title>JS Bin<...
How to remove the selected element during a clone() operation
Hi All, I have a select box that gets cloned. I want to remove the user's previous selection from each cloned select box. Here is the method that does the clone() : function addselect(s){ $('#product_categories > .category_block:last').after( $('#product_categories > .category_block:last').clone() ); set_add_delete_links(); retu...
Question about the Cloneable interface and the exception that should be thrown
Hi, The Java documentation says: A class implements the Cloneable interface to indicate to the Object.clone() method that it is legal for that method to make a field-for-field copy of instances of that class. Invoking Object's clone method on an instance that does not implement the Cloneable interface results in ...
Question about cloning in Java
In Effective Java, the author states that: If a class implements Cloneable, Object's clone method returns a field-by-field copy of the object; otherwise it throws CloneNotSupportedException. What I'd like to know is what he means with field-by-field copy. Does it mean that if the class has X bytes in memory, it will just co...