clone

I am new to java and I am trying to create an XML document and clone a specific node (minus the textnode) of this document over and over again. Someone answered me and said that I should subclass the node and override the cloning. So my question is what is sub-classing? @Charlie Martin has explained what subclassing means. However, it is not clear that you've been given good advice. If you are creating the XML document by assembling a DOM in memory, a better approach would be to create a helper class with static methods that perform the sequence of DOM node operations that you need to do.

I have a map on a page which displays several places with markers and infowindows. Now I'd like to put a fullscreen button and load the map into a jquery-ui dialog, but I've got some problems. Is there a way to copy the google map instance I've created in one div, into the other div? Or any other workaround, like changing the div associated with the map... science-fiction?? I don't think Google Maps themselves support such manipulation. Although it seems that moving the map is quite simple. The map has a method getDiv which returns Node containing the map. Using jQuery you can then manipulate

I have a jQuery-based form where you can add extra people to the application. I'm cloning the first fieldset and adding it onto the end up to a max of 3 additional people. When you've added 1 extra person then you have the option to remove that person. However, my remove button isn't working. It was, earlier, until I added the extra functions to the cloning to change the ids of other elements within the fieldset. I'm using: $(".remove").click(function() { $(this).parent().remove(); which was working originally but now it's not and I can't figure out why. I've taken out the lines that stop the

In a book on Core Java, I found this excerpt : Think about the way in which the Object class can implement clone. It knows nothing about the object at all, so it can make only a field-by-field copy. If all data fields in the object are numbers or other basic types, copying the fields is just fine. But if the object contains references to subobjects, then copying the field gives you another reference to the subobject, so the original and the cloned objects still share some information. After reading this I was wondering, that How is the clone method originally implemented in Object Class? What

Cloneable in Java is inherently broken. Specifically, my biggest problem with the interface is it expects a method behavior that doesn't define the method itself. So if traversing through a Cloneable list you must use reflection to access its defined behavior. However, in Java 8, we now have default methods and now I ask why there isn't a default clone() method in Cloneable . I understand why interfaces cannot default Object methods , however, this was an explicit design decision and so exceptions can be made. I sort of envision deprecating Object.clone() and changing its interior code to

I have copied the function below from an existing answer by Dmitriy Pichugin. This function can deep clone an object without any circular references- it works. function deepClone( obj ) { if( !obj || true == obj ) //this also handles boolean as true and false return obj; var objType = typeof( obj ); if( "number" == objType || "string" == objType ) // add your immutables here return obj; var result = Array.isArray( obj ) ? [] : !obj.constructor ? {} : new obj.constructor(); if( obj instanceof Map ) for( var key of obj.keys() ) result.set( key, deepClone( obj.get( key ) ) ); for( var key in obj

Properties of files received from an <input type="file"> are read-only. For example, the following attempt to re-write file.name would either fail silently or throw TypeError: Cannot assign to read only property 'name' of object '#<File>' . <input onchange="onchange" type="file"> onchange = (event) => { const file = event.target.files[0]; file.name = 'foo'; } Attempting to create a copy via Object.assign({}, file) fails (creates an empty object). So how does one clone a File object? My solution lay in the File constructor: https://developer.mozilla.org/en-US/docs/Web/API/File#Implementation

I've just finished cruising the Google search results that contain all the email rants about how stupid it is that git can't clone an empty repository. Some kind soul even submitted a patch. Until git is upgraded, what is the simplest, most straightforward method to clone an empty, bare git repository? The ideal solution will support the -o option to give the remote repo a name other than origin , and it will be implementable as a simple shell script, e.g., git-clone-empty-repo . (Why I want to do this: I've set up a bare, empty git repo on our NetApp filer where it will be backed up, but I