clone

问题 If I have a type defined as: type T struct { S string is []int } then how can I go about cloning an object of this type? If I do a simple assignment: p := T{"some string", []int{10, 20}} q := p Then any changes made to the []int affect both objects. Since T.is is not exported, it cannot be copied over explicitly, even if extracted using reflect. I'm currently supplying a Clone method in the package of the type itself. But that doesn't help with similar types in other packages. Is there

问题 I need to perform deep cloning on my complex object model. What do you think is the best way to do that in .Net? I thought about serializing / Deserializing no need to mention that MemberwiseClone is not good enough. 回答1: If you control the object model, then you can write code to do it, but it is a lot of maintenance. There are lots of problems, though, which mean that unless you need absolutely the fastest performance, then serialization is often the most manageable answer. This is one of

问题 Is there any way to easily clone an Eloquent object, including all of its relationships? For example, if I had these tables: users ( id, name, email ) roles ( id, name ) user_roles ( user_id, role_id ) In addition to creating a new row in the users table, with all columns being the same except id , it should also create a new row in the user_roles table, assigning the same role to the new user. Something like this: $user = User::find(1); $new_user = $user->clone(); Where the User model has

问题 What exactly does the clone() method in Java return when used on an array? Does it return a new array with data copied from the original? Ex: int[] a = {1,2,3}; int[] b = a.clone(); 回答1: When the clone method is invoked upon an array, it returns a reference to a new array which contains (or references) the same elements as the source array. So in your example, int[] a is a separate object instance created on the heap and int[] b is a separate object instance created on the heap. (Remember all

问题 I am trying to clone a Git repo using a custom SSH command. I set the SSH command in the GIT_SSH environmental variably be running export GIT_SSH="/usr/bin/ssh -o StrictHostKeyChecking=no -i /home/me/my_private_key" . But when, after the previous command I run git clone git@bitbucket.org:uname/test-git-repo.git , I get the following weird error error: cannot run /usr/bin/ssh -o StrictHostKeyChecking=no -i /home/me/my_private_key fatal: unable to fork Can you please help me out solve this

问题 I'm working on this website where users can create their own bundles. Basically they have a list of courses and they can pick 5 and create a bundle. The approach I'm taking is a dropdown list of all courses that then gets cloned on click. What I'd like to do is disable any previously selected items on the next cloned list. Is this possible? Here's my code: http://jsfiddle.net/Y4fLM/ Thanks a lot! 回答1: You can try this one as well http://jsfiddle.net/Y4fLM/3/ As with your question it seems may

问题 I am trying to clone a form and change the form name from (for example) #form and when cloned to #form1 and do the same on the inputs and I am really stuck on how to do this! Any help would be GREATLY appreciated as I have spent ALL DAY trying to figure it out. Here is my code: HTML: <div class="avail"> <form action="submit.php" id="form1" method="post"> <input type="text" name="input1" /> <input type="text" name="anotherinput1" /> <input type="text" name="onemoreinput1" /> <input type=

问题 I figured out how to clone my form rows and append an incriminting number to the end of the ID's for each form field. So I thought with that appended incriminenting number at the end of the ID it would then be easy to use on change event to copy the value of one id to another, but this is not working for the cloned rows! I am using this to create new form rows: $('#btnRemove').attr('disabled','disabled'); $('#btnAdd').click(function() { var num = $('.clonedInput').length; var newNum = new

问题 For the past few hours I have been trying to clone an image in Flex (using the Spark Components, but also trying to convert between Bitmap and BitmapImage). What I am trying exactly is to create a simple painting application which keeps track of each Brush-Stroke. As soon as the Image on the Canvas has changed, it is to be cloned and then the clone is to be put into the History-Panel on the bottom of the application. Things I have tried include: Using ObjectUtils.clone(Object) Creating

问题 Suppose there is a static object with type A . class A { public string b; public int c; public bool d; public A e; . . . } A a = new A(){ b = "string", c = 12, d = true e = new A(){ b = "another string", c = 23 } }; I want to deep clone this object into a dynamic object with all of its properties. 回答1: I would enumerate the properties of the object (a.GetType().GetProperties()), destinguish between built-in types, structs and classes and use ExpandoObject to build the dynamic object. 回答2: The