You cannot clone views, the way to do it is to inflate your View every time. Note that the XML is compiled into binary which can be parsed very efficiently.

I&#39;m trying to know if a class is an Enum, but I think I&#39;m missing something:

    if (test.MyEnum.class instanceof Enum&lt;?&gt;.class)
     obj = resultWrapper.getEnum(i, test.MyEnum.class);
    else 
     obj = resultWrapper.getObject(i);

It gives me an error saying that Enum&lt;?&gt;.class is not valid. So how I can check if a class is a Enum? I&#39;m pretty sure it is possible to determine that, I&#39;m just unable to get it.

Thanks


Checking if a class is java.lang.Enum

Can this Python code be shortened and still be readable using itertools and sets?

    result = {}
    for widget_type, app in widgets:
        if widget_type not in result:
            result[widget_type] = []
        result[widget_type].append(app)


I can think of this only:

    widget_types = zip(*widgets)[0]
    dict([k, [v for w, v in widgets if w == k]) for k in set(widget_types)])

Create or append to a list in a dictionary - can this be shortened?

My question is almost exactly this question:

[https://stackoverflow.com/questions/3900044/clone-textview-to-append-it-to-a-viewgroup][1]

However, I was inflating a view, and then attempting to clone it at the object level for performance reasons (I don&#39;t want to parse XML every single time), so that answer doesn&#39;t help me. View.clone() is protected and it apparently doesn&#39;t have a copy constructor. Is there any way to do this?


  [1]: https://stackoverflow.com/questions/3900044/clone-textview-to-append-it-to-a-viewgroup

How do I clone a View?

My question is almost exactly this question:
<a href="https://stackoverflow.com/questions/3900044/clone-textview-to-append-it-to-a-viewgroup" target="_blank" rel="noopener noreferrer">https://stackoverflow.com/questions/3900044/clone-textview-to-append-it-to-a-viewgroup</a>
However, I was inflating a view, and then attempting to clone it at the object level for performance reasons (I don't want to parse XML every single time), so that answer doesn't help me. View.clone() is protected and it apparently doesn't have a copy constructor. Is there any way to do this?

I have preferences where you can enable/disable what items will show up on the menu.  There are 17 items.  I made a string array in values/arrays.xml with titles for each of these 17 items.

I have preferences.xml which has the layout for my preferences file, and I would like to reference a single item from the string array to use as the title.

How can I do this?

In the Android developer reference, I see how I can reference a single string with XML, but not how I can reference a string from an array resource in XML.

Referencing a string in a string array resource with xml

I have created an application containing GWVectraNotifier activity which is called from other applications to display Notification.

In the Notification dialog, there will be &#39;show&#39; button and &#39;close&#39; button.

Onclick of &#39;show&#39; button, the corresponding activity will be started.

To check the functionality of the above application, 

I started the GWVectraNotifier activity from K9Mail application on checkmail event trigger.

I am able to start the GWVectraNotifier activity successfully, but onclick of &#39;show&#39; button i will have to start &#39;MessageList&#39; activity of K9mail.To do so, i wrote the below code:

    Intent i = new Intent();
    i.setComponent(new ComponentName(&quot;com.fsck.k9&quot;, &quot;com.fsck.k9.activity.MessageList&quot;));
    i.putExtra(&quot;account&quot;, accUuid);
    i.putExtra(&quot;folder&quot;, accFolder);
    startActivity(i); 

which throws :

    WARN/ActivityManager(59): Permission denied: checkComponentPermission() reqUid=10050
    WARN/ActivityManager(59): Permission Denial: starting Intent { cmp=com.fsck.k9/.activity.MessageList (has extras) } from ProcessRecord{43f6d7c8 675:com.i10n.notifier/10052} (pid=675, uid=10052) requires null
    WARN/System.err(675): java.lang.SecurityException: Permission Denial: starting Intent { cmp=com.fsck.k9/.activity.MessageList (has extras) } from ProcessRecord{43f6d7c8 675:com.i10n.notifier/10052} (pid=675, uid=10052) requires null
    WARN/System.err(675):     at android.os.Parcel.readException(Parcel.java:1247)
    WARN/System.err(675):     at android.os.Parcel.readException(Parcel.java:1235)
    WARN/System.err(675):     at android.app.ActivityManagerProxy.startActivity(ActivityManagerNative.java:1298)
    WARN/System.err(675):     at android.app.Instrumentation.execStartActivity(Instrumentation.java:1373)
    WARN/System.err(675):     at android.app.Activity.startActivityForResult(Activity.java:2817)
    WARN/System.err(675):     at android.app.Activity.startActivity(Activity.java:2923)
    WARN/System.err(675):     at com.i10n.notifier.GWVectraNotifier$2$1.run(GWVectraNotifier.java:63)
    WARN/System.err(675):     at android.app.Activity.runOnUiThread(Activity.java:3707)
    WARN/System.err(675):     at com.i10n.notifier.GWVectraNotifier$2.onClick(GWVectraNotifier.java:53)
    WARN/System.err(675):     at android.view.View.performClick(View.java:2408)
    WARN/System.err(675):     at android.view.View$PerformClick.run(View.java:8816)
    WARN/System.err(675):     at android.os.Handler.handleCallback(Handler.java:587)
    WARN/System.err(675):     at android.os.Handler.dispatchMessage(Handler.java:92)
    WARN/System.err(675):     at android.os.Looper.loop(Looper.java:123)
    WARN/System.err(675):     at android.app.ActivityThread.main(ActivityThread.java:4627)
    WARN/System.err(675):     at java.lang.reflect.Method.invokeNative(Native Method)
    WARN/System.err(675):     at java.lang.reflect.Method.invoke(Method.java:521)
    WARN/System.err(675):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
    WARN/System.err(675):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
    WARN/System.err(675):     at dalvik.system.NativeStart.main(Native Method)

Actually i am not able to understand what permissions to include in my Notifier application&#39;s manifest file to access MessageList of k9Mail. I am pasting below the permissions included in k9mail application&#39;s manifest file:    &lt;uses-permission android:name=&quot;android.permission.RECEIVE_BOOT_COMPLETED&quot;/&gt;
    
    &lt;uses-permission android:name=&quot;android.permission.READ_CONTACTS&quot;/&gt;
    &lt;uses-permission android:name=&quot;android.permission.READ_SYNC_SETTINGS&quot;/&gt;
    &lt;uses-permission android:name=&quot;android.permission.READ_OWNER_DATA&quot;/&gt;
    &lt;uses-permission android:name=&quot;android.permission.ACCESS_NETWORK_STATE&quot;/&gt;
    &lt;uses-permission android:name=&quot;android.permission.INTERNET&quot;/&gt;
    &lt;uses-permission android:name=&quot;android.permission.VIBRATE&quot;/&gt;
    &lt;uses-permission android:name=&quot;android.permission.WAKE_LOCK&quot;/&gt;
    &lt;uses-permission android:name=&quot;android.permission.WRITE_EXTERNAL_STORAGE&quot; /&gt;
    &lt;uses-permission android:name=&quot;org.thialfihar.android.apg.permission.READ_KEY_DETAILS&quot;/&gt;
    &lt;permission android:name=&quot;com.fsck.k9.permission.READ_ATTACHMENT&quot;
                android:permissionGroup=&quot;android.permission-group.MESSAGES&quot;
                android:protectionLevel=&quot;dangerous&quot;
                android:label=&quot;@string/read_attachment_label&quot;
                android:description=&quot;@string/read_attachment_desc&quot;/&gt;
    &lt;uses-permission android:name=&quot;com.fsck.k9.permission.READ_ATTACHMENT&quot;/&gt;
    &lt;permission android:name=&quot;com.fsck.k9.permission.REMOTE_CONTROL&quot;
                 android:permissionGroup=&quot;android.permission-group.MESSAGES&quot;
                 android:protectionLevel=&quot;dangerous&quot;
                 android:label=&quot;@string/remote_control_label&quot;
                 android:description=&quot;@string/remote_control_desc&quot;/&gt;
    &lt;uses-permission android:name=&quot;com.fsck.k9.permission.REMOTE_CONTROL&quot;/&gt;
    &lt;permission android:name=&quot;com.fsck.k9.permission.READ_MESSAGES&quot;
                android:permissionGroup=&quot;android.permission-group.MESSAGES&quot;
                android:protectionLevel=&quot;normal&quot;
                android:label=&quot;@string/read_messages_label&quot;
                android:description=&quot;@string/read_messages_desc&quot;/&gt;
    &lt;uses-permission android:name=&quot;com.fsck.k9.permission.READ_MESSAGES&quot;/&gt;
    &lt;permission android:name=&quot;com.fsck.k9.permission.DELETE_MESSAGES&quot;
                android:permissionGroup=&quot;android.permission-group.MESSAGES&quot;
                android:protectionLevel=&quot;normal&quot;
                android:label=&quot;@string/delete_messages_label&quot;
                android:description=&quot;@string/read_messages_desc&quot;/&gt;
    &lt;uses-permission android:name=&quot;com.fsck.k9.permission.DELETE_MESSAGES&quot;/&gt;           
Can some one tell me which permission to include in my app? In the above permissions some are only for k9mail , because those are the permission classes written for k9. So, i will only be able to include the built-in permissions of android in the above given permissions. I tried by doing so as well, but it didn&#39;t solve my issue :( 



Android: java.lang.SecurityException: Permission Denial: start Intent

Ok everyone knows that to hide a keyboard you need to implement:

    InputMethodManager imm = (InputMethodManager) getSystemService(INPUT_METHOD_SERVICE);
    imm.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(), 0);


But the big deal here is how to hide the keyboard when the user touches or selects any other place that is not an `EditText` or the softKeyboard?

I tried to use the `onTouchEvent()` on my parent `Activity` but that only works if user touches outside any other view and there is no scrollview.

I tried to implement a touch, click, focus listener without any success.

I even tried to implement my own scrollview to intercept touch events but I can only get the coordinates of the event and not the view clicked.

Is there a standard way to do this?? in iPhone it was really easy.




How to hide soft keyboard on android after clicking outside EditText?

I&#39;ve been looking for over a day for a solution to this problem but nothing helps, even the answers here. Documentation doesn&#39;t explain anything too.

I am simply trying to get a rotation in the direction of another object. The problem is that the bitmap is not rotated around a fixed point, but rather around the bitmaps (0,0).

Here is the code I am having troubles with:

      Matrix mtx = new Matrix();
      mtx.reset();
      mtx.preTranslate(-centerX, -centerY);
      mtx.setRotate((float)direction, -centerX, -centerY);
      mtx.postTranslate(pivotX, pivotY);
      Bitmap rotatedBMP = Bitmap.createBitmap(bitmap, 0, 0, spriteWidth, spriteHeight, mtx, true);
      this.bitmap = rotatedBMP;

The weird part is, it doesn&#39;t matter how I change the values within `pre`/`postTranslate()` and the float arguments in `setRotation()`. Can someone please help and push me in the right direction? :)



Android: How to rotate a bitmap on a center point

Dianne Hackborn mentioned in a couple threads that you can detect when a layout as been resized, for example, when the soft keyboard opens or closes. Such a thread is this one... http://groups.google.com/group/android-developers/browse_thread/thread/d318901586313204/2b2c2c7d4bb04e1b

However, I didn&#39;t understand her answer: &quot;By your view hierarchy being resized with all of the corresponding layout traversal and callbacks.&quot;

Does anyone have a further description or some examples of how to detect this?  Which callbacks can I link into in order to detect this?

Thanks

How to detect a layout resize?

I have a vertical sliding drawer at the bottom of my app. When the soft keyboard opens, it pushes the tab for the drawer up, so it sits atop the keyboard. I actually want it to remain at the bottom of the screen, becoming hidden when the keyboard is shown. 

Anyone else run into this issue? Know how to fix it?

Android: How do I prevent the soft keyboard from pushing my view up?

Whenever the software keyboard appears, it resizes the background image. Refer to the screenshot below:

![](http://i.stack.imgur.com/wXU2h.jpg)

As you can see, the background is sort of squeezed. Anyone can shed a light on why the background resizes?

My Layout is as follows:

    &lt;LinearLayout xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
        android:orientation=&quot;vertical&quot;
        android:layout_width=&quot;wrap_content&quot;
        android:layout_height=&quot;wrap_content&quot;
        android:background=&quot;@drawable/page_bg&quot;
        android:isScrollContainer=&quot;false&quot;
    &gt;
        &lt;LinearLayout android:layout_height=&quot;wrap_content&quot;
            android:orientation=&quot;horizontal&quot;
            android:layout_width=&quot;fill_parent&quot;
        &gt;
            &lt;EditText android:id=&quot;@+id/CatName&quot;
                android:layout_width=&quot;fill_parent&quot;
                android:layout_height=&quot;wrap_content&quot;
                android:layout_weight=&quot;1&quot;
                android:inputType=&quot;textCapSentences&quot;
                android:lines=&quot;1&quot;
            /&gt;
            &lt;Button android:layout_width=&quot;wrap_content&quot;
                android:layout_height=&quot;wrap_content&quot;
                android:text=&quot;@string/save&quot;
                android:onClick=&quot;saveCat&quot;
            /&gt;
        &lt;/LinearLayout&gt;
        &lt;ImageButton
            android:id=&quot;@+id/add_totalk&quot;
            android:layout_height=&quot;wrap_content&quot;
            android:layout_width=&quot;wrap_content&quot;
            android:background=&quot;@null&quot;
            android:src=&quot;@drawable/add_small&quot;
            android:scaleType=&quot;center&quot;
            android:onClick=&quot;createToTalk&quot;
            android:layout_marginTop=&quot;5dp&quot;
        /&gt;
    &lt;/LinearLayout&gt;

Software keyboard resizes background image on Android

I am trying to create a custom View that would replace a certain layout that I use at multiple places, but I am struggling to do so.

Basically, I want to replace this:

    &lt;RelativeLayout
     android:id=&quot;@+id/dolphinLine&quot;
     android:layout_width=&quot;fill_parent&quot;
     android:layout_height=&quot;wrap_content&quot;
        android:layout_centerInParent=&quot;true&quot;
     android:background=&quot;@drawable/background_box_light_blue&quot;
     android:padding=&quot;10dip&quot;
     android:layout_margin=&quot;10dip&quot;&gt;
      &lt;TextView
       android:id=&quot;@+id/dolphinTitle&quot;
       android:layout_width=&quot;200dip&quot;
       android:layout_height=&quot;100dip&quot;
       android:layout_alignParentLeft=&quot;true&quot;
       android:layout_marginLeft=&quot;10dip&quot;
       android:text=&quot;@string/my_title&quot;
       android:textSize=&quot;30dip&quot;
       android:textStyle=&quot;bold&quot;
       android:textColor=&quot;#2E4C71&quot;
       android:gravity=&quot;center&quot;/&gt;
      &lt;Button
       android:id=&quot;@+id/dolphinMinusButton&quot;
       android:layout_width=&quot;100dip&quot;
       android:layout_height=&quot;100dip&quot;
       android:layout_toRightOf=&quot;@+id/dolphinTitle&quot;
       android:layout_marginLeft=&quot;30dip&quot;
       android:text=&quot;@string/minus_button&quot;
       android:textSize=&quot;70dip&quot;
       android:textStyle=&quot;bold&quot;
       android:gravity=&quot;center&quot;
       android:layout_marginTop=&quot;1dip&quot;
       android:background=&quot;@drawable/button_blue_square_selector&quot;
       android:textColor=&quot;#FFFFFF&quot;
       android:onClick=&quot;onClick&quot;/&gt;
      &lt;TextView
       android:id=&quot;@+id/dolphinValue&quot;
       android:layout_width=&quot;100dip&quot;
       android:layout_height=&quot;100dip&quot;
       android:layout_marginLeft=&quot;15dip&quot;
       android:background=&quot;@android:drawable/editbox_background&quot;
       android:layout_toRightOf=&quot;@+id/dolphinMinusButton&quot;
       android:text=&quot;0&quot;
       android:textColor=&quot;#2E4C71&quot;
       android:textSize=&quot;50dip&quot;
       android:gravity=&quot;center&quot;
       android:textStyle=&quot;bold&quot;
       android:inputType=&quot;none&quot;/&gt;
      &lt;Button
       android:id=&quot;@+id/dolphinPlusButton&quot;
       android:layout_width=&quot;100dip&quot;
       android:layout_height=&quot;100dip&quot;
       android:layout_toRightOf=&quot;@+id/dolphinValue&quot;
       android:layout_marginLeft=&quot;15dip&quot;
       android:text=&quot;@string/plus_button&quot;
       android:textSize=&quot;70dip&quot;
       android:textStyle=&quot;bold&quot;
       android:gravity=&quot;center&quot;
       android:layout_marginTop=&quot;1dip&quot;
       android:background=&quot;@drawable/button_blue_square_selector&quot;
       android:textColor=&quot;#FFFFFF&quot;
       android:onClick=&quot;onClick&quot;/&gt;
    &lt;/RelativeLayout&gt;

By this:

    &lt;view class=&quot;com.example.MyQuantityBox&quot;
        android:id=&quot;@+id/dolphinBox&quot;
        android:layout_width=&quot;fill_parent&quot;
        android:layout_height=&quot;wrap_content&quot;
        android:myCustomAttribute=&quot;@string/my_title&quot;/&gt;

So, I do not want a custom layout, I want a custom View (it should not be possible for this view to have child).

The only thing that could change from one instance of a MyQuantityBox to another is the title. I would very much like to be able to specify this in the XML (as I do on the last XML line)

How can I do this? Should I put the RelativeLayout in a XML file in /res/layout and inflate it in my MyBoxQuantity class? If yes how do I do so?

Thanks!

Create a custom View by inflating a layout?

When should a View actually be used over an actual Table? What gains should I expect this to produce?

Overall, what are the advantages of using a view over a table? Shouldn&#39;t I design the table in the way the view should look like in the first place?

When to use a View instead of a Table?

I know how to get the root view with [View.getRootView()][1]. I am also able to get the view from a button&#39;s `onClick` event where the argument is a [View][2]. But how can I get the **view** in an [activity][3]?


  [1]: http://developer.android.com/reference/android/view/View.html#getRootView%28%29
  [2]: http://developer.android.com/reference/android/view/View.html
  [3]: http://developer.android.com/reference/android/app/Activity.html

Get root view from current activity

I want to programmatically move, copy and delete files and directories on SD card. I&#39;ve done a Google search but couldn&#39;t find anything useful.


How to programmatically move, copy and delete files and directories on SD?

I keep getting the same issue over and over again where an object I want to reference is copied or where an object I want to copy is referenced. This happens when I use the = operator.

For example, if I am sending the object to another form, ie: 

    SomeForm myForm = new SomeForm();
    SomeObject myObject = new SomeObject();
    myForm.formObject = myObject;

...and then modify the object in the form, the original object does not get modified. It is as if the object was copied and not referenced. Yet, when I do this:

    SomeObject myObject = new SomeObject();
    SomeObject anotherObject = new SomeObject();
    anotherObject = myObject;

...and then modify `anotherObject`, `myObject` gets modified as well.

The most aggravating case is when I try to Clone one of my defined objects:

    public class SomeObject
    {
        double value1, value2;
    
        //default constructor here
    
        public SomeObject(val1, val2)
        {
            value1 = val1;
            value2 = val2;
        }
    
        public void Clone(SomeObject thingToCopy)
        {
            this.value1 = thingToCopy.value1;
            this.value2 = thingToCopy.value2;
        }
    }

when I do this...

    SomeObject obj1 = new SomeObject(1, 2);
    SomeObject obj2 = new SomeObject();
    obj2.Clone(obj1);

...`obj1` is referenced and any modifications to `obj2` changes `obj1`.

System objects such as &lt;code&gt;int, double, string&lt;/code&gt;, etc seem to always be copied, except for in the case of the clone method above.

My question is, not taking into account the use of the &lt;code&gt;ref&lt;/code&gt; keyword in functions, when does an object get copied and when does an object get referenced in every case of the matter (i.e. when passing to functions, when setting as other objects (like the first two above examples), when copying member variables like the third example, etc.)?

When is a C# value/object copied and when is its reference copied?

Simply using this way:

    UIView* view2 = [view1 copy]; // view1 existed

This will cause simulator can not launch this app. 

Try retain, 

    UIView* view2 = [view1 retain]; // view1 existed
    // modify view2 frame etc

Any modifications to `view2` will apply to `view1`, I understand that `view2` share same memory with `view1`. 

Why can&#39;t `UIView` be copied? What is the reason?

Can UIView be copied?

I have a few files in the `assets` folder. I need to copy all of them to a folder say /sdcard/folder. I want to do this from within a thread. How do I do it? 

How to copy files from &#39;assets&#39; folder to sdcard?

**Update**

Looks like [browsers are starting to support copy natively in JS][1]


----------

In the console windows of both Chrome and Firefox on Mac I can execute

    copy(&quot;party in your clipboard!&quot;);

and the text gets copied to my clipboard. I have searched SO and Google and can&#39;t seem to find anything on this. 

 - Are these specific to each browser?
 - Where can I find more information on
   these JavaScript functions?

Browser versions:

![alt text][2]
![alt text][3]

JavaScript returned from Chrome console when executing &#39;copy&#39;


    function (object)
        {
            if (injectedScript._type(object) === &quot;node&quot;) {
                var nodeId = InjectedScriptHost.pushNodePathToFrontend(object, false, false);
                InjectedScriptHost.copyNode(nodeId);
            } else
                InjectedScriptHost.copyText(object);
        }

 - What does this code mean?

Here are 2 screenshots of executing copy function in Chrome console with all chrome extensions disabled

![alt text][4]

![alt text][5]


  [1]: https://developers.google.com/web/updates/2015/04/cut-and-copy-commands?hl=en
  [2]: http://i.stack.imgur.com/KIiX5.png
  [3]: http://i.stack.imgur.com/dAsN7.png
  [4]: http://i.stack.imgur.com/U3TBe.png
  [5]: http://i.stack.imgur.com/7ccYY.png

Secret copy to clipboard JavaScript function in Chrome and Firefox?

How can I clone a DateTime object in C#?

We have a repository with three named branches, I wanted to clone one of the branches. Is there a mercurial command to do that? If I provide the path (of branch) with hg clone I get 404 error.

Mercurial clone from a branch

I was looking to find the difference between these four on Google and I expected there to be a huge amount of information on this, but there really wasn&#39;t any solid comparison between the four calls. 

I set about trying to compile a kind of basic at-a-glance look at the differences between these system calls and here&#39;s what I got. Is all this information correct/am I missing anything important ?

`Fork` : The fork call basically makes a duplicate of the current process, identical in almost every way (not everything is copied over, for example, resource limits in some implementations but the idea is to create as close a copy as possible).

The new process (child) gets a different process ID (PID) and has the PID of the old process (parent) as its parent PID (PPID). Because the two processes are now running exactly the same code, they can tell which is which by the return code of fork - the child gets 0, the parent gets the PID of the child. This is all, of course, assuming the fork call works - if not, no child is created and the parent gets an error code.

`Vfork` : The basic difference between vfork and fork is that when a new process is created with vfork(), the parent process is temporarily suspended, and the child process might borrow the parent&#39;s address space. This strange state of affairs continues until the child process either exits, or calls execve(), at which point the parent 
process continues. 

This means that the child process of a vfork() must be careful to avoid unexpectedly modifying variables of the parent process. In particular, the child process must not return from the function containing the vfork() call, and it must not call exit() (if it needs to exit, it should use _exit(); actually, this is also true for the child of a normal fork()). 

`Exec :` The exec call is a way to basically replace the entire current process with a new program. It loads the program into the current process space and runs it from the entry point. exec() replaces the current process with a the executable pointed by the function. Control never returns to the original program unless there is an exec() error.

`Clone :` Clone, as fork, creates a new process. Unlike fork, these calls allow the child process to share parts of its execution context with the calling process, such as the memory space, the table of file descriptors, and the table of signal handlers.

When the child process is created with clone, it executes the function application fn(arg). (This differs from fork, where execution continues in the child from the point of the original fork call.) The fn argument is a pointer to a function that is called by the child process at the beginning of its execution. The arg argument is passed to the fn function. 

When the fn(arg) function application returns, the child process terminates. The integer returned by fn is the exit code for the child process. The child process may also terminate explicitly by calling exit(2) or after receiving a fatal signal. 



Information gotten form : 

 - [https://stackoverflow.com/questions/1653340/exec-and-fork][1]
 - [http://www.allinterview.com/showanswers/59616.html][2]
 - [http://www.unixguide.net/unix/programming/1.1.2.shtml][3]
 - [http://linux.about.com/library/cmd/blcmdl2_clone.htm][4]


Thanks for taking the time to read this ! :)


  [1]: https://stackoverflow.com/questions/1653340/exec-and-fork
  [2]: http://www.allinterview.com/showanswers/59616.html
  [3]: http://www.unixguide.net/unix/programming/1.1.2.shtml
  [4]: http://linux.about.com/library/cmd/blcmdl2_clone.htm

The difference between fork(), vfork(), exec() and clone()

Consider this scenario:

```python
#!/usr/bin/env python
# -*- coding: utf-8 -*-
import os

walk = os.walk(&#39;/home&#39;)

for root, dirs, files in walk:
    for pathname in dirs+files:
        print os.path.join(root, pathname)

for root, dirs, files in walk:
    for pathname in dirs+files:
        print os.path.join(root, pathname)
```

I know that this example is kinda redundant, but you should consider that we need to use the same `walk` data more than once. I&#39;ve a benchmark scenario and the use of same `walk` data is mandatory to get helpful results.

I&#39;ve tried `walk2 = walk` to clone and use in the second iteration, but it didn&#39;t work. The question is... How can I copy it? Is it ever possible?

Thank you in advance.

How to clone a Python generator object?

Question:

    package GoodQuestions;
    public class MyClass {	
    	MyClass() throws CloneNotSupportedException {
    		try {
    			throw new CloneNotSupportedException();
    		} catch(Exception e) {
    			e.printStackTrace();
    		}
    	}	
    
    	public static void main(String[] args) {	
    		try {
    			MyClass  obj = new MyClass();
    			MyClass obj3 = (MyClass)obj.clone();			
    		} catch (CloneNotSupportedException e) {
    			e.printStackTrace();
    		}
    	}
    }

Here class &#39;MyClass&#39; can able to clone its own object by calling the clone method in &#39;Object&#39; class.
When I try to clone the of this class(&#39;MyClass&#39;) in another class(&#39;TestSingleTon&#39;) in the same package &#39;GoodQuestions&#39; it is throwing the following compile time error.

***&#39;The method clone() from the type Object is not visible***&#39;

So here is the code it throwing the above error?

    package GoodQuestions;
    public class TestSingleTon {
    	public static void main(String[] args) {
    		MyClass  obj = new MyClass();
    		MyClass obj3 = obj.clone(); ---&gt; here is the compile error.
    	}
    }

Content Type	Original Author	Original Content on Stackoverflow
Question	SapphireSun	View Question on Stackoverflow
Solution 1 - Android	Romain Guy	View Answer on Stackoverflow

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