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First question: Write the results of the final printA = [1, 2, 3, 4]for x in a: a.remove (x) print (a) print ("=" *) b = [1, 2, 3, 4]for i in B: B.pop () print (b) print ("=" *) c = [1, 2, 3, 4]for I in range (Len (c)): del c[0]print (c) At first, it should all be []??Ran a bit on the machine:[2, 4]====================[1, 2]====================[ ]Get the results as above, is not very surprised!!The first thing to understand is the difference between the three
Take a=[1,2,3] For example, it seems to use Del, remove, pop an element 2 after a is all for [1,3], as follows:
>>> a=[1,2,3]
>>> A.remove (2)
>>> A
[1, 3]
>>> a=[1,2,3]
>>> del a[1]
>>> A
[1, 3]
>>> a= [1,2,3]
>>> A.pop (1)
2
>>> A
[1, 3]
>>>
So what's the difference between Python and the list del, remove, and
/********************************************************************** Author : Samson* Date : 10/21/2014* Test platform:* Mint 16* GNU bash, version 4.2.45* *******************************************************************/
Unmount (umount)
Only unmount, you can directly re-mount,
Simply put, the link to the storage medium on the access device is removed from the software,
In general, unplugging the device is safe for the data in it,
Because the data read/write has been terminated at the ti
Securely remove the drive, pop-up, detach, and view the differences before and after the device is executed
/********************************************************************* * Author : Samson * Date : 10/21/2014 * Test platform: * Mint 16 * GNU bash, version 4.2.45 * *******************************************************************/
Unmount (umount)
Only unmount, you c
Disclaimer: Reprint Please specify the source!!!Python generally has two methods for deleting an element in the list, pop () and remove ().If you delete a single element, use basically no problem, as follows.1.pop () method, which passes the index of the element to be deleted:x = [' A ', ' B ', ' C ', ' d ']x.pop (2) Print x------------------result:[' A ', ' B ',
JavaScript uses the pop method to remove the last element usage instance of the array. javascriptpop
This example describes how to remove the last element of an array using the pop method in JavaScript. Share it with you for your reference. The details are as follows:
The following code demonstrates the
How to remove a pop-up window when iphone5 connect to a computerSome users ' iphone5 will automatically appear when they connect to a computer, prompting some quick action for the iphone. This function for some just contact iphone5 friend is a very convenient operation, but after a period of time will find that iphone5 connect the computer is more to the mobile phone charge, not every time to upload, downlo
VC, edit control the default point of the right button will pop up the shortcut menu, such as copy, paste and so on, but sometimes we want to remove, the data collected from the Internet is mainly sub-class edit control, and then handle wm_contextmenu rest, in fact, nothing in this message can be done.
In general, editing controls that can be sub-typed can be used to mask the right-click menu in this way,
, but in some cases, such as the interface has a video playback function, click Full-screen playback, exit full screen, the title bar may not be hidden. However, in general, the hidden function is not a problem)Getsupportactionbar (). Hide (); // Hide title bar GetWindow (). SetFlags (WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_ fullscreen); // realize full screen, hide the phone on the top of the time-related information display Reference :Android Development
This article describes how to remove the last element of an array using the pop method in JavaScript. The example shows how to use the pop method in javascript, for more information about how to remove the last element of an array using the pop method in JavaScript, see the
1>>> x = [1,2,3,4,5,6,7]2>>> X.pop ()#Eject and return the trailing element374>>> X.pop (0)#pops up and returns the element at the specified position516>>> X.clear ()#Delete all elements7>>>x8 []9>>> x = [1,2,2,2,3,4]Ten>>> X.remove (2)#Delete the first element with a value of 2 One>>>x A[1, 2, 2, 3, 4] ->>>delX[3]#Delete an element at a specified location ->>>x the[1, 2Python Basic Course: List Method pop (), rem
First, of course we can use umount to uninstall it.You can use the mount command again to reload;
However, if "pop-up"/"eject" is selected, it cannot be reloaded. This is generally applicable to optical drives;
"Safely remove the driver"/"safely remove device", stop rotating the USB flash drive/mobile hard drive and uninstall it automatically;
Differen
JavaScript uses the pop method to remove the last element of an array. Usage example:
The following code demonstrates the pop method of the js array, which can be used to remove the last element of the array. In fact, the array is used as a stack.
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