copy

问题 So when I copy using the dirs %userprofile%\Desktop\Out and %userprofile%\Desktop\Out\test The .txt are copied over however I get the error The file cannot be copied onto itself. When I run the script with %userprofile%\Desktop\Out and %userprofile%\Desktop\New Folder It runs smoothly. So my question is why does the script get confused when you copy from a common root folder to a different sub folder? @ECHO ON FOR /r "%userprofile%\Desktop\Out" %%a IN (*.txt) DO copy "%%a" "%userprofile%

问题 Dear all. I was wondering if there are examples of situations where you would purposefully pass an argument by value in C. Let me rephrase. When do you purposefully use C's pass-by-value for large objects? Or, when do you care that the object argument is fully copied in a local variable? EDIT : Now that I think about it, if you can avoid pointers, then do. Nowadays, "deep" copying is possible for mostly everything in small apps, and shallow copying is more prone to pointer bugs. Maybe. 回答1:

问题 This question is related to another question I posted yesterday, although it is much more general in nature. Because of the thread I mentionned, I have been trying to determine what objects can be copied, pickled, marshaled and what objects cannot. While doing that, I stumbled on this puzzle: new_obj = copy.deepcopy(my_obj) function_that_uses_my_new_obj(new_obj) throws: function_that_uses_my_new_obj(new_obj) RuntimeError: Internal C++ object (Pyside.QtGui.QWidget) already deleted Now, since

问题 How do you copy specific file types from one folder into another folder while retaining the folder structure? The following batch command is capable of copying the specific file types to a folder, but lacks being able to retain the folder structure: for /R c:\source %%f in (*.cpp,*.h) do copy %%f x:\destination\ How could I modify this to keep the folder structure from the source? Thanks! 回答1: xcopy /e c:\source\*.xml x:\destination\ should do the job. See xcopy /? from the prompt for

问题 There doesn't seem to be a dictionary.AddRange() method. Does anyone know a better way to copy the items to another dictionary without using a foreach loop. I'm using the System.Collections.Generic.Dictionary. This is for .NET 2.0. 回答1: There's nothing wrong with a for/foreach loop. That's all a hypothetical AddRange method would do anyway. The only extra concern I'd have is with memory allocation behaviour, because adding a large number of entries could cause multiple reallocations and re

问题 I have to read a folder, count the number of files in the folder (can be of any type), display the number of files and then copy all the files to another folder (specified). How would I proceed? 回答1: i Have to read a folder, count the number of files in the folder (can be of any type) display the number of files You can find all of this functionality in the javadocs for java.io.File and then copy all the files to another folder (specified) This is a bit more tricky. Read: Java Tutorial >

问题 I want to create a batch file to copy a file from any Dir into root folder that the .bat file located on that like a USB flash drive . My incomplete command : xcopy /s "%userprofile%\Desktop\test.txt" "?" What can I replace with "?" ??? Thanks guys 回答1: This will do exactly as you want to any and all connected USB drives. @echo off for /F "usebackq tokens=1,2,3,4 " %%i in (`wmic logicaldisk get caption^,description^,drivetype 2^>NUL`) do ( if %%l equ 2 ( xcopy /s "%userprofile%\Desktop\test

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . How do I make a button that allows me to copy like the ctrl+c function. I want to select a part of a rich text box and when the button is clicked it copies the selected part. With formatting! 回答1: On button click event you should do something like: if (richTextBox1.SelectionLength > 0) // Copy the selected text

问题 I have following code: for (int c = 0; c < date_old.Length; c++) { for (int d = 0; d < date_new.Length; d++) { newList[c] = data_old[c]; if (date_old[c] == date_new[d]) { newList[c] = data_new[d]; } } } What I'm trying to do is the following: I have four arrays: date_new , date_old , data_new , data_old and a List called newList . date_old and data_old have the same length and date_new and data_new too. I want to loop through the date arrays check if there are equal date values. While I'm

问题 I have two excel sheets: "Sheet1" and "Sheet2". Sheet1 contains 3 columns with an N number of rows. Example: x y result A b B m L a A b B b Sheet2 contains 3 columns as well but with the result as an explanation for each x and y combination. Example: x y result A a 1 A b 2 A c 3 B a 4 Please note that A != a, and result is not always a numeric value. So basically I need to search Sheet2 for a given combination from values of Sheet1 and copy the result from Sheet2 to Sheet1. Can you give me