overwrite

问题 My program is currently using FileOutputStream output = new FileOutputStream("output", true); A while loop creates the output file if it is not yet created and appends some data to this file for every iteration of the while loop using output.write(data). This is fine and is what I want. If I run the program again the file just doubles in size as it appends the exact information to the end of the file. This is not what I want. I would like to overwrite the file if I run the program again. 回答1:

问题 I use maven-assembly-plugin with "jar-with-dependencies" to package jar. There are 2 dependencies artifact having log-back.xml. The second artifact is depend on the first one. I want to have log-back.xml of the second artifact in final jar, but it always contain log-back.xml of the first one. So how can I control this? Thanks 回答1: You can use the unpackOptions to achieve this. Try something like the following: <assembly> ... <dependencySets> <dependencySet> <outputDirectory>/</outputDirectory

问题 I have a text file text.txt that reads (for simplicity purposes) this is line one this is line two this is line three Again for simplicity's sake, I am just trying to set the first character in each line to 'x', so my desired result would be xhis is line one xhis is line two xhis is line three So I am opening the text.txt file and trying to overwrite each line with the desired output to the same text file. In the while loop, I set the first character in each line to 'x'. I also set the

问题 I'm trying to write a method that will, given a file containing values to update or append, will update a second binary file. Apparently, when I overwrite a struct in the binary file, the offsets somehow change and that corrupts everything after it. Am I doing something wrong, and is there a way to prevent this without truncating and appending to the file? Current code: typedef struct{ int number; double price; } stock; void update(char* updatefile, char* binfile){ FILE *fin, *fout; stock

问题 JavaScript makes it easy to overwrite properties and functions of the global object. I'd like to find a way to check if the original version of a global property has been replaced. Consider someone putting this in their HTML: <script type="text/javascript"> window.encodeURIComponent = eval; </script> <script type="text/javascript" src="myscript.js"></script> If myscript.js calls the encodeURIComponent function somewhere, it will now behave unpredictably. So is there a way I can check inside

问题 Given I have a Spring bean configured as @Service("myService") public class DefaultService extends MyService { } and a class using this bean public class Consumer { @Autowired @Qualifier("myService") private MyService service; ... } I now want my project, that includes the preceding classes, to have Consumer another implementation of MyService being injected. Therefore I would like to overwrite the bean myService @Service("myService") public class SpecializedService implements MyService { }

问题 I'm using CICS in Cobol program and I've noticed that sometimes data are written out of the CICS memory. It cause a data corruption and my application stop. I don't know where it append, so I'm creating a parser to analyse my Cobol code to look for possible corruption in COMMAREA used by CICS. Now I checked following statements : EXEC CICS XCTL EXEC CICS LINK EXEC CICS RETURN TRANSID For each, I check if sent length (declared in LENGTH parameter) is not greater than sent COMMAREA . Then I

问题 I have been following the lessons on HTML and CSS provided by Jeffery Way on Tuts+: http://learncss.tutsplus.com/ I got to the video on Zen Coding: http://learncss.tutsplus.com/lesson/zen-coding/ I tried installing Zen Code to Sublime Text 2 but couldn't get it to work. I looked around on the web and found Emmet, which seemed like the new best thing. So I installed through the Command Pallete>"Package Install">"Emmet". It works great, the only issue is a snippet I used before is overwritten

问题 I am trying to save in my iOS app some data. I use the following code : NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *path = [documentsDirectory stringByAppendingPathComponent:@"yourPlist.plist"]; //inserting data NSMutableDictionary *dict = [[NSMutableDictionary alloc] init]; [dict setValue:categoryField.text forKey:@"Category"]; [dict setValue:nameField.text forKey:@"Name"];

问题 Lets say I have 3 Classes: A , Data , and B I pass a variable from class A which sets that passed variable to a private variable in class Data . Then in class B , I want to call that specific variable which has been changed. So I do Data data = new Data(); data.getVariable(); It will then return null, since in class Data I initialize variables to nothing (ex: int v; ), and I think that class B is initializing a brand new class and resetting the values to default, but I don't know how to fix