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  • Which is more effective in coding? Reducing line of code and execution of code?

    - by Ayyappan.Anbalagan
    I have this doubt many years. I am wring some code to achieve some functionality. For example I am writing 20 lines of code to achieve the functionality and my co worker writing the code for the same functionality with just 5 lines. Since he used some looping statement to achieve that, but that code will execute around 30 to 50 times. So which is best way of coding? As per my knowledge I always try to reduce coding length as much I can.

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  • Cloud Sample Code on OTN

    - by Oliver Steinmeier
    In recent months our blog has covered many aspects of the overall Oracle Cloud platform, whether it's PaaS (Java Cloud Service, Database Cloud Service) or SaaS (Sales Cloud Application Composer). Teams within Oracle have been busy building demos and proof-of-concept applications using the same technologies, and we have now started posting some of these as code samples on the Oracle Technology Network (OTN).  The zip files include both the source code and helpful information to get you started using the code.  Everything is covered under a BSD license.  In future blog posts we will dive deeper into some of these applications. Do you have any ideas or requests for sample code you would like us to create to help you with your work?  Hit the comments and let us know! 

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  • JEditorPane Code Completion (Part 3)

    - by Geertjan
    The final step is to put an object into the Lookup on key listening in each of the JEditorPanes, e.g., a "City" object for the CityEditorPane and a "Country" object for the CountryEditorPane. Then, within the CompletionProviders, only add items to the CompletionResultSet if the object of interest is in the Lookup. The result is that you can then have different code completions in different JEditorPanes, as shown below: I've also included the Tools | Options | Editor | Code Completion tab, so that the code completion can be customized. The full source code for the example is here: java.net/projects/nb-api-samples/sources/api-samples/show/versions/7.2/misc/CustomerApp

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  • What are the design principles that promote testable code? (designing testable code vs driving design through tests)

    - by bot
    Most of the projects that I work on consider development and unit testing in isolation which makes writing unit tests at a later instance a nightmare. My objective is to keep testing in mind during the high level and low level design phases itself. I want to know if there are any well defined design principles that promote testable code. One such principle that I have come to understand recently is Dependency Inversion through Dependency injection and Inversion of Control. I have read that there is something known as SOLID. I want to understand if following the SOLID principles indirectly results in code that is easily testable? If not, are there any well-defined design principles that promote testable code? I am aware that there is something known as Test Driven Development. Although, I am more interested in designing code with testing in mind during the design phase itself rather than driving design through tests. I hope this makes sense. One more question related to this topic is whether it's alright to re-factor an existing product/project and make changes to code and design for the purpose of being able to write a unit test case for each module?

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  • How to separate and maintain customer specific code

    - by WYSIWYG
    I am implementing customer specific code and currently following simple approach like if (cusomterId == 23) do it. I want to separate out all the customer related code in separate place. But I have following problems. In code is in 1. Stored procs 2. Plain old classes. 3. Controllers 4. Views I came up with two solutions. First is to create table CustomerFunctionlity with columns CustomerId, FunctionalityName, method/Proc, inputs/outputs With this table I can simply check if exists, execute given function. Another way is creating a factory which returns customer related object for an interface. I am writting small end to end customer specific functionalities. How can I write maintenable code. Thanks

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  • Copy data from Access to the next row in Excel

    - by edmon
    I have a MS Access database for a small Hotel. On the main form I have Guest Information fields...(Name, Address, Phone#, etc). I also have an Excel file that keeps track of bookings for the Hotel. The following code takes the Guest information from my form in Access and populates the labeled cells in my Excel file. Dim objXLApp As Object Dim objXLBook As Object Set objXLApp = CreateObject("Excel.Application") Set objXLBook = objXLApp.Workbooks.Open("Y:\123files\E\Hotel Reservation.xls") objXLApp.Application.Visible = True objXLBook.ActiveSheet.Range("B2") = Me.GuestFirstName & " " & GuestLastName objXLBook.ActiveSheet.Range("C2") = Me.PhoneNumber objXLBook.ActiveSheet.Range("D2") = Me.cboCheckInDate objXLBook.ActiveSheet.Range("E2") = Me.cboCheckOutDate objXLBook.ActiveSheet.Range("G2") = Me.RoomType objXLBook.ActiveSheet.Range("H2") = Me.RoomNumber End Sub Is there a way to, move to the next row in my Excel file, for a new guests info? EX. I take my first guests info and it populates row 2 of my Excel file. For my next guest it will populate row 3 of my Excel file and so on....

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  • Is testable code actually more stable? [closed]

    - by Xodarap
    A google scholar search turns up numerous papers on testability, including models for computing testability, recommendations for how ones code can be more testable, etc. They all come with the assertion that more testable code is more stable, however I can't find any studies which actually demonstrate this. I tried looking for studies evaluating the effect of testable code vs. quality, however the closest I can find is Improving the Testability of Object Oriented Systems, which discusses the relationship between design flaws and testability. Is testable code is actually more stable? And why, or why not? Please back up your answers with references or evidence to back up your claim.

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  • Using macro to check null values [migrated]

    - by poliron
    My C code contains many functions with pointers to different structs as parameteres which shouldn't be NULL pointers. To make my code more readable, I decided to replace this code: if(arg1==NULL || arg2==NULL || arg3==NULL...) { return SOME_ERROR; } With that macro: NULL_CHECK(arg1,arg2,...) How should I write it, if the number of args is unknown and they can point to different structs?(I work in C99)

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  • STL vector reserve() and copy()

    - by natersoz
    Greetings, I am trying to perform a copy from one vector (vec1) to another vector (vec2) using the following 2 abbreviated lines of code (full test app follows): vec2.reserve( vec1.size() ); copy(vec1.begin(), vec1.end(), vec2.begin()); While the call to vec2 sets the capacity of vector vec2, the copying of data to vec2 seems to not fill in the values from vec1 to vec2. Replacing the copy() function with calls to push_back() works as expected. What am I missing here? Thanks for your help. vectest.cpp test program followed by resulting output follows. Compiler: gcc 3.4.4 on cygwin. Nat /** * vectest.cpp */ #include <iostream> #include <vector> using namespace std; int main() { vector<int> vec1; vector<int> vec2; vec1.push_back(1); vec1.push_back(2); vec1.push_back(3); vec1.push_back(4); vec1.push_back(5); vec1.push_back(6); vec1.push_back(7); vec2.reserve( vec1.size() ); copy(vec1.begin(), vec1.end(), vec2.begin()); cout << "vec1.size() = " << vec1.size() << endl; cout << "vec1.capacity() = " << vec1.capacity() << endl; cout << "vec1: "; for( vector<int>::const_iterator iter = vec1.begin(); iter < vec1.end(); ++iter ) { cout << *iter << " "; } cout << endl; cout << "vec2.size() = " << vec2.size() << endl; cout << "vec2.capacity() = " << vec2.capacity() << endl; cout << "vec2: "; for( vector<int>::const_iterator iter = vec2.begin(); iter < vec2.end(); ++iter ) { cout << *iter << endl; } cout << endl; } output: vec1.size() = 7 vec1.capacity() = 8 vec1: 1 2 3 4 5 6 7 vec2.size() = 0 vec2.capacity() = 7 vec2:

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  • Invert linear linked list

    - by ArtWorkAD
    Hi, a linear linked list is a set of nodes. This is how a node is defined (to keep it easy we do not distinguish between node an list): class Node{ Object data; Node link; public Node(Object pData, Node pLink){ this.data = pData; this.link = pLink; } public String toString(){ if(this.link != null){ return this.data.toString() + this.link.toString(); }else{ return this.data.toString() ; } } public void inc(){ this.data = new Integer((Integer)this.data + 1); } public void lappend(Node list){ Node child = this.link; while(child != null){ child = child.link; } child.link = list; } public Node copy(){ if(this.link != null){ return new Node(new Integer((Integer)this.data), this.link.copy()); }else{ return new Node(new Integer((Integer)this.data), null); } } public Node invert(){ Node child = this.link; while(child != null){ child = child.link; } child.link = this;.... } } I am able to make a deep copy of the list. Now I want to invert the list so that the first node is the last and the last the first. The inverted list has to be a deep copy. I started developing the invert function but I am not sure. Any Ideas? Update: Maybe there is a recursive way since the linear linked list is a recursive data structure. I would take the first element, iterate through the list until I get to a node that has no child and append the first element, I would repeat this for the second, third....

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  • How do I use text in one cell to trigger row to be copied on another sheet in Excel?

    - by Brian Eby
    I provide all of the cut lists for our cabinet manufacturing in Excel. I tally all parts for the entire job on the first worksheet in an Excel file, and then filter the rows based on the "Material" column, and manually copy/paste each row in to its own material-specific worksheet (example: I filter "Materials" column for "Maple Ply", and then copy all "Maple Ply" rows to the "Maple Ply" worksheet). Then the material specific worksheets are sent to the shop floor for cutting. This is time consuming, and if I need to change any data in the first page, I have to go and manually update the copied row in its material-specific page. Is there any way to make each material page "look" for its material, and automatically populate itself with any row that has the appropriate material in the material column (example: any time I enter "Maple Ply" in the material column of sheet one, that row is automatically copied to the "Maple Ply" worksheet)? If so, could this link be dynamic, rather than just a copy, so that if I change a cell in a particular row on sheet one, that data is also updated on the material-specific worksheet copy? Thank you, Brian

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  • Java: Copying an exe-file and launching afterwards fails

    - by Philip
    Hi, I want to copy an existing .exe-file from one directory to another and launch it afterwards with Java. Like this: FileIO.copy( new File( sourceFile ), new File( targetFile ) ); System.out.println( "Existing: " + new File( targetFile ).exists() ); System.out.println( "Launching " + targetFile ); String cmd[] = { targetFile }; Process p = Runtime.getRuntime().exec( cmd ); p.waitFor(); System.out.println( "Result: " + p.exitValue() ); The output is like this: Existing: true Launching C:\test\Launcher.new.exe Result: 2 So Java says that the file is valid and existing, but Windows just can't launch the process because it thinks the file is not there. The pathes are absolute and with backslashes. I also have all permissions on the files so I'm allowed to execute them. The Launcher.new.exe is generated by Launch4j, so it's more or less standalone. At least it doesn't depend on DLLs in the same folder. But strange: It works when I copy and launch the notepad.exe. One more strange thing: If I don't copy the file by Java but by hand, the launching also fails with the same error. OS is Vista with SP1. Any clue?

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  • openCV Won't copy to image after changed color ( opencv and c++ )

    - by user1656647
    I am a beginner at opencv. I have this task: Make a new image Put a certain image in it at 0,0 Convert the certain image to gray scale put the grayscaled image next to it ( at 300, 0 ) This is what I did. I have a class imagehandler that has constructor and all the functions. cv::Mat m_image is the member field. Constructor to make new image: imagehandler::imagehandler(int width, int height) : m_image(width, height, CV_8UC3){ } Constructor to read image from file: imagehandler::imagehandler(const std::string& fileName) : m_image(imread(fileName, CV_LOAD_IMAGE_COLOR)) { if(!m_image.data) { cout << "Failed loading " << fileName << endl; } } This is the function to convert to grayscale: void imagehandler::rgb_to_greyscale(){ cv::cvtColor(m_image, m_image, CV_RGB2GRAY); } This is the function to copy paste image: //paste image to dst image at xloc,yloc void imagehandler::copy_paste_image(imagehandler& dst, int xLoc, int yLoc){ cv::Rect roi(xLoc, yLoc, m_image.size().width, m_image.size().height); cv::Mat imageROI (dst.m_image, roi); m_image.copyTo(imageROI); } Now, in the main, this is what I did : imagehandler CSImg(600, 320); //declare the new image imagehandler myimg(filepath); myimg.copy_paste_image(CSImg, 0, 0); CSImg.displayImage(); //this one showed the full colour image correctly myimg.rgb_to_greyscale(); myimg.displayImage(); //this shows the colour image in GRAY scale, works correctly myimg.copy_paste_image(CSImg, 300, 0); CSImg.displayImage(); // this one shows only the full colour image at 0,0 and does NOT show the greyscaled one at ALL! What seems to be the problem? I've been scratching my head for hours on this one!!!

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  • Copy Word format into Outlook message

    - by Jaster
    Hi, I have an outlook automation. I would like to use a Word document as template for the message content. Lets say i have some formatted text containing tables, colors, sizes, etc. Now I'd like to copy/paste this content into an Outlook message object.I'm used to the interop stuff, i just have no idea how to copy/paste this correctly. Here is some Sample Code (no cleanup): String path = @"file.docx"; String savePath = @"file.msg"; Word.Application wordApp = new Word.Application(); Word.Document currentDoc = wordApp.Documents.Open(path); Word.Range range = currentDoc.Range(0, m_CurrentDoc.Characters.Count); String wordText = range.Text; oApp = new Outlook.Application(); Outlook.NameSpace ns = oApp.GetNamespace("MAPI"); ns.Logon("MailBox"); Outlook._MailItem oMsg = oApp.CreateItem(Outlook.OlItemType.olMailItem); oMsg.To = "[email protected]"; oMsg.Body = wordtext; oMsg.SaveAs(savePath); Using Outlook/Word 2007, however the word files still mayb in 2000/2003 format (.doc). Visual Studio 2010 with .net 4.0 (should obvious due to the samplecode). Any suggestions?

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  • Backup NAS to another NAS?

    - by Tronic
    hey there, is there a way to backup / transfer a NAS (it's like a big harddrive with some access to a webinterface, but closed linux etc.... only two ethernet ports) to another one? or is the only way to connect both NASs to my computer and copy the data from one to the other? it's like 750gb of data... thanks in advance... regards

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  • Copying files with SSH

    - by Deniz Zoeteman
    I am trying to copy a file from my other computer, to another computer. (both running Ubuntu 9.10) So say: I've ssh'ed into the other computer; i 'cd' to the directory; and i entered cp File.zip /home/me/Desktop as file.zip is located in the directory i just used cd with. Now, it gives me the following error message: cannot create regular file '/home/me/Desktop': no such file or directory What do i have to do?

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  • Batch change modified/created dates?

    - by Billiam
    I recently bought new hard drives for my NAS. This means that I'm copying all the data off the NAS, upgrading it, and then moving the data back. I've gotten as far as copying the data from the NAS, but every file's modified/created date has been changed to when it was copied (today). Is there a way, keeping in mind that I have the original data, to batch update the modified/created dates on the copied files without having to copy them over again (we're talking over a terabyte of data)?

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  • How to preserve file attributes when one copies files in Windows?

    - by netvope
    On Linux, we can simply do: cp -pr directory How to do that in Windows? Can it be done in Windows Explorer? Any GUI tool suggestions? It would be the best if I can keep the NTFS permissions and creation/modification/access time. At a minimum, I need to preserve the modification date for the files and the directories. Windows Explorer's copy does not preserve the modification date for directories.

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  • How to preserve file attributes when one copies files in Windows?

    - by netvope
    On Linux, we can simply do: cp -pr directory How to do that in Windows? Can it be done in Windows Explorer? Any GUI tool suggestions? It would be the best if I can keep the NTFS permissions and creation/modification/access time. At a minimum, I need to preserve the modification date for the files and the directories. Windows Explorer's copy does not preserve the modification date for directories.

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  • Absent Code attribute in method that is not native or abstract

    - by kerry
    I got the following, quite puzzling error today when running a unit test: java.lang.ClassFormatError: Absent Code attribute in method that is not native or abstract in class file javax/servlet/http/Cookie A google search found this post, which explains that it is caused by having an interface in the classpath, and not an actual implementation. In this case it’s the java-ee interface. To fix this I added the jetty servlet api implementation to my pom: jetty javax.servlet test Piece of cake. I have run in to this before, so I figured I would capture the fix here in case I run in to it again.

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  • Applescript from Mac App says "Expected end of line but found \U201c\"\U201d."

    - by Rasmus Styrk
    I am trying to perform a copy/paste for my to the the last active app, here's my code: NSString *appleScriptSource = [NSString stringWithFormat:@"\ntell application \"%@\" to activate\ntell application \"System Events\" to tell process \"%@\"\nkeystroke \"v\" using command down\nend tell", [lastApp localizedName], [lastApp localizedName]]; NSDictionary *error; NSAppleScript *aScript = [[NSAppleScript alloc] initWithSource:appleScriptSource]; NSAppleEventDescriptor *aDescriptor = [aScript executeAndReturnError:&error]; The problem is that on some computers it works just fine, but on others it fails. My error output from error that is returned by executeAndReturnError is: 2012-06-13 17:43:19.875 Mini Translator[1206:303] (null) (error: { NSAppleScriptErrorBriefMessage = "Expected end of line but found \U201c\"\U201d."; NSAppleScriptErrorMessage = "Expected end of line but found \U201c\"\U201d."; NSAppleScriptErrorNumber = "-2741"; NSAppleScriptErrorRange = "NSRange: {95, 1}"; }) I can't seem to figure out what it means or why it happens. We tried copying the generated apple-script code into the Apple Script editor, and here it works just fine. My App is sandboxed - i have added the bundle identifiers for the key "com.apple.security.temporary-exception.apple-events" for the apps i want to support. Any suggestions?

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  • Read/Write/Find/Replace huge csv file

    - by notapipe
    I have a huge (4,5 GB) csv file.. I need to perform basic cut and paste, replace operations for some columns.. the data is pretty well organized.. the only problem is I cannot play with it with Excel because of the size (2000 rows, 550000 columns). here is some part of the data: ID,Affection,Sex,DRB1_1,DRB1_2,SENum,SEStatus,AntiCCP,RFUW,rs3094315,rs12562034,rs3934834,rs9442372,rs3737728 D0024949,0,F,0101,0401,SS,yes,?,?,A_A,A_A,G_G,G_G D0024302,0,F,0101,7,SN,yes,?,?,A_A,G_G,A_G,?_? D0023151,0,F,0101,11,SN,yes,?,?,A_A,G_G,G_G,G_G I need to remove 4th, 5th, 6th, 7th, 8th and 9th columns; I need to find every _ character from column 10 onwards and replace it with a space ( ) character; I need to replace every ? with zero (0); I need to replace every comma with a tab; I need to remove first row (that has column names; I need to replace every 0 with 1, every 1 with 2 and every ? with 0 in 2nd column; I need to replace F with 2, M with 1 and ? with 0 in 3rd column; so that in the resulting file the output reads: D0024949 1 2 A A A A G G G G D0024302 1 2 A A G G A G 0 0 D0023151 1 2 A A G G G G G G (both input and output should read one line per row, ne extra blank row) Is there a memory efficient way of doing that with java(and I need a code to do that) or a usable tool for playing with this large data so that I can easily apply Excel functionality..

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