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  • Is a C++ compiler allowed to emit different machine code compiling the same program?

    - by sharptooth
    Consider a situation. We have some specific C++ compiler, a specific set of compiler settings and a specific C++ program. We compile that specific programs with that compiler and those settings two times, doing a "clean compile" each time. Should the machine code emitted be the same (I don't mean timestamps and other bells and whistles, I mean only real code that will be executed) or is it allowed to vary from one compilation to another?

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  • Should you always write code for else cases that "can never happen"?

    - by johnswamps
    Take some code like if (person.IsMale()) { doGuyStuff(); } else { doGirlOtherStuff(); } (Yes, I realize this is bad OO code, it's an example) Should this be written so that to explicitly check if person.isFemale(), and then add a new else that throws an exception? Or maybe you're checking values in an enum, or something like that. You think that no one will add new elements to the enum, but who knows? "Can never happen" sounds like famous last words.

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  • Regarding PID Shell Script

    - by arav
    I am calling another shell script testarg.sh within my main script. the logfiles of testarg.sh are stored in $CUSTLOGS in the below format testarg.DDMONYY.PID.log example: testarg.09Jun10.21165.log In the main script after the testarg process gets completed i need to grep the log file for the text "ERROR" and "COMPLETED SUCCESSFULLY". How do i get the PID of the process and combine with DDMONYY for grepping. Also i need to check whether file exists before grepping $CUSTBIN/testarg.sh $CUSTBIN/testarg.sh rc=$? if [ $rc -ne 0 ]; then return $CODE_WARN fi

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  • In a Visual Studio C++ project with /clr, are its dependencies also compiled to managed code?

    - by Michael
    To be a bit more clear. If I have a Visual Studio C++ solution that has two projects, say a static library with CLR support turned off, and a second project with CLR support turned on that depends on this static library, does the static library get compiled as managed code? What about libraries that the CLR project uses that are external to this solution, do they also get compiled as managed code?

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  • Whats the difference between theese two java code snippets?

    - by Joe Hopfgartner
    I have this code i am doing for university. The first code works as expected, the second one provides different results. I can not see what they are doing differently?? first: public Mat3 getNormalMatrix() { return new Mat3(this.getInverseMatrix()).transpose(); } second: public Mat3 getNormalMatrix() { Mat4 mat = this.getInverseMatrix(); Mat3 bla = new Mat3(mat); bla.transpose(); return bla; }

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  • What event should I handle to execute code when WinForms application switches from Run mode to Desig

    - by dotnetuser
    I am running a Windows form application and I need to execute a piece of code when I switch to design mode. I have a handler for the OnEnterDesignMode debugger event and this gets hit if I am debugging the application and then switch to design mode. However, this does not get hit if I initially start without debugging and then switch to design mode. What event do I need to handle in order that certain code is executed when switching from Run mode to Design mode?

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  • Is There A Way To Apply CODE Formatting To A VB.Net TextBox?

    - by Jeff
    I'm playing with a simple string replacement editor for editing VB.Net functions outside of VB. Is there a way to apply VB.Net code formatting to a string? For example. The txtboxCodeEntry looks like this: If strVar="dummy" then 1 else 0 Endif I would like it to "autoformat" to: If strVar = "dummy" Then 1 Else 0 End If The formatting would match whatever formatting VB.Net does when you're editing code in the Visual Studio IDE. Thanks.

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  • Is it possible to determine whose code (according to `git blame`) was affected by each hunk output by `git diff`?

    - by Ben
    I have a large cross-cutting commit that I would like to split up according to the authors whose code was affected, both to increase the reviewers' familiarity with the code they're reviewing, and to divide the review burden equitably. I realize that the blame may be mixed within a given hunk, in which case it would be nice to either collect multiple reviewers or just choose the most "blameworthy" one (breaking ties arbitrarily is fine).

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  • Shell complains 'cannot execute binary file'

    - by Negai
    Hi everyone, I've playing around with linux and noticed that for some mysterious reason commands like '/bin/sh ' just will not work. Each time I'm trying to start a process it yields 'cannot execute binary file' error message. m@sanctuary:~$ sh sed /bin/sed: /bin/sed: cannot execute binary file When I first launch sh and try to execute sed, it succeeds. I'm starting to loose my wits. It would be just great, if somebody could help me. Thank you.

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  • Why aren't IOKit notifications being delivered with this code?

    - by gojohnnyboi
    I wrote this code to subscribe to USB devices being plugged in and unplugged; the point is for IOKit to deliver notifications to my iAttached() and iDetached() functions when the corresponding events occur. However, I don't get notifications. The code can be seen here: http://gist.github.com/402391 I didn't want to over-populate this page with it, as it is moderately long.

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  • C#. Where struct methods code kept in memory?

    - by maxima120
    It is somewhat known where .NET keeps value types in memory (mostly in stack but could be in heap in certain circumstances etc)... My question is - where is the code of the struct? If I have say 16 byte of data fields in the struct and a massive computation method in it - I am presuming that 16 byte will be copied in stack and the method code is stored somewhere else and is shared for all instances of the struct. Are these presumptions correct?

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  • removing a case clause: bash expansion in sed regexp: X='a\.b' ; Y=';;' sed -n '/${X}/,/${Y}/d'

    - by ChrisSM
    I'm trying to remove a case clause from a bash script. The clause will vary, but will always have backslashes as part of the case-match string. I was trying sed but could use awk or a perl one-liner within the bash script. The target of the edit is straightforward, resembles: $cat t.sh case N in a\.b); #[..etc., varies] ;; esac I am running afoul of the variable expansion escaping backslashes, semicolons or both. If I 'eval' I strip my backslash escapes. If I don't, the semi-colons catch me up. So I tried subshell expansion within the sed. This fouls the interpreter as I've written it. More escaping the semi-colons doesn't seem to help. X='a\.b' ; Y=';;' sed -i '/$(echo ${X} | sed -n 's/\\/\\\\/g')/,/$(echo ${Y} | sed -n s/\;/\\;/g')/d t.sh And this: perl -i.bak -ne 'print unless /${X}/ .. /{$Y}/' t.sh # which empties t.sh and eval perl -i.bak -ne \'print unless /${X}/ .. /{$Y}/' t.sh # which does nothing

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  • When Something Occurs in a BackgroundWorker, Trigger Code on a Different Thread?

    - by Soo
    I have a background worker that runs and looks for stuff, and when it finds stuff, I want to update my main WinForm. The issue that I'm having is that when I try to update my WinForm from my background worker, I get errors that tell me I can't modify things that were made outside of my background worker (in other words, everything in my form). Can someone provide a simple code example of how I can get my code to work the way I want it to? Thanks!

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  • Flex 4: use google APIs in RIA without server side code?

    - by grapkulec
    Just to confirm what I think I understand from reading about use of google APIs in RIAs (FLEX 4 and ActionScript) there is no way to connect to blogger API for example, directly from RIA because of google's crossdomain.xml file, right? So if I want to use their APIs to get some data like content of my mailbox or list of posts on my blog I have to have some code running server side and RIA would just use that code as httpservice to collect data from google? Or maybe I got it completly wrong?

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  • How to convert the amount of indentation in a source code file?

    - by toby
    I find that I now often work with code bases that have different amounts of indentation. Some use 2 spaces, some use 4 space, some even use tabs! Once in a while, I have to share code between these codebases, or, sometimes I use an incorrect amount of indentation by mistake. Is there a tool or a text editor feature that will convert between different amounts of indentation?

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