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  • optimize output value using a class and public member

    - by wiso
    Suppose you have a function, and you call it a lot of times, every time the function return a big object. I've optimized the problem using a functor that return void, and store the returning value in a public member: #include <vector> const int N = 100; std::vector<double> fun(const std::vector<double> & v, const int n) { std::vector<double> output = v; output[n] *= output[n]; return output; } class F { public: F() : output(N) {}; std::vector<double> output; void operator()(const std::vector<double> & v, const int n) { output = v; output[n] *= n; } }; int main() { std::vector<double> start(N,10.); std::vector<double> end(N); double a; // first solution for (unsigned long int i = 0; i != 10000000; ++i) a = fun(start, 2)[3]; // second solution F f; for (unsigned long int i = 0; i != 10000000; ++i) { f(start, 2); a = f.output[3]; } } Yes, I can use inline or optimize in an other way this problem, but here I want to stress on this problem: with the functor I declare and construct the output variable output only one time, using the function I do that every time it is called. The second solution is two time faster than the first with g++ -O1 or g++ -O2. What do you think about it, is it an ugly optimization?

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  • How to declare a pointer to a variable as a parameter of a function in C++?

    - by Keand64
    I have a function that takes a pointer to a D3DXVECTOR3, but I have no reason to declare this beforehand. The most logical solution to me was using new: Function( //other parameters, new D3DXVECTOR3(x, y, 0)); but I don't know how I would go about deleting it, beign intitialized in a function. My next thought was to use the & operator, like so: Function( //other parameters, &D3DVECTOR3(x, y, 0)); but I don't know if this is a valid way to go about doing this. (It doesn't get an error, but neither does int *x; x = 50;). So should I use new, &, or some other technique I'm overlooking?

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  • ubuntu input/output error

    - by rplevy
    I'm having a problem with Ubuntu that I'm finding hard to troubleshoot for reasons that will become clear: reboot -bash: /sbin/reboot: Input/output error dmesg -bash: /bin/dmesg: Input/output error ps -e ps: error while loading shared libraries: /lib/libproc-3.2.8.so: cannot read file data: Input/output error lsof -bash: /usr/bin/lsof: Input/output error fsck -bash: /sbin/fsck: Input/output error badblocks -bash: /sbin/badblocks: Input/output error So I can't see what is going on, and I can't remotely reboot. What can I do to get to the bottom of this? Interestingly: init 0 Segmentation fault I can cat /var/syslog but not /var/log/messages or several other important files. less and more don't work, neither do tail or head, etc.

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  • how to get access to environment variables from output file

    - by getjoefree
    I want to get variables from a output file specific location,and input file format as below: log1.txt format: [v] Output Data <Value>DIMM_A,4096,1600,Hynix,HMT351S6CFR8C-PB,0942E041,1206,01,Hynix,,</Value> or log2.txt format: [v] Output Data <Value>DIMM_B,4096,1600,Hynix,HMT351S6CFR8C-PB,017E90AE,1205,01,Hynix,,</Value> <Value>DIMM_A,4096,1600,Hynix,HMT351S6CFR8C-PB,012E908D,1205,01,Hynix,,</Value> and we want to get output OUT.TXT file format as below: if log1.txt format and then output file format: SET DIMM1=DIMM_A,4096,1600,Hynix,HMT351S6CFR8C-PB,0942E041,1206,01,Hynix,, if log2.txt format and then output file format: SET DIMM2=DIMM_B,4096,1600,Hynix,HMT351S6CFR8C-PB,017E90AE,1205,01,Hynix,, SET DIMM1=DIMM_A,4096,1600,Hynix,HMT351S6CFR8C-PB,012E908D,1205,01,Hynix,, who could you help to me? thanks!

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  • Adding VFACE semantic causes overlapping output semantics error

    - by user1423893
    My pixel shader input is a follows struct VertexShaderOut { float4 Position : POSITION0; float2 TextureCoordinates : TEXCOORD0; float4 PositionClone : TEXCOORD1; // Final position values must be cloned to be used in PS calculations float3 Normal : TEXCOORD2; //float3x3 TBN : TEXCOORD3; float CullFace : VFACE; // A negative value faces backwards (-1), while a positive value (+1) faces the camera (requires ps_3_0) }; I'm using ps_3_0 and I wish to utilise the VFACE semantic for correct lighting of normals depending on the cull mode. If I add the VFACE semantic then I get the following errors: error X5639: dcl usage+index: position,0 has already been specified for an output register error X4504: overlapping output semantics Why would this occur? I can't see why there would be too much data.

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  • What is the difference between Output Text and Output Text (Active)?

    - by [email protected]
    When building an ADF Faces application in JDeveloper, you might have noticed that in the Component Palette there is an option for both "Output Text" as well as "Output Text (Active)".   Why do we have both of these options?Under the covers, there are actually two tags, af:outputText and af:activeOutputText.  Similarly, there is an active version of af:image, namely af:activeImage, and an active version of af:commandToolbarButton, af:activeCommandToolbarButton.In the vast majority of cases, developers should use the non-active version of the components.   The active version of the components are there to support specific usecases around Server Side Push using the Active Data Service feature.  Most of our customers don't use Server Side Push, and hence do not need the active version of the components.  You can learn more about Server Side Push with ADF Active Data Service in this blog.By using the active version of af:outputText, af:image or af:commandToolbarButton when you don't need to, you are taking a performance hit that is unnecessary.

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  • OmniGraffle for iPad Now Supports VGA Output

    - by pat.shepherd
    I have (surprisingly) gotten a lot of comments over the last post about using OmniGraffle as an interactive EA tool.  The news flash/update is that it now supports VGA output.  I had sent a note to the developers and they responded that this was a highly sought after feature…well, they delivered. I have tried it informally and it works, thought there is a little lag between the drawing on the screen and the output, but it is not terrible. So buy yourself a VGA adapter and start trying it out in JAD (Joint Architecture Design) sessions. Here is a link to a couple little OG tutorials: "What's OmniGraffle for iPad", you say? Let us show you! Use the link below to see watch a guided tour of the powerful diagraming tool for the iPad. Videos - OmniGraffle for iPad - Products - The Omni Group

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  • Analog and digital audio output at the same time

    - by wim
    My speakers use a digital input, but my headphones use an analog input. I have them both plugged in, and when I want to use the headphones I just turn off the speakers and switch on the headphones. I know that simultaneous output on digital and analog is supported by the hardware, because it worked fine in Windows XP. But on Ubuntu, I seem to only get one at a time, depending on which setting is selected in the combo box located at System -> Preferences -> Sound -> Hardware. How can I get simultaneous analog and digital output without having to switch the profile every time? I'm on Ubuntu 11.04 and it's an HDA Intel chip.

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  • Stream sound card output to icecast2 via darkice

    - by Alberto Burgos
    I want to stream to icecast server via darkice, the default .cfg comes with /dev/dsp, witch is OSS, but there is no /dev/dsp in Ubuntu 12.10, so I tried hw:0,0, but it's just the microphone, and I would like to stream all of the sound-card output. Any ideas? cat /proc/asound/cards 0 [SB ]: HDA-Intel - HDA ATI SB HDA ATI SB at 0xf8700000 irq 16 cat /proc/asound/devices 1: : sequencer 2: [ 0- 0]: digital audio playback 3: [ 0- 0]: digital audio capture 4: [ 0- 0]: hardware dependent 5: [ 0] : control 33: : timer I tried following this post: How can I stream my soundcard output?

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  • No HDMI output on 12.10, Intel HD graphics (Ironlake)

    - by Veazer
    I am unable to get any output to my external monitor on 12.10. The monitor is recognized and shows the native res (1920x1080, correct) but enabling has no effect. Graphics chipset is Intel Ironlake (Arrandale). I have tried: Full system update after installing Oibaf PPA updated drivers (https://launchpad.net/~oibaf/+archive/graphics-drivers) Enabling SNA Kubuntu 12.10 (in addition to Ubuntu 12.10) Both were fresh installs. Nothing works, any troubleshooting ideas? Everything is fine on 11.10. UPDATE 1: Also tried using Intel drivers from Xorg-Edgers PPA (https://launchpad.net/~xorg-edgers/+archive/ppa) Still no output on HDMI.

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  • "find" command and piping its output through another program

    - by Charbel
    this is not an Ubuntu specific quesion, it applies to all unix/linux. how can I run a command like this: find . -maxdepth 1 -type d -print -exec svn info "{}" | grep URL \; the command above doesn't do what I want, I can't seem to pipe the output of the svn info to grep. This works, but the output contains much more than I need: find . -maxdepth 1 -type d -print -exec svn info "{}" \; Any ideas?

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  • Audio output and input stopped working after the last update

    - by renatov
    I'm using Ubuntu 14.04 and everything was perfect until todays's update. Now my audio output (speakers) and input (microphone) stopped working. I guess it's a driver issue, but I need help to debug this problem and to solve it. I have a Dell Inspiron 5421 notebook with an Intel audio integrated sound card: $ lspci | grep Audio 00:1b.0 Audio device: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller (rev 04) If I go to Ubuntu Settings Sound Output, it doesn't show my Intel card there anymore: The same for the Input tab, it doesn's show my Intel card there anymore: Could you please help me?

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  • .Net SQL Parameter for String List Problem

    - by JK
    I am writing a C# program in which I send a query to SQL Server to be processed and a dataset returns. I am using parameters to pass information to the query before it is sent to SQL server. This works fine except in the situation below. The query looks like this: reportQuery = " Select * From tableName Where Account_Number in (@AccountNum); and Account_Date = @AccountDate "; The AccountDate parameter works find but not the AccountNum parameter. I need the final query to execute like this: Select * From tableName Where Account_Number in ('AX3456','YZYL123','ZZZ123'); and Account_Date = '1-Jan-2010' The problem is that I have these account numbers (actually text) in a C# string list. To feed it to the parameter, I have been declaring the parameter as a string. I turn the list into one string and feed it to the parameter. I think the problem is that I am feeding the paramater this: "'AX3456','YZYL123','ZZZ123'" when it wants this 'AX3456','YZYL123','ZZZ123' How do I get the string list into the query using a parameter and have it execute as shown above? This is how I am declaring and assigning the parameter. SqlParameter AccountNumsParam = new SqlParameter(); AccountNumsParam.ParameterName = "@AccountNums"; AccountNumsParam.SqlDbType = SqlDbType.NVarChar; AccountNumsParam.Value = AccountNumsString; FYI, AccountNumString == "'AX3456','YZYL123','ZZZ123'"

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  • Kernel Error during upgrade or update commands

    - by Ashesh
    I am getting these errors during sudo apt-get update and upgrade... I tried all possible options no success. I recently upgraded to 13.04 and had problems with Broadcom WiFi. Fixed tat issues using the clean script... but looks like it did not install the Kernel properly.. Here is the o/p of the few scripts I ran: ashesh@ashesh-HPdv4:~$ sudo dpkg -r bcmwl-kernel-source (Reading database ... 175338 files and directories currently installed.) Removing bcmwl-kernel-source ... Removing all DKMS Modules Done. update-initramfs: deferring update (trigger activated) Processing triggers for initramfs-tools ... update-initramfs: Generating /boot/initrd.img-3.8.0-25-generic cp: reading ‘/lib/modules/3.8.0-25-generic/kernel/drivers/mtd/mtd.ko’: Input/output error cp: failed to extend ‘/tmp/mkinitramfs_8gjKwQ//lib/modules/3.8.0-25-generic/kernel/drivers/mtd/mtd.ko’: Input/output error cp: reading ‘/lib/modules/3.8.0-25-generic/kernel/drivers/net/ethernet/sfc/sfc.ko’: Input/output error cp: failed to extend ‘/tmp/mkinitramfs_8gjKwQ//lib/modules/3.8.0-25-generic/kernel/drivers/net/ethernet/sfc/sfc.ko’: Input/output error cp: reading ‘/lib/modules/3.8.0-25-generic/kernel/drivers/net/ethernet/mellanox/mlx4/mlx4_core.ko’: Input/output error cp: failed to extend ‘/tmp/mkinitramfs_8gjKwQ//lib/modules/3.8.0-25-generic/kernel/drivers/net/ethernet/mellanox/mlx4/mlx4_core.ko’: Input/output error cp: reading ‘/lib/modules/3.8.0-25-generic/kernel/drivers/net/ethernet/broadcom/bnx2x/bnx2x.ko’: Input/output error cp: failed to extend ‘/tmp/mkinitramfs_8gjKwQ//lib/modules/3.8.0-25-generic/kernel/drivers/net/ethernet/broadcom/bnx2x/bnx2x.ko’: Input/output error cp: reading ‘/lib/modules/3.8.0-25-generic/kernel/drivers/net/ethernet/broadcom/cnic.ko’: Input/output error cp: failed to extend ‘/tmp/mkinitramfs_8gjKwQ//lib/modules/3.8.0-25-generic/kernel/drivers/net/ethernet/broadcom/cnic.ko’: Input/output error cp: reading ‘/lib/modules/3.8.0-25-generic/kernel/drivers/net/ethernet/qlogic/netxen/netxen_nic.ko’: Input/output error cp: failed to extend ‘/tmp/mkinitramfs_8gjKwQ//lib/modules/3.8.0-25-generic/kernel/drivers/net/ethernet/qlogic/netxen/netxen_nic.ko’: Input/output error cp: reading ‘/lib/modules/3.8.0-25-generic/kernel/drivers/net/ethernet/brocade/bna/bna.ko’: Input/output error cp: failed to extend ‘/tmp/mkinitramfs_8gjKwQ//lib/modules/3.8.0-25-generic/kernel/drivers/net/ethernet/brocade/bna/bna.ko’: Input/output error cp: reading ‘/lib/modules/3.8.0-25-generic/kernel/drivers/scsi/libfc/libfc.ko’: Input/output error cp: failed to extend ‘/tmp/mkinitramfs_8gjKwQ//lib/modules/3.8.0-25-generic/kernel/drivers/scsi/libfc/libfc.ko’: Input/output error cp: reading ‘/lib/modules/3.8.0-25-generic/kernel/drivers/scsi/advansys.ko’: Input/output error cp: failed to extend ‘/tmp/mkinitramfs_8gjKwQ//lib/modules/3.8.0-25-generic/kernel/drivers/scsi/advansys.ko’: Input/output error cp: reading ‘/lib/modules/3.8.0-25-generic/kernel/drivers/scsi/be2iscsi/be2iscsi.ko’: Input/output error cp: failed to extend ‘/tmp/mkinitramfs_8gjKwQ//lib/modules/3.8.0-25-generic/kernel/drivers/scsi/be2iscsi/be2iscsi.ko’: Input/output error cp: reading ‘/lib/modules/3.8.0-25-generic/kernel/drivers/scsi/bnx2i/bnx2i.ko’: Input/output error cp: failed to extend ‘/tmp/mkinitramfs_8gjKwQ//lib/modules/3.8.0-25-generic/kernel/drivers/scsi/bnx2i/bnx2i.ko’: Input/output error Bus error (core dumped) depmod: ../libkmod/libkmod-elf.c:207: elf_get_mem: Assertion `offset < elf->size' failed. Aborted (core dumped) I am not a techie but I need your support to resolve this without re-installation from scratch....

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  • PowerShell - Parameter Value Tab Expansion for Enum types

    - by Adam Driscoll
    Is it possible to implement parameter value tab expansion for enum parameter types? Creating a binary cmdlet with parameter definition: [Parameter] public SomeEnum Type {get;set;} Is there some way to type: Add-MyThing -Type S<tab> To get: Add-MyThing -Type SomeEnumValue Where: public enum SomeEnum { SomeEnumValue, SomeEnumValue2 } I know it may be possible with overriding the TabExpansion function but I was wondering if there was something I could do within my cmdlet to expose this type of functionality.

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  • Is there a way to make PHP progressively output as the script executes?

    - by Iain Fraser
    So I'm writing a disposable script for my own personal single use and I want to be able see how the process is going. Basically I'm processing a couple of thousand media releases and sending them to our new CMS. So I don't hammer the CMS, I'm making the script sleep for a couple of seconds after every 5 requests. I would like - as the script is executing - to be able to see my echos telling me the script is going to sleep or that the last transaction with the webservice was successful. Is this possible in PHP? Thanks for your help! Iain

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  • how to get doctype tag with url using xsl:output

    - by keshav.veerapaneni
    Hi, i have added the below xsl:output tag in xslt <xsl:output method="html" indent="yes" encoding="utf-8" doctype-public="-//W3C//DTD HTML 4.0 Transitional//EN" </xsl:output as a result i get the below doctype tag in the html output- <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" how can i mention the url in the doctype tag using xsl:output which would output a doctype tag that looks like below <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "_http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" Best Regards, Keshav

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  • Passing BLOB/CLOB as parameter to PL/SQL function

    - by Ula Krukar
    I have this procedure i my package: PROCEDURE pr_export_blob( p_name IN VARCHAR2, p_blob IN BLOB, p_part_size IN NUMBER); I would like for parameter p_blob to be either BLOB or CLOB. When I call this procedure with BLOB parameter, everything is fine. When I call it with CLOB parameter, I get compilation error: PLS-00306: wrong number or types of arguments in call to 'pr_export_blob' Is there a way to write a procedure, that can take either of those types as parameter? Some kind of a superclass maybe?

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  • Compare output of program to correct program using bash script, without using text files

    - by Doug
    I've been trying to compare the output of a program to known correct output by using a bash script without piping the output of the program to a file and then using diff on the output file and a correct output file. I've tried setting the variables to the output and correct output and I believe it's been successful but I can't get the string comparison to work correctly. I may be wrong about the variable setting so it could be that. What I've been writing: TEST=`./convert testdata.txt < somesampledata.txt` CORRECT="some correct output" if [ "$TEST"!="$CORRECT" ]; then echo "failed" fi

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  • How to call the previous querystring parameter in .aspx

    - by Ingó Vals
    Let's say I have a ActionResult method that has a pageNumber parameter and a category parameter. The user should be able to set the category he's browsing which would be a ActionLink to the first page of that category. However if I have an another ActionLink where I go to the next page the category parameter would go back to default. How can I set the category parameter to be the same as on the previous page.

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