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  • Pass variables to current tab via chrome extension

    - by iamthejeff
    I am writing my first chrome extension, and I want to pass a variable to the currently opened tab and manipulate the DOM with it. My extension has a button, and when clicked, is executing this code: chrome.tabs.getSelected(null, function(tab) { chrome.tabs.executeScript(tab.id, { file: 'tabscript.js' }); }); This works fine, but I see no way to pass a variable to tabscript.js so it can be used on the opened tab.

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  • DSP - Filtering in the frequency domain via FFT

    - by Trap
    I've been playing around a little with the Exocortex implementation of the FFT, but I'm having some problems. Whenever I modify the amplitudes of the frequency bins before calling the iFFT the resulting signal contains some clicks and pops, especially when low frequencies are present in the signal (like drums or basses). However, this does not happen if I attenuate all the bins by the same factor. Let me put an example of the output buffer of a 4-sample FFT: // Bin 0 (DC) FFTOut[0] = 0.0000610351563 FFTOut[1] = 0.0 // Bin 1 FFTOut[2] = 0.000331878662 FFTOut[3] = 0.000629425049 // Bin 2 FFTOut[4] = -0.0000381469727 FFTOut[5] = 0.0 // Bin 3, this is the first and only negative frequency bin. FFTOut[6] = 0.000331878662 FFTOut[7] = -0.000629425049 The output is composed of pairs of floats, each representing the real and imaginay parts of a single bin. So, bin 0 (array indexes 0, 1) would represent the real and imaginary parts of the DC frequency. As you can see, bins 1 and 3 both have the same values, (except for the sign of the Im part), so I guess bin 3 is the first negative frequency, and finally indexes (4, 5) would be the last positive frequency bin. Then to attenuate the frequency bin 1 this is what I do: // Attenuate the 'positive' bin FFTOut[2] *= 0.5; FFTOut[3] *= 0.5; // Attenuate its corresponding negative bin. FFTOut[6] *= 0.5; FFTOut[7] *= 0.5; For the actual tests I'm using a 1024-length FFT and I always provide all the samples so no 0-padding is needed. // Attenuate var halfSize = fftWindowLength / 2; float leftFreq = 0f; float rightFreq = 22050f; for( var c = 1; c < halfSize; c++ ) { var freq = c * (44100d / halfSize); // Calc. positive and negative frequency indexes. var k = c * 2; var nk = (fftWindowLength - c) * 2; // This kind of attenuation corresponds to a high-pass filter. // The attenuation at the transition band is linearly applied, could // this be the cause of the distortion of low frequencies? var attn = (freq < leftFreq) ? 0 : (freq < rightFreq) ? ((freq - leftFreq) / (rightFreq - leftFreq)) : 1; // Attenuate positive and negative bins. mFFTOut[ k ] *= (float)attn; mFFTOut[ k + 1 ] *= (float)attn; mFFTOut[ nk ] *= (float)attn; mFFTOut[ nk + 1 ] *= (float)attn; } Obviously I'm doing something wrong but can't figure out what. I don't want to use the FFT output as a means to generate a set of FIR coefficients since I'm trying to implement a very basic dynamic equalizer. What's the correct way to filter in the frequency domain? what I'm missing? Thanks in advance.

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  • Posting status via Facebook's graph api

    - by Simon R
    In PHP, I am trying to post a status to our Facebook fan page using the graph api, despite following the intructions facebook give, the following code does not seem to update the status. Here is the code; $xPost['access_token'] = "{key}"; $xPost['message'] = "Posting a message test."; $ch = curl_init('https://graph.facebook.com/{page_id}/feed'); curl_setopt($ch, CURLOPT_VERBOSE, 1); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt($ch, CURLOPT_HEADER, 1); curl_setopt($ch, CURLOPT_TIMEOUT, 120); curl_setopt($ch, CURLOPT_POST, 1); curl_setopt($ch, CURLOPT_POSTFIELDS, $xPost); curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 1); curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 1); curl_setopt($ch, CURLOPT_CAINFO, NULL); curl_setopt($ch, CURLOPT_CAPATH, NULL); curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 0); $result = curl_exec($ch); Does anyone know why this code is not working? The access_token is correct.

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  • Change button's enabled property via checkbox

    - by Ivan Stoyanov
    I tried this javascript but it doesn't work - here I need to change the button's enabled property to true when the checkbox is checked and to false when it isn't. This is my code. <tr> <td colspan="2" align="center"> <asp:CheckBox ID="cbAcceptAgreement" runat="server" OnClientClick="acceptAgreement(this)" /> <asp:Label ID="lblUserAgreement" runat="server" Text="I accept the " /> <asp:HyperLink ID="hlUserAgreement" runat="server" Text="User Agreement" NavigateUrl="Help/UserAgreement.aspx" /> </td> </tr> <tr> <td colspan="2" align="center"> <asp:Button ID="btnRegister" runat="server" Text="Register" /> </td> </tr> <script type="text/javascript"> function acceptAgreement(Obj) { document.getElementById('<%=btnRegister.ClientID%>').disabled = !obj.checked; } </script> Can you help me solve this problem?

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  • Subscribing to a ObservableCollection via reflection

    - by Julian Lettner
    How can I subscribe to a ObservableCollection<??> without knowing the element type of the collection? Is there a way to do this without too many 'magic strings'? This is a question for the .NET version 3.5. I think 4.0 would make my life much easier, right? Type type = collection.GetType(); if(type.IsGenericType && type.GetGenericTypeDefinition() == typeof(ObservableCollection<>)) { // I cannot cast the collection here ObservableCollection<object> x = collection; } Thanks for your time.

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  • requesting ajax via HttpWebRequest

    - by Sami Abdelgadir Mohammed
    Hi guys: I'm writing a simple application that will download some piece of data from a website then I can use it later for any purpose The following is the request and response copied from Firebug as the browser did that... when u type http://x5.travian.com.sa/ajax.php?f=k7&x=18&y=-186&xx=12&yy=-192 you will get a php file has some data.. But when I make a request with HttpWebRequest I get wrong data (some unknown letters) Can anyone help me in that.. and if I have to make some encodings or what?? I will be so appreciated.. Response Server nginx Date Tue, 04 Jan 2011 23:03:49 GMT Content-Type application/json; charset=UTF-8 Transfer-Encoding chunked Connection keep-alive X-Powered-By PHP/5.2.8 Expires Mon, 26 Jul 1997 05:00:00 GMT Last-Modified Tue, 04 Jan 2011 23:03:49 GMT Cache-Control no-store, no-cache, must-revalidate, post-check=0, pre-check=0 Pragma no-cache Content-Encoding gzip Vary Accept-Encoding Request Host x5.travian.com.sa User-Agent Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.13) Gecko/20101203 Firefox/3.6.13 Accept text/html,application/xhtml+xml,application/xml;q=0.9,/;q=0.8 Accept-Language en-us,en;q=0.5 Accept-Encoding gzip,deflate Accept-Charset ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive 115 Connection keep-alive Cookie CAD=57878984%231292375897%230%230%23%230; T3E=%3DImYykTN2EzMmhjO5QTM2QDN2oDM1ITOyoDOxIjM4EDN5ITM6gjO4MDOxIWZyQWMipTZu9metl2ctl2c6MDNxADN6MDNxADNjMDNxADNjMDNxADN; orderby_b1=0; orderby_b=0; orderby2=0; orderby=0

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  • ELMAH: Only sending specific exception type via mail

    - by Sir Code-A-Lot
    Hi, I have ELMAH set up for a webapp, logging exceptions to a SQL server. I wish to have ELMAH send me an email too, but only when a specific exception is thrown (ie. MySpecialException). ELMAH must still log all exceptions to SQL server. I know you can do it programmatically in global.asax, but I'd prefer to use web.config. So, how do I restrict ELMAH error mails to filter out everything but a specific exception type, using web.config?

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  • Sending an image via POST Multipart (HTTPRequest)

    - by James Jeffery
    I'm trying to send an image to a server, using HTTP Post Multipart. Everything else is fine, I have all the boundrys set and stuff. But what do I have to do to the image before hand? Do I have to convert it to binary? Here is the header data from the header (using Fiddler). This is what I need to upload: -----------------------------7daea2aa40c80 Content-Disposition: form-data; name="pict"; filename="pic.jpeg" Content-Type: image/pjpeg <Binary here ... or at least I think it is> .. ?????JFIF?????????C? (lots more of this I removed) Any advice?

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  • C# ASP.NET Binding Controls via Generic Method

    - by OverTech
    I have a few web applications that I maintain and I find myself very often writing the same block of code over and over again to bind a GridView to a data source. I'm trying to create a Generic method to handle data binding but I'm having trouble getting it to work with Repeaters and DataLists. Here is the Generic method I have so far: public void BindControl<T>(T control, SqlCommand sql) where T : System.Web.UI.WebControls.BaseDataBoundControl { cmd = sql; cn.Open(); SqlDataReader dr = cmd.ExecuteReader(); if (dr.HasRows) { control.DataSource = dr; control.DataBind(); } dr.Close(); cn.Close(); } That way I can just define my CommandText then make a call to "BindControls(myGridView, cmd)" instead of retyping this same basic block of code every time I need to bind a grid. The problem is, this doesn't work with Repeaters or DataLists. Each of these controls inherit their respective "DataSource" and "DataBind" methods from different classes. Someone on another forum suggested that I implement an interface, but I'm not sure how to make that work either. The GridView, Datalist and Repeater get their respective "DataBind" methods from BaseDataBoundControl, BaseDataList, and Repeater classes. How would I go about creating a single interface to tie them all together? Or am I better off just using 3 overloads for this method? Dave

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  • Installing Ruby via rbenv fails

    - by Maximus S
    Problem: I installed ruby, but it is not recognized correctly. I'm following the deploying to VPS: https://github.com/railscasts/335-deploying-to-a-vps I am setting my server on ubuntu 12.04 LTS to deploy my rails app. I'm following the railscast on deploying to a VPS, and trying to install ruby through rbenv. It seemed everything was installed correctly, but when I tried to check the ruby version, it gave me errors. The following are the commands that I ran. deployer@max:~$ rbenv install 1.9.3-p125 Downloading yaml-0.1.4.tar.gz... -> http://cloud.github.com/downloads/sstephenson/ruby-build-download-mirror/36c852831d02cf90508c29852361d01b Installing yaml-0.1.4... Installed yaml-0.1.4 to /home/deployer/.rbenv/versions/1.9.3-p125 Downloading ruby-1.9.3-p125.tar.gz... -> http://cloud.github.com/downloads/sstephenson/ruby-build-download-mirror/e3ea86b9d3fc2d3ec867f66969ae3b92 Installing ruby-1.9.3-p125... Installed ruby-1.9.3-p125 to /home/deployer/.rbenv/versions/1.9.3-p125 Downloading rubygems-1.8.23.tar.gz... -> http://cloud.github.com/downloads/sstephenson/ruby-build-download-mirror/178b0ebae78dbb46963c51ad29bb6bd9 Installing rubygems-1.8.23... Installed rubygems-1.8.23 to /home/deployer/.rbenv/versions/1.9.3-p125 deployer@max:~$ rbenv global 1.9.3-p125 deployer@max:~$ ruby -v 'ruby' program can be found in the following packages: * ruby1.8 * ruby1.9.1 How do I solve this?

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  • Exception thrown when using WScript via COM in PHP

    - by user198729
    try { $cmd = 'php path_to_file.php args'; $WshShell = new COM("WScript.Shell"); $oExec = $WshShell->Run($cmd, 1, false); } catch( Exception $e ) { echo 'Caught exception: ', $e->getMessage(), "\n"; } It reports: Caught exception: Source: Unknown Description: Unknown Has anyone met this kind of problem ?

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  • tried to update hudson via dashboard and now it doesn;t work (windows)

    - by Tim
    I get the following now in the output log. I really wish I hadn't attempted to update teh version. What a hassle. Can anyone diagnose the issue here? Running from: C:\hudson\hudson.war [Winstone 2010/06/14 23:33:54] - Beginning extraction from war file hudson home directory: C:\hudson [Winstone 2010/06/14 23:33:56] - Error during HTTP listener init or shutdown java.net.SocketException: Unrecognized Windows Sockets error: 0: JVM_Bind at java.net.PlainSocketImpl.socketBind(Native Method) at java.net.PlainSocketImpl.bind(Unknown Source) at java.net.ServerSocket.bind(Unknown Source) at java.net.ServerSocket.(Unknown Source) at java.net.ServerSocket.(Unknown Source) at winstone.HttpListener.getServerSocket(HttpListener.java:102) at winstone.HttpListener.run(HttpListener.java:116) at java.lang.Thread.run(Unknown Source) [Winstone 2010/06/14 23:33:56] - HTTP Listener shutdown successfully [Winstone 2010/06/14 23:33:56] - Winstone Servlet Engine v0.9.10 running: controlPort=disabled [Winstone 2010/06/14 23:33:56] - Error during AJP13 listener init or shutdown java.net.SocketException: Unrecognized Windows Sockets error: 0: JVM_Bind at java.net.PlainSocketImpl.socketBind(Native Method) at java.net.PlainSocketImpl.bind(Unknown Source) at java.net.ServerSocket.bind(Unknown Source) at java.net.ServerSocket.(Unknown Source) at java.net.ServerSocket.(Unknown Source) at winstone.ajp13.Ajp13Listener.run(Ajp13Listener.java:99) at java.lang.Thread.run(Unknown Source) [Winstone 2010/06/14 23:33:56] - AJP13 Listener shutdown successfully Running from: C:\hudson\hudson.war [Winstone 2010/06/14 23:38:49] - Beginning extraction from war file hudson home directory: C:\hudson [Winstone 2010/06/14 23:38:51] - Winstone Servlet Engine v0.9.10 running: controlPort=disabled [Winstone 2010/06/14 23:38:51] - Error during AJP13 listener init or shutdown java.net.SocketException: Unrecognized Windows Sockets error: 0: JVM_Bind at java.net.PlainSocketImpl.socketBind(Native Method) at java.net.PlainSocketImpl.bind(Unknown Source) at java.net.ServerSocket.bind(Unknown Source) at java.net.ServerSocket.(Unknown Source) at java.net.ServerSocket.(Unknown Source) at winstone.ajp13.Ajp13Listener.run(Ajp13Listener.java:99) at java.lang.Thread.run(Unknown Source) [Winstone 2010/06/14 23:38:51] - AJP13 Listener shutdown successfully [Winstone 2010/06/14 23:38:51] - Error during HTTP listener init or shutdown java.net.SocketException: Unrecognized Windows Sockets error: 0: JVM_Bind at java.net.PlainSocketImpl.socketBind(Native Method) at java.net.PlainSocketImpl.bind(Unknown Source) at java.net.ServerSocket.bind(Unknown Source) at java.net.ServerSocket.(Unknown Source) at java.net.ServerSocket.(Unknown Source) at winstone.HttpListener.getServerSocket(HttpListener.java:102) at winstone.HttpListener.run(HttpListener.java:116) at java.lang.Thread.run(Unknown Source) [Winstone 2010/06/14 23:38:51] - HTTP Listener shutdown successfully

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  • instantiate spring bean via factory method

    - by Don
    Hi, I need to instantiate a Spring bean in the same manner as this Java code: MyClass foo = Mockito.mock(MyClass.class); The XML I need will look something like: <bean id="foo" class="Mockito" factory-method="mock"> <constructor-arg value="MyClass"/> </bean> I can't seem to find the correct syntax for passing a Class object as a parameter to the factory method. Thanks, Don

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  • Concurrent WCF calls via shared channel

    - by Kent Boogaart
    I have a web tier that forwards calls onto an application tier. The web tier uses a shared, cached channel to do so. The application tier services in question are stateless and have concurrency enabled. But they are not being called concurrently. If I alter the web tier to create a new channel on every call, then I do get concurrent calls onto the application tier. But I wanted to avoid that cost since it is functionally unnecessary for my scenario. I have no session state, and nor do I need to re-authenticate the caller each time. I understand that the creation of the channel factory is far more expensive than than the creation of the channels, but it is still a cost I'd like to avoid if possible. I found this article on MSDN that states: While channels and clients created by the channels are thread-safe, they might not support writing more than one message to the wire concurrently. If you are sending large messages, particularly if streaming, the send operation might block waiting for another send to complete. Firstly, I'm not sending large messages (just a lot of small ones since I'm doing load testing) but am still seeing the blocking behavior. Secondly, this is rather open-ended and unhelpful documentation. It says they "might not" support writing more than one message but doesn't explain the scenarios under which they would support concurrent messages. Can anyone shed some light on this?

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  • multi-core processing in R on windows XP - via doMC and foreach

    - by Jan
    Hi guys, I'm posting this question to ask for advice on how to optimize the use of multiple processors from R on a Windows XP machine. At the moment I'm creating 4 scripts (each script with e.g. for (i in 1:100) and (i in 101:200), etc) which I run in 4 different R sessions at the same time. This seems to use all the available cpu. I however would like to do this a bit more efficient. One solution could be to use the "doMC" and the "foreach" package but this is not possible in R on a Windows machine. e.g. library("foreach") library("strucchange") library("doMC") # would this be possible on a windows machine? registerDoMC(2) # for a computer with two cores (processors) ## Nile data with one breakpoint: the annual flows drop in 1898 ## because the first Ashwan dam was built data("Nile") plot(Nile) ## F statistics indicate one breakpoint fs.nile <- Fstats(Nile ~ 1) plot(fs.nile) breakpoints(fs.nile) # , hpc = "foreach" --> It would be great to test this. lines(breakpoints(fs.nile)) Any solutions or advice? Thanks, Jan

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  • Scrapy Not Returning Additonal Info from Scraped Link in Item via Request Callback

    - by zoonosis
    Basically the code below scrapes the first 5 items of a table. One of the fields is another href and clicking on that href provides more info which I want to collect and add to the original item. So parse is supposed to pass the semi populated item to parse_next_page which then scrapes the next bit and should return the completed item back to parse Running the code below only returns the info collected in parse If I change the return items to return request I get a completed item with all 3 "things" but I only get 1 of the rows, not all 5. Im sure its something simple, I just can't see it. class ThingSpider(BaseSpider): name = "thing" allowed_domains = ["somepage.com"] start_urls = [ "http://www.somepage.com" ] def parse(self, response): hxs = HtmlXPathSelector(response) items = [] for x in range (1,6): item = ScrapyItem() str_selector = '//tr[@name="row{0}"]'.format(x) item['thing1'] = hxs.select(str_selector")]/a/text()').extract() item['thing2'] = hxs.select(str_selector")]/a/@href').extract() print 'hello' request = Request("www.nextpage.com", callback=self.parse_next_page,meta={'item':item}) print 'hello2' request.meta['item'] = item items.append(item) return items def parse_next_page(self, response): print 'stuff' hxs = HtmlXPathSelector(response) item = response.meta['item'] item['thing3'] = hxs.select('//div/ul/li[1]/span[2]/text()').extract() return item

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  • Daily/Weekly/Monthly Record Count Search via StoredProcedure

    - by user270960
    Using MS SQL Server.I have made a Stored Procedure naming "SP_Get_CallsLogged". I have a table named "TRN_Call", and it has one column named "CallTime" which is a DateTime. I have a web-page in my application where the User enters:- 1.StartDate (DateTime) 2.EndDate (DateTime) 3.Period(Daily/Weekly/Monthly) (varchar) (from DropDownList) I want to get the Record Count of those calls in my table *TRN_Call* on the basis of the specified Period(Daily/Weekly/Monthly) selected by user in the DropDownList. e.g. StartDate ='1/18/2010 11:10:46 AM' EndDate ='1/25/2010 01:10:46 AM' Period =Daily So the record count between these above mentioned dates(StartDate+EndDate) should come in a manner so that I can refer to those counts separately i.e. the following:- Date 1/18/2010 Records Found 5 Date 1/19/2010 Records Found 50 Date 1/20/2010 Records Found 15 Date 1/21/2010 Records Found 32 Date 1/22/2010 Records Found 12 Date 1/23/2010 Records Found 15 Date 1/24/2010 Records Found 17 Date 1/25/2010 Records Found 32 and send those Counts to the Web Application so that these counts could be listed then in the Crystal Reports.

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  • Not receiving all message via TCP in Java?

    - by javatcp
    I have a tcp socket sending three lines like this out2.println("message1\n"); out2.println("message2\n"); out2.println("message3\n"); and another tco socket receiving and displaying these messages like this System.out.println(in.readLine()); System.out.println(in.readLine()); System.out.println(in.readLine()); but only the first message is recieved and displayed, anything I send after that is not.

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  • Execute Oracle RAC cluster commands via Solaris RBAC?

    - by David Citron
    Executing Oracle RAC cluster management commands such as $ORA_CRS_HOME/bin/crs_start requires root permissions. Using Solaris RBAC (Role-Based Access Control), one can give a non-root user permissions to execute those commands, but the commands still fail internally. Example: $pfexec /opt/11.1.0/crs/bin/crs_stop SomeArg CRS-0259: Owner of the resource does not belong to the group. Is there a complete RBAC solution for Oracle RAC or does the executor need to be root? EDIT: Note that my original /etc/security/exec_attr contained: MyProfile:suser:cmd:::/opt/11.1.0/crs/bin/crs_start:uid=0 MyProfile:suser:cmd:::/opt/11.1.0/crs/bin/crs_start.bin:uid=0 As Martin suggests below, this needed to be changed to add gid=0 as: MyProfile:suser:cmd:::/opt/11.1.0/crs/bin/crs_start:uid=0;gid=0 MyProfile:suser:cmd:::/opt/11.1.0/crs/bin/crs_start.bin:uid=0;gid=0

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  • Static classes in PHP via abstract keyword?

    - by Boldewyn
    According to the PHP manual, a class like this: abstract class Example {} cannot be instantiated. If I need a class without instance, e.g. for a registry pattern: class Registry {} // and later: echo Registry::$someValue; would it be considered good style to simply declare the class as abstract? If not, what are the advantages of hiding the constructor as protected method compared to an abstract class? Rationale for asking: As far as I see it, it could a bit of feature abuse, since the manual refers to abstract classes more as like blueprints for later classes with instantiation possibility.

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