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  • In Python, are there builtin functions for elementwise boolean operators over boolean lists?

    - by bshanks
    For example, if you have n lists of bools of the same length, then elementwise boolean AND should return another list of that length that has True in those positions where all the input lists have True, and False everywhere else. It's pretty easy to write, i just would prefer to use a builtin if one exists (for the sake of standardization/readability). Here's an implementation of elementwise AND: def eAnd(*args): return [all(tuple) for tuple in zip(*args)] example usage: >>> eAnd([True, False, True, False, True], [True, True, False, False, True], [True, True, False, False, True]) [True, False, False, False, True] thx

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  • Accessing a webpage in C++

    - by wyatt
    Is there a good, simple library which allows C++ to load a webpage? I just want to grab the source as text. I'm not using any IDE or significant library, just straight command line. Tangentially, is there something fundamental I'm missing about programming in C++? I would think any language in common use today would have droves of web-based functionality, being so central to computer usage, but I can find next to no discussion on how to accomplish it. I realise C++ significantly predates the modern internet, so it lacking any core ability in the regard is reasonable, but the fact that relevant libraries seem so sparse is baffling. Thanks for your help.

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  • Are Ext JS files necessary in a working site?

    - by songdogtech
    I've inherited a high-traffic site that loads some Ext javascript files and I'm trying to trim some bandwidth usage. Are Ext libraries necessary for development only or are they required for the finished site (I've never used Ext.) The site loads ext-base.js, ext-all-debug.js, expander.js, exteditor.js. It appears that expander.js and exteditor.js have some site specific code, so they should stay? But what about ext-base.js and ext-all-debug.js? Am I reading this correctly - are base and debugging libraries necessary for a live site?

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  • C++ MFC add combo box string item from a widget ID

    - by OzBarry
    I've added a combo box in the gui editor in MSVC 2010 pro in my MFC project. I have a list of strings I am grabbing from an external source and want to add them to my combo box. I've searched for a while, and every post seems to suggest I need to use the CComboBox class, however, I have no idea how to get the class variable from the resource ID of the combobox element in the gui editor. In summary, how do I add a string to my combo box, either using a macro (like CB_ADDSTRING(RESOURCE_ID, "my string");) or using CComboBOx (something like CComboBox::GetObject(RESOURCE_ID)->AddString("blah");). I do not do much win32 api/mfc programming, and just started fiddling around with it.

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  • Where can I find "reference barcodes" to verify barcode library output?

    - by mjustin
    This question is not about 'best' barcode library recommendation, we use various products on different platforms, and need a simple way to verify if a given barcode is correct (according to its specification). There are some free online bar code generators in the Internet, and I found many differences between their output and our library output regarding graphics and text field below the code. Now I am not sure which one is wrong, and before filing bug report I want to make sure how the correct barcode should look like. We mainly need Code128 and UCC/EAN-128 with A/B/C subcodes. Which resource would you suggest?

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  • Must JDBC Resultsets and Statements be closed separately although the Connection is closed afterwards?

    - by Mulmoth
    It is said to be a good habit to close all JDBC resources after usage. But if I have the following code, is it necessary to close the Resultset and the Statement? Connection conn = null; PreparedStatement stmt = null; ResultSet rs = null; try { conn = // Retrieve connection stmt = conn.prepareStatement(// Some SQL); rs = stmt.executeQuery(); } catch { // Error Handling } finally { try { if (rs != null) rs.close(); } catch (Exception e) {}; try { if (stmt != null) stmt.close(); } catch (Exception e) {}; try { if (conn != null) conn.close(); } catch (Exception e) {}; } The question is if the closing of the connection does the job or if it leaves some resources in use.

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  • py2app generates .app with no errors but .app crashes and quits unexpectedly

    - by user3705730
    I am trying to use py2app and it generates .app with no errors but .app crashes and quits unexpectedly. I am trying to do this in virtualenv so I am not sure if that is an issue with all the paths. It works on my computer when all the virtual environments exist but as soon as I close them down, the .app no longer works. The virtual environment I am using has python 2.7.5 Here is my setup.py: """ This is a setup.py script generated by py2applet Usage: python setup.py py2app """ from setuptools import setup APP = ['myApp.py'] DATA_FILES = [] OPTIONS = {'argv_emulation': True, 'packages': ['pulp']} setup( app=APP, data_files=DATA_FILES, options={'py2app': OPTIONS}, setup_requires=['py2app'], )

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  • Is there anything in the FTP protocol like the HTTP Range header?

    - by Cheeso
    Suppose I want to transfer just a portion of a file over FTP - is it possible using a standard FTP protocol? In HTTP I could use a Range header in the request to specify the data range of the remote resource. If it's a 1mb file, I could ask for the bytes from 600k to 700k. Is there anything like that in FTP? I am reading the FTP RFC, don't see anything, but want to make sure I'm not missing anything. There's a Restart command in FTP - would that work?

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  • how to get apache log like debugging in Android logcat

    - by Nav
    I am currently using a webview to load a webpage which contains lots of javascript and having lots of trouble debugging what exactly gets loaded and when in the webview . Then I saw this post where the op seems to be using apache log to monitor webpage load events in his webview. Enhance webView performance (should be the same performance as native Web Browser) Can I get a similar utility plugin or anything so that I can use it with logcat in ddms view. If possible please provide some resource as to how to configure it for android.

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  • jQuery works on local host, but not on website

    - by Cortopasta
    Using Notepad++ and XAMPP to test stuff, then I upload it to the website over FTP. In the head of my code, I have this to call jQuery and the script: <script type="text/javascript" src="/jquery.js"></script> <script type="text/javascript" src="/portfolio.js"></script> and it works fine locally on my XAMPP server. But as soon as it's uploaded onto the host, it throws this error: Resource interpreted as script but transferred with MIME type text/html. Not sure what's going on, or why it's having a hard time using jQuery. Any ideas?

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  • C++ streams question (explanation of comment in code)

    - by skyeagle
    I am playing around with the fastCGI application found here. The following comment is in the code: if (content) delete []content; // If the output streambufs had non-zero bufsizes and // were constructed outside of the accept loop (i.e. // their destructor won't be called here), they would // have to be flushed here. My knowledge of C++ streams is rather weak. Could someone please explain the following: which streambufs are being referred to in the comment? under what conditions would the streambufs had non-zero bufsizes? last but not the least, can someone point to a resource (pun intended) online that provides a clear but gentle introduction to C++ IO streams?

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  • Is there any interesting jobs available for C++ other than device drivers / firmwares developments?

    - by AKN
    Hi, Initially C was used for designing drivers / firmwares and all that. Right now this has been taken over by C++. Ok. Let me not deviate this question. I would like to know where else C++ is being used and how you see its future? You can also list out pros and cons of C++ compared to other languages. Would like to see a healthy and meaningful discussion on C++ current usage and its future?! Cheers! AKN

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  • string manipulations in C

    - by Vivek27
    Following are some basic questions that I have with respect to strings in C. If string literals are stored in read-only data segment and cannot be changed after initialisation, then what is the difference between the following two initialisations. char *string = "Hello world"; const char *string = "Hello world"; When we dynamically allocate memory for strings, I see the following allocation is capable enough to hold a string of arbitary length.Though this allocation work, I undersand/beleive that it is always good practice to allocate the actual size of actual string rather than the size of data type.Please guide on proper usage of dynamic allocation for strings. char *string = (char *)malloc(sizeof(char));

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  • Use of WebDAV to access OWA (exchange 2003) mails with Basic authentication and SSL

    - by Mayuresh
    I have got a working C# code for accessing OWA mails using WebDAV against a FBA enabled exchange 2003 (http://support.microsoft.com/kb/891748/en-us/) But my client's OWA (exchange 2003) has Basic authentication and SSL (i-e when I try to access the web mail link through browser I get a grey login box instead of a web page I can log into the mail box once I enter the correct details) But my same fails with a 401 error against this mailbox. I got the simple request working for the Basic authentication using – String usernamePassword = strUserName + ":" + strPassword; WebReq.Headers.Add("Authorization", "Basic " + Convert.ToBase64String(new ASCIIEncoding().GetBytes(usernamePassword))); But the subsequent WebDAV SEARCH request fails with 404 (resource not found) error. Can we use WebDAV against an exchange 2k3 with SSL and Basic authentication?

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  • Show transparent color filter on a View after clicking it

    - by Maarten
    So. You know how when you click a post in the Google+ app, the entire View becomes blue. I want to do that as well, but with an ImageView. I have the following code snippet, setting the actual image as the background and the selector as the main resource. This looks good, but doesn't respect scaleType for the background image: <ImageView android:id="@+id/painting_image" android:layout_width="match_parent" android:layout_height="200dp" android:background="@drawable/img" android:src="@drawable/selector" android:scaleType="centerCrop" /> By the way, @drawable/selector is just a selector that shows a tranparent color for state_pressed: <item android:state_pressed="true"> <shape xmlns:android="http://schemas.android.com/apk/res/android"> <solid android:color="#44521400" /> </shape></item> How can I make this work while respecting the scaleType?

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  • How call soap service using jQuery

    - by Alen D
    I have a problem with calling soap service from php page. I was implemented two page,first page was created in php, and second page was created in asp.net. In asp.net application I have SOAP service, which methods should be called from php. Method on my SOAP service, look like this: [WebMethod] [ScriptMethod(ResponseFormat = ResponseFormat.Json)] public bool UpdateVotes(string vote) { //Code } On PHP application I call UpdateVotes method on the next way: $.ajax({ type: "POST", url: "http://localhost:5690/VoteServices.asmx/UpdateVotes", data: "{'vote': '" + vote + "'}", contentType: "application/json; charset=utf-8", dataType: "json", success: function (msg) { }, error: function (xhr, status, error) { } }); First I run asp.net application with SOAP service, and than I start php aplication. When i click on button for calling web method on service i browser console i got this error: Failed to load resource: the server responded with a status of 500 (Internal Server Error) http://localhost:5690/VoteServices.asmx/UpdateVotes XMLHttpRequest cannot load http://localhost:5690/VoteServices.asmx/UpdateVotes. Origin http://localhost:8080 is not allowed by Access-Control-Allow-Origin.

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  • Common causes of slow performing jQuery and how to optimize the code?

    - by Polaris878
    Hello, This might be a bit of a vague or general question, but I figure it might be able to serve as a good resource for other jQuery-ers. I'm interested in common causes of slow running jQuery and how to optimize these cases. We have a good amount of jQuery/JavaScript performing actions on our page... and performance can really suffer with a large number off elements. What are some obvious performance pitfalls you know of with jQuery? What are some general optimizations a jQuery-er can do to squeeze every last bit of performance out of his/her scripts? One example: a developer may use a selector to access an element that is slower than some other way. Thanks

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  • How to design parts of the application in XAML and how to reusing it then?

    - by MartyIX
    I'm working on a main window in my application and I would like to design parts of my window separately in Visual Studio designer. Main window Game desk (actually more of them and therefore it would be nice to design the game desk, mark it as a resource and then just via simple code (something like creating a new object and setting DataContext) create it. Console And so on Is it possible in VS to do this thing? I just need to know what to look for if it is possible. I don't need a whole solution. Thank you for suggestions!

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  • How to add response headers based on Content-type; getting Content-type before the response is commi

    - by Bozho
    I want to set the Expires header for all image/* and text/css. I'm doing this in a Filter. However: before calling chain.doFilter(..) the Content-type is not yet "realized" after calling chain.doFilter(..) the Content-type is set, but so is content-length, which forbids adding new headers (at least in Tomcat implementation) I can use the extensions of the requested resource, but since some of the css files are generated by richfaces by taking them from inside jar-files, the name of the file isn't x.css, but is /xx/yy/zz.xcss/DATB/.... So, is there a way to get the Content-type before the response is committed.

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  • Why is memory management so visible in Java?

    - by Emil
    I'm playing around with writing some simple Spring-based web apps and deploying them to Tomcat. Almost immediately, I run into the need to customize the Tomcat's JVM settings with -XX:MaxPermSize (and -Xmx and -Xms); without this, the server easily runs out of PermGen space. Why is this such an issue for Java compared to other garbage collected languages? Comparing counts of "tune X memory usage" for X in Java, Ruby, Perl and Python, shows that Java has easily an order of magnitude more hits in Google than the other languages combined.

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  • How can I emulate forward on 404 in jersey?

    - by koppor
    I have a picture on a given URL. The picture might need a referesh. I want to do the freshness-check at the time of the request. Therefore, I coded a jersey resource handling the request on the picture URL. It refreshes the picture on the filesystem if necessary. I do not want to re-code a caching mechansim, but rely on tomcat's implementation. Therefore, I would like to "forward" the request in the internal handler chain. I tried return new Viewable(sb.toString());, but a viewable is not a picture. What return type can I use? I could let the concrete picture reside on another URL and send a 307 (Temporary Redirect). Always sending that as answer seems odd to me. Related question: How to return a PNG image from Jersey REST service method to the browser

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  • Dynamic Programming resources in C?

    - by EsotericMe
    Hi everyone, I'll be writing the online Google test tomorrow as a fresher. Apparently, they definitely ask one problem on Dynamic Programming? Does anyone know of a good resource for collection of DP problems in C along with solutions? I know what DP is & have used it on an occasion or twice. However I feel to crack a DP problem in test, prior practice of typical problems will make it easier to approach. Any good resources or problem sets with solutions in C will be highly appreciated. Thanks.

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  • Java Split not working as expected

    - by daaabears
    I am trying to use a simple split to break up the following string: 00-00000 My expression is: ^([0-9][0-9])(-)([0-9])([0-9])([0-9])([0-9])([0-9]) And my usage is: String s = "00-00000"; String pattern = "^([0-9][0-9])(-)([0-9])([0-9])([0-9])([0-9])([0-9])"; String[] parts = s.split(pattern); If I play around with the Pattern and Matcher classes I can see that my pattern does match and the matcher tells me my groupCount is 7 which is correct. But when I try and split them I have no luck.

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  • A web application that uses someone else's mail server?

    - by John
    I'm building a web application, call it http://mywebapp.com, where a user should be able to create a newsletter and email it to everyone in his user account's contact list. So he can check mark all his friends, select an html template, fill in the body content, and send. The only catch to this is that after the user sends the email, the recipient must NOT be allowed to trace the source of the email back to http://mywebapp.com. The reason for this condition is because the user is a "reseller" of my business who wants to appear as if he's an independent business. If liability issues arise due to the reseller's unduly usage, I do not want to be caught up in the legal issues. Hence, I do not want anything about my business or technology to be traceable back to me by newsletter recipients. What's the best way to achieve this?

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  • Grep for multiple patterns over multiple files

    - by prelic
    I've been googling around, and I can't find the answer I'm looking for. Say I have a file, text1.txt, in directory mydir whose contents are: one two and another called text2.txt, also in mydir, whose contents are: two three four I'm trying to get a list of files (for a given directory) which contain all (not any) patterns I search for. In the example I provided, I'm looking for output somewhere along the lines of: ./text1.txt or ./text1.txt:one ./text1.txt:two The only things I've been able to find are concerning matching any patterns in a file, or matching multiple patterns in a single file (which I tried extending to a whole directory, but received grep usage errors). Any help is much appreciated. Edit-Things I've tried grep "pattern1" < ./* | grep "pattern2" ./* "ambiguous redirect" grep 'pattern1'|'pattern2' ./* returns files that match either pattern

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