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Articles indexed Wednesday March 17 2010

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  • how to copy a dictionary in python 3.1 and edit ONLY the copy

    - by MadSc13ntist
    can someone please explain this to me??? this doesn't make any sense to me.... I copy a dictionary into another and edit the second and both are changed???? ActivePython 3.1.0.1 (ActiveState Software Inc.) based on Python 3.1 (r31:73572, Jun 28 2009, 19:55:39) [MSC v.1500 32 bit (Intel)] on win32 Type "help", "copyright", "credits" or "license" for more information. dict1 = {"key1":"value1", "key2":"value2"} dict2 = dict1 dict2 {'key2': 'value2', 'key1': 'value1'} dict2["key2"] = "WHY?!?!?!!?!?!?!" dict1 {'key2': 'WHY?!?!?!!?!?!?!', 'key1': 'value1'}

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  • Version control PHP Web Project

    - by Adam Lerman
    We have a php project that we would like to version control. Right now there are three of us working on a "Dev" version of the project that all have our Eclipse linked to it with just an external folder, and thus no version control. What is the right way, and what is the best way, to version control this (not necessarily the same I dont think) We have a SVN set up but just need to find a good way to check in and check out that lets us test on the dev server. Any ideas?

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  • PBKDF2-HMAC-SHA1

    - by Jason
    To generate a valid pairwise master key for a WPA2 network a router uses the PBKDF2-HMAC-SHA1 algorithm. I understand that the sha1 function is performed 4096 times to derive the PMK, however I have two questions about the process. Excuse the pseudo code. 1) How is the input to the first instance of the SHA1 function formatted? SHA1("network_name"+"network_name_length"+"network_password") Is it formatted in that order, is it the hex value of the network name, length and password or straight ASCII? Then from what I gather the 160 bit digest received is fed straight into another round of hashing without any additional salting. Like this: SHA1("160bit digest from last round of hashing") Rise and repeat. 2) Once this occurs 4096 times 256 bits of the output is used as the pairwise master key. What I don't understand is that if SHA1 produces 160bit output, how does the algorithm arrive at the 256bits required for a key? Thanks for the help.

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  • jqgrid won't sort

    - by Ohana
    hi, i have a jqgrid to display data, however it won't sort, i followed the examples provided by jqgrid, did i miss anything? jQuery("#list-table").jqGrid({ url:'data/getJSONFile.php?set='+setName+'&list='+listName, datatype: "json", colNames:['id', 'title','author','publisher'], colModel:[ {name:'id',index:'id',width:55, sortable:true}, {name:'title',index:'title',width:150,sorttype:'string'}, {name:'author',index:'author', width:150}, {name:'publisher', index:'publisher', width:200} ], rowNum:10, //autowidth:true, width: 800, rowList:[10,20,30], pager:jQuery('#pager1'), sortname:'id', viewrecords: true, sortorder: "desc", caption:"books list" }); jQuery("#list-table").jqGrid('navGrid', '#pager1',{edit:false, add:false,del:false});

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  • php + upload.class + not overwriting the image

    - by Paulo
    Hi, i am trying to upload a file with upload.class and i need to overwrite the file when the user upload a new one. But instead of overwriting, he is putting photo_01, photo_02, etc... The code: $foto = new Upload($_FILES['photo']); $fotot = new Upload($_FILES['photo']); $fotot->image_resize = true; $fotot->image_y = 110; $fotot->image_x = 110; $foto->file_new_name_body = "photo"; $fotot->file_new_name_body = "photo"; $foto->file_ovewrite = true; $fotot->file_ovewrite = true; $fotot->Process("{$dir_fotos}thumbs/"); $foto->Process("{$dir_fotos}"); Somebody has already passed by this or has a solution??? notice that i'm using file_ovewrite = true; thanks

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  • How to clean-up an Entity Framework object context?

    - by Daniel Brückner
    I am adding several entities to an object context. try { forach (var document in documents) { this.Validate(document); // May throw a ValidationException. this.objectContext.AddToDocuments(document); } this.objectContext.SaveChanges(); } catch { // How to clean-up the object context here? throw; } If some of the documents pass the the validation and one fails, all documents that passed the validation remain added to the object context. I have to clean-up the object context because it may be reused and the following can happen. var documentA = new Document { Id = 1, Data = "ValidData" }; var documentB = new Document { Id = 2, Data = "InvalidData" }; var documentC = new Document { Id = 3, Data = "ValidData" }; try { // Adding document B will cause a ValidationException but only // after document A is added to the object context. this.DocumentStore.AddDocuments(new[] { documentA, documentB, documentC }); } catch (ValidationException) { } // Try again without the invalid document B. this.DocumentStore.AddDocuments(new[] { documentA, documentC }); This will again add document A to the object context and in consequence SaveChanges() will throw an exception because of a duplicate primary key. So I have to remove all already added documents in the case of an validation error. I could of course perform the validation first and only add all documents after they have been successfully validated. But sadly this does not solve the whole problem - if SaveChanges() fails all documents still remain add but unsaved. I tried to detach all objects returned by this.objectContext.ObjectStateManager.GetObjectStateEntries(EntityState.Added) but I am getting a exception stating that the object is not attached. So how do I get rid of all added but unsaved objects?

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  • Is it safe to reuse javax.xml.ws.Service objects

    - by Noel Ang
    I have JAX-WS style web service client that was auto-generated with the NetBeans IDE. The generated proxy factory (extends javax.xml.ws.Service) delegates proxy creation to the various Service.getPort methods. The application that I am maintaining instantiates the factory and obtains a proxy each time it calls the targetted service. Creating the new proxy factory instances repeatedly has been shown to be expensive, given that the WSDL documentation supplied to the factory constructor, an HTTP URI, is re-retrieved for each instantiation. We had success in improving the performance by caching the WSDL. But this has ugly maintenance and packaging implications for us. I would like to explore the suitability of caching the proxy factory itself. Is it safe, e.g., can two different client classes, executing on the same JVM and targetting the same web service, safely use the same factory to obtain distinct proxy objects (or a shared, reentrant one)? I've been unable to find guidance from either the JAX-WS specification nor the javax.xml.ws API documentation. The factory-proxy multiplicity is unclear to me. Having Service.getPort rather than Service.createPort does not inspire confidence.

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  • ANTLR C grammar, optional init_declarator_list?

    - by eisbaw
    Hello, In the ANSI C grammar for ANTLR v3 ( http://antlr.org/grammar/1153358328744/C.g ), how can init_declarator_list be optional in rule declaration ? Instead of: | declaration_specifiers init_declarator_list? ';' -I would say: | declaration_specifiers init_declarator_list ';' What part of the C standard allows statements like: int; EDIT: I just tried, it is allowed! Okay then, why is it allowed?

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  • calling webservice in java servlet

    - by Pravin
    I have created a servlet which displays a form having some fields and a submit button and also created a web service having methods which are needed in my servlet. I have deployed the web service on Tomcat 5.5.9/Axis and servlet web application on Tomcat ( same instance of Tomcat) using eclipse. Since one is web service and other is web application both are running on separate instances of tomcat, so when i run them separately i.e servlet without the call to web service and a client that access that webservice it works fine but when i integrate them both i get a error like exception: javax.servlet.ServletException I would like to call the web service and return the result when i press the button Please advice me on how to implement that.

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  • Calling SSIS from BizTalk Orchestration

    - by aceinthehole
    I have a scenario were I need to move a vast amount of data, and I need to use BizTalk to control the flow and contain the business logic. The problem is that BizTalk will not be able to handle the amount of data that needs to be moved. We have decided to a BizTalk Orchestration to kick off an SSIS package that does the actual heavy lifting. However, there is a caveat in that we have to be able to pass information into SSIS such as file location and info about how to split certain data up. My question is, what is the best way to call into SSIS from an Orchestration given those parameters? Should I build a webservice around it? Is there an adapter or stored procedure that I can call? Or is there a way to call it directly from the Orchestration?

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  • How to synchronize SQL Server 2008 database with SQL Server 2005 database?

    - by James McFarland
    I am using VS 2008 Team Suite and SQL Server 2008 in my development environment. I am deploying to a shared-host website with shared-host SQL Server 2005. I want to push changes from my development environment to my production host. I tried using Data | Schema Compare... and it reports to me that it does not support SQL Server 2008. What do people use for this (Besides Red-Gate tools - I use those at my day job, and they rock...this is a volunteer thing for my son's school)? I am looking for something very inexpensive if not free.

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  • Remote SQL server connection failure

    - by Sevki
    I am trying to connect to my MSSQL server 2008 web instance and im failing horribly... i get the error 26 and before you jump on me i have done these Check the spelling of the SQL Server instance name that is specified in the connection string. Use the SQL Server Surface Area Configuration tool to enable SQL Server to accept remote connections over the TCP or named pipes protocols. For more information about the SQL Server Surface Area Configuration Tool, see Surface Area Configuration for Services and Connections. Make sure that you have configured the firewall on the server instance of SQL Server to open ports for SQL Server and the SQL Server Browser port (UDP 1434). Make sure that the SQL Server Browser service is started on the server. in addition to theese i have disabled the firewall completely and tried other ports nothing works the same credentials work on the server but not on the client. this is the exact error message A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified) (.Net SqlClient Data Provider) Can anybody help?

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  • Google's Search Box in SharePoint

    - by Evan M.
    Has anyone here looked at the Google Search Box for SharePoint? We're looking into it as part of our MOSS deployment since we also use Google's GSA, and I'm personally not impressed with it, while a colleague seems to think that it's the only option we should be using, or even considering. While I've got no problems with the GSA indexing our SharePoint content, the Search Box just seems clumsy. It looks horrible, the results being returned are much more limited than what I get if I use the GSA search page itself, configuring it has been nothing but a PITA and it's still only got a basic config ans isn't respecting things like user permissions or search scopes that the default SharePoint Indexer and search controls handle out of the box. What are your guys thoughts? Am I being overly critical, and should just spend more time trying to configure it? Are you using a split-personality with it yourself, where you have the GSA for enterprise wide search, but use SharePoint for local searches? Other thoughts?

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  • FreeBSD Server .htaccess issues

    - by Will Ayers
    Server Details: FreeBSD PHP Version 4.3.11 Apache Appache Modules: mod_throttle, mod_php4, mod_speedycgi, mod_ssl, mod_setenvif, mod_so, mod_unique_id, mod_headers, mod_expires, mod_auth_db, mod_auth_anon, mod_auth, mod_access, mod_rewrite, mod_alias, mod_actions, mod_cgi, mod_dir, mod_autoindex, mod_include, mod_info, mod_status, mod_negotiation, mod_mime, mod_mime_magic, mod_log_config, mod_define, mod_env, mod_vhost_alias, mod_mmap_static, http_core The issue I am having is when ever I write any kind of code in the .htaccess file, it throws a 500 Internal error I am simply trying to rewrite url's and am using the exact code that wordpress creates for me and even tried custom code used before on previous servers and it still does not work. WordPress created code: # BEGIN WordPress <IfModule mod_rewrite.c> RewriteEngine On RewriteBase /lobster-tail-blog/ RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /lobster-tail-blog/index.php [L] </IfModule> # END WordPress And even a simple thing like this throws the error: <IfModule mod_rewrite.c> RewriteEngine On </IfModule> Anyone know of any fixes or why this is causing this error? I have the mod_rewrite module loaded

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  • Intel video driver upgrade now makes my external monitor display red-only with HDMI cable.

    - by Eli
    I have an HP G60 notebook with a Mobile Intel 4 Series Express Chipset video display (Driver version is 8.15.10.2021). OS is Win7 Home Premium. I also have an LG widescreen display that I was connecting to the laptop using an HDMI cable. It was working great, until I applied an Intel 4 Series Express Chipset update from Windows Update. After the update, if I plug the laptop to the monitor using the HDMI cable, it appears I only get the Magenta channel, cause that is all I see. If I connect with the VGA cable, it works fine. So, is it possible it is just the HDMI cable (which IS cheap in this case - fire sale at Blockbuster), and not related to the video driver update at all?

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  • Is there a peripheral that lets my computer monitor the connectivity of pairs of wires?

    - by raldi
    I've got a bunch of physical switches and circuits that act like switches (they're either connected to ground or they're just an open wire). Is there some sort of thing I can plug into my computer (ideally, via USB) that has a bunch of screw terminals, and I can attach wires to the screws and have the computer keep track of which circuits are closed and which are open? Bonus points if the device also lets the computer open and close switches, too. I don't even know what to google for.

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  • BIWA Wednesday TechCast Series - Opposition to Data Warehouse Initiatives

    - by jenny.gelhausen
    BIWA Wednesday TechCast Series - 19th Event! Opposition to Data Warehouse Initiatives Please join us for this webcast on Wednesday, March 24, 12 noon Eastern or check your local area's time Webcast is open to clients, prospects and partners. No matter how good your technology and technical skills, organizational issues can derail a data warehousing or BI project. Therefore BIWA presents a vital topic that crosses product boundaries: organizational resistance to data warehouse initiatives - how to recognize it and what to do about it. Many a DW/BI professional has been surprised by organizational resistance to DW/BI initiatives. Yet real organizational imperatives may be behind this apparently irrational behavior. Based on in-depth interviews with IT professionals, industry consultants, and power users, our speaker Bruce Jenks will present his research findings about what drives organizational resistance to data warehouse initiatives. The talk will cover specific behaviors that can signal organizational resistance to a data warehouse program and what organizations have done to address such resistance. Presenter: Bruce Jenks of Dun and Bradstreet Bruce Jenks has over 20 years experience in data warehousing and business intelligence, much of it as a consultant to large organizations spanning the US. Bruce's data warehousing clients have included firms such as Sprint, Gallo Wines, Southern California Edison, The Gap, and Safeway. He started his data warehousing career at Metaphor Computers, a pioneering DW/BI firm from which a number of industry luminaries sprang including Ralph Kimball (author of The Data Warehouse Toolkit ). Bruce continued his data warehousing career at HP, Stanford University and other firms. Bruce is currently completing his doctorate in business administration at Golden Gate University, and today's material arises from his doctoral research. He is also a principal consultant for Dun and Bradstreet. Audio Dial-In: 866 682 4770 Audio Meeting ID: 1683901 Audio Meeting Passcode: 334451 Web Conference: Please register at https://www1.gotomeeting.com/register/807185273 After you register you will be provided with a link to the TechCast. Invitation to Speakers: All BIWA members and Oracle professionals (experts, end users, managers, DBAs, developers, data analysts, ISVs, partners, etc.) may submit abstracts for 45 minute technical webcasts to our Oracle BIWA (IOUG SIG) Community. Submit your BIWA TechCast abstract today! BIWA is a worldwide forum with over 2000 members who are business intelligence, warehousing and analytics professionals. BIWA presents information, experiences and best practices in successfully deploying Oracle Database-centric BI, Data Warehousing, and Analytics products, features and Options--the Oracle Database "BIWA" platform. Attendance Information & Replays at the BIWA website: oraclebiwa.org var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); try { var pageTracker = _gat._getTracker("UA-13185312-1"); pageTracker._trackPageview(); } catch(err) {}

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  • JQuery Toggle Button Trigger

    - by Ozzy
    Hi all, i have this code: $('.access a').toggle(function() { $('link').attr('href', 'styles/accessstyles.css'); $('body').css('font-size', '16px'); }, function() { $('link').attr('href', 'styles/styles.css'); $('body').css('font-size', text_sizes[text_current_size] + 'px'); }); It works fine. But how would i programmatically trigger the toggle instead of clicking on it?

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  • Wait until image loads before performing function

    - by Steven
    I'm trying to create a simple portfolio page. I have a list of thumbs and an image. When you click on a thumb, the image will change. When a thumbnail is clicked, I'd like to have the image fade out, wait until the image is loaded, then fade back in. The problem I have right now is that some of the images are pretty big, so it fades out, then fades back in immediately, sometimes while the image is still loading. I'd like to avoid using setTimeout, since sometimes an image will load faster or slower than the time I set. Here's my code: $(function() { $('img#image').attr("src", $('ul#thumbs li:first img').attr("src")); $('ul#thumbs li img').click(function() { $('img#image').fadeOut(700); var src = $(this).attr("src"); $('img#image').attr("src", src); $('img#image').fadeIn(700); }); }); <img id="image" src="" alt="" /> <ul id="thumbs"> <li><img src="/images/thumb1.png" /></li> <li><img src="/images/thumb2.png" /></li> <li><img src="/images/thumb3.png" /></li> </ul>

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  • Persisting object changes from child form to parent form based on button press.

    - by Shyran
    I have created a form that is used for both adding and editing a custom object. Which mode the form takes is provided by an enum value passed from the calling code. I also pass in an object of the custom type. All of my controls at data bound to the specific properties of the custom object. When the form is in Add mode, this works great as when the controls are updated with data, the underlying object is as well. However, in Edit mode, I keep two variables of the custom object supplied by the calling code, the original, and a temporary one made through deep copying. The controls are then bound to the temporary copy, this makes it easy to discard the changes if the user clicks the Cancel button. What I want to know is how to persist those changes back to the original object if the user clicks the OK button, since there is now a disconnect because of the deep copying. I am trying to avoid implementing a internal property on the Add/Edit form if I can. Below is an example of my code: public AddEditCustomerDialog(Customer customer, DialogMode mode) { InitializeComponent(); InitializeCustomer(customer, mode); } private void InitializeCustomer(Customer customer, DialogMode mode) { this.customer = customer; if (mode == DialogMode.Edit) { this.Text = "Edit Customer"; this.tempCustomer = ObjectCopyHelper.DeepCopy(this.customer); this.customerListBindingSource.DataSource = this.tempCustomer; this.phoneListBindingSource.DataSource = this.tempCustomer.PhoneList; } else { this.customerListBindingSource.DataSource = this.customer; this.phoneListBindingSource.DataSource = this.customer.PhoneList; } }

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  • Calling function from popover.

    - by user288225
    Alright, so I made a popover from my main view and all that good stuff. But I want to have my popover call an action in my main view when a button within the popover is pressed. MainView *mainView = [[MainView alloc] initWithNibName:@"MainView" bundle:nil]; [mainView doStuff]; The "dostuff" function changes some elements within the view. For example, the color of the toolbar is supposed to be changed. I've put a print command and the print command executes. But for some reason, the toolbar won't change color. I've imported the header of MainView into the popover. I did an @class thingy for MainView in my popover. doStuff is declared in MainView's header. The IBOutlets are declared too, and connected. Any ideas?

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  • Twisted: why is it that passing a deferred callback to a deferred thread makes the thread blocking a

    - by surtyaarthoughts
    I unsuccessfully tried using txredis (the non blocking twisted api for redis) for a persisting message queue I'm trying to set up with a scrapy project I am working on. I found that although the client was not blocking, it became much slower than it could have been because what should have been one event in the reactor loop was split up into thousands of steps. So instead, I tried making use of redis-py (the regular blocking twisted api) and wrapping the call in a deferred thread. It works great, however I want to perform an inner deferred when I make a call to redis as I would like to set up connection pooling in attempts to speed things up further. Below is my interpretation of some sample code taken from the twisted docs for a deferred thread to illustrate my use case: #!/usr/bin/env python from twisted.internet import reactor,threads from twisted.internet.task import LoopingCall import time def main_loop(): print 'doing stuff in main loop.. do not block me!' def aBlockingRedisCall(): print 'doing lookup... this may take a while' time.sleep(10) return 'results from redis' def result(res): print res def main(): lc = LoopingCall(main_loop) lc.start(2) d = threads.deferToThread(aBlockingRedisCall) d.addCallback(result) reactor.run() if __name__=='__main__': main() And here is my alteration for connection pooling that makes the code in the deferred thread blocking : #!/usr/bin/env python from twisted.internet import reactor,defer from twisted.internet.task import LoopingCall import time def main_loop(): print 'doing stuff in main loop.. do not block me!' def aBlockingRedisCall(x): if x<5: #all connections are busy, try later print '%s is less than 5, get a redis client later' % x x+=1 d = defer.Deferred() d.addCallback(aBlockingRedisCall) reactor.callLater(1.0,d.callback,x) return d else: print 'got a redis client; doing lookup.. this may take a while' time.sleep(10) # this is now blocking.. any ideas? d = defer.Deferred() d.addCallback(gotFinalResult) d.callback(x) return d def gotFinalResult(x): return 'final result is %s' % x def result(res): print res def aBlockingMethod(): print 'going to sleep...' time.sleep(10) print 'woke up' def main(): lc = LoopingCall(main_loop) lc.start(2) d = defer.Deferred() d.addCallback(aBlockingRedisCall) d.addCallback(result) reactor.callInThread(d.callback, 1) reactor.run() if __name__=='__main__': main() So my question is, does anyone know why my alteration causes the deferred thread to be blocking and/or can anyone suggest a better solution?

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