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  • Error message when compiling while-loop expected identifier

    - by Michael Amici
    When trying to compile an infinite while loop in xcode iphone view based application, it gives me an error that reads expected identifier or '(' before 'while'. I made it as simple as possible. #import "Lockerz_NotifierViewController.h" @implementation Lockerz_NotifierViewController while (1=1) { NSLog(@"Hello? PLEASE HELP ME!!!!!!!!!!"); }

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  • Is it possible to generate a XSL-FO template from a PDF?

    - by Vihung
    Given a PDF document, is it possible to generate a XSL-FO (FOP) template? Obviously, this would be a one-time thing - the generated template would just be a starting point for creating a proper template that pulls in the appropriate data. For me, the ideal tool for doing so would be a Java-based one and should be executable from the command line or through an ANT task. Failing that, it would be something that runs on Linux and MacOS X.

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  • Security review of an authenticated Diffie Hellman variant

    - by mtraut
    EDIT I'm still hoping for some advice on this, i tried to clarify my intentions... When i came upon device pairing in my mobile communication framework i studied a lot of papers on this topic and and also got some input from previous questions here. But, i didn't find a ready to implement protocol solution - so i invented a derivate and as i'm no crypto geek i'm not sure about the security caveats of the final solution: The main questions are Is SHA256 sufficient as a commit function? Is the addition of the shared secret as an authentication info in the commit string safe? What is the overall security of the 1024 bit group DH I assume at most 2^-24 bit probability of succesful MITM attack (because of 24 bit challenge). Is this plausible? What may be the most promising attack (besides ripping the device out off my numb, cold hands) This is the algorithm sketch For first time pairing, a solution proposed in "Key agreement in peer-to-peer wireless networks" (DH-SC) is implemented. I based it on a commitment derived from: A fix "UUID" for the communicating entity/role (128 bit, sent at protocol start, before commitment) The public DH key (192 bit private key, based on the 1024 bit Oakley group) A 24 bit random challenge Commit is computed using SHA256 c = sha256( UUID || DH pub || Chall) Both parties exchange this commitment, open and transfer the plain content of the above values. The 24 bit random is displayed to the user for manual authentication DH session key (128 bytes, see above) is computed When the user opts for persistent pairing, the session key is stored with the remote UUID as a shared secret Next time devices connect, commit is computed by additionally hashing the previous DH session key before the random challenge. For sure it is not transfered when opening. c = sha256( UUID || DH pub || DH sess || Chall) Now the user is not bothered authenticating when the local party can derive the same commitment using his own, stored previous DH session key. After succesful connection the new DH session key becomes the new shared secret. As this does not exactly fit the protocols i found so far (and as such their security proofs), i'd be very interested to get an opinion from some more crypto enabled guys here. BTW. i did read about the "EKE" protocol, but i'm not sure what the extra security level is.

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  • Can a System Analyst come outside of programming?

    - by WeNeedAnswers
    Back in the day, if you wanted to be a Systems Analyst you had to work up the ranks from humble programmer. But these days there are University Courses/Programmes based on this topic alone. Is it thus valid for a graduate or post graduate to come into the world and just do systems analyst without doing the graft of being a programmer first, getting to know the nuances of what code is all about.

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  • Looking for jquery/javascript image rotator controlled by XML file

    - by Carl
    I'm trying to find something like this: http://coffeescripter.com/code/ad-gallery/ that is controlled by an xml file that can simply contain the image location, thumbnail location and the text for title/description. Has to be pure jquery or javascript though - no flash based stuff. I've found loads of great components but can't find one that is controlled by XML. Anyone happen to have seen one around anywhere please?

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  • Using Nuxeo, how do I lock down a page so that it redirects to the login page if the user is unauthe

    - by Aaron Chambers
    I have been put on to a project using Nuxeo, late in it's lifecycle and need to change a few things before it goes live. I am having trouble finding out where I need to look to lock down a Nuxeo based application so that a user is redirected to the login page if they are unauthorised and access a restricted page. Can someone please shoot my some direction on where this sort of logic is kept or defined?

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  • Loading datasets from datastore and merge into single dictionary. Resource problem.

    - by fredrik
    Hi, I have a productdatabase that contains products, parts and labels for each part based on langcodes. The problem I'm having and haven't got around is a huge amount of resource used to get the different datasets and merging them into a dict to suit my needs. The products in the database are based on a number of parts that is of a certain type (ie. color, size). And each part has a label for each language. I created 4 different models for this. Products, ProductParts, ProductPartTypes and ProductPartLabels. I've narrowed it down to about 10 lines of code that seams to generate the problem. As of currently I have 3 Products, 3 Types, 3 parts for each type, and 2 languages. And the request takes a wooping 5500ms to generate. for product in productData: productDict = {} typeDict = {} productDict['productName'] = product.name cache_key = 'productparts_%s' % (slugify(product.key())) partData = memcache.get(cache_key) if not partData: for type in typeData: typeDict[type.typeId] = { 'default' : '', 'optional' : [] } ## Start of problem lines ## for defaultPart in product.defaultPartsData: for label in labelsForLangCode: if label.key() in defaultPart.partLabelList: typeDict[defaultPart.type.typeId]['default'] = label.partLangLabel for optionalPart in product.optionalPartsData: for label in labelsForLangCode: if label.key() in optionalPart.partLabelList: typeDict[optionalPart.type.typeId]['optional'].append(label.partLangLabel) ## end problem lines ## memcache.add(cache_key, typeDict, 500) partData = memcache.get(cache_key) productDict['parts'] = partData productList.append(productDict) I guess the problem lies in the number of for loops is too many and have to iterate over the same data over and over again. labelForLangCode get all labels from ProductPartLabels that match the current langCode. All parts for a product is stored in a db.ListProperty(db.key). The same goes for all labels for a part. The reason I need the some what complex dict is that I want to display all data for a product with it's default parts and show a selector for the optional one. The defaultPartsData and optionaPartsData are properties in the Product Model that looks like this: @property def defaultPartsData(self): return ProductParts.gql('WHERE __key__ IN :key', key = self.defaultParts) @property def optionalPartsData(self): return ProductParts.gql('WHERE __key__ IN :key', key = self.optionalParts) When the completed dict is in the memcache it works smoothly, but isn't the memcache reset if the application goes in to hibernation? Also I would like to show the page for first time user(memcache empty) with out the enormous delay. Also as I said above, this is only a small amount of parts/product. What will the result be when it's 30 products with 100 parts. Is one solution to create a scheduled task to cache it in the memcache every hour? It this efficient? I know this is alot to take in, but I'm stuck. I've been at this for about 12 hours straight. And can't figure out a solution. ..fredrik

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  • How to Get GPS location from the web browser

    - by Ganesh
    Hi every one, I am developing a mobile based web-site, there i have intigrated google maps, i need to fill the 'From' field of google maps dynamically. Is it possible to get the 'GPS' location form web-browser and fill it up in the 'From' field of a google map dynamically.

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  • SQL time issue - need it 6 hours forward!

    - by Luke
    My server is currently based on us eastern time, and as I am in the UK, i need to move this forward 6 hours. When using now() in mysql, i am getting the wrong time, is there anything i can add to now() to bring it forward 6 hours? Thanks

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  • Some menu customisation in Silverstripe

    - by alienv
    1) i need set different class name for every menu item, based on a menu row (iterating, i need just a number) <% control Menu(1) %> <div class="mainmenu-item-$MenuItemRow"><a href="$Link">$MenuTitle</a></div> <% end_control %> 2) is there a simple way to create an small second menu ?

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  • Change and Maintain CSS Style of Button State

    - by TDDG
    I have 5 list items that act like tabs for a page stored in a Masterpage in a asp.net application. When the user selects a list item, I would like to redirect the the page, and change the class for that list item (tab) to show the active tab the user is on. What is the best way to dynamically change the class of the list item based on the user interaction with them, and maintain the state?

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  • Flex - How to edit a xml file on the server

    - by BS_C3
    Hi! I was wondering if it was possible to edit an xml on the server side from a web based flex application. When you use XML files in a Flex application and then compile it to upload it in the server, Flex Buidler generates a swf file with the xml data embedded. How should I do to have access to those XML files?? Thanks for your answers. Regards. BS_C3

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  • Creating JMS Queues at runtime.

    - by ankur
    I am working on an application where the app user can create / delete queues . Also , he would be able to move a message from 1 queue to another, delete a message , rearrange the messages in the queue based on some filter. One possible design is to use activemq for queues and apache camel for various other operations having integrated with Grails. But I am not sure whether ActiveMQ allows creation /deleltion queues at runtime. Would this be a good choice to implement such system?

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  • NUNIT + VS2010 = Unable to copy file from /obj to /bin...being used by another process

    - by TimDog
    I am trying to run some unit tests using NUnit while I have the project open, and VS 2010 cannot rebuild the project while the assembly is loaded in NUnit. I have looked around and haven't found any solutions that seen to fix it. I can close NUnit, then the project builds fine. This is a the same solution based on Rob Conery's BDD demo found here: http://tekpub.com/view/concepts/5 Any thoughts?

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  • PHP 6 not backward compatible

    - by netrox
    From what I read, PHP 6 will break a lot of php scripts. I understand the reasons why it may break but why don't they just keep the PHP 5 and simply call PHP 6 as a different language based on PHP syntax? Like for example, why not just call php 6 scripts with an extension, "p6"- why are they trying so hard to make it backward compatible for old scripts when the extension can be used to call a specific interpreter?

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  • Why is this statement treated as a string instead of its result?

    - by reve_etrange
    I am trying to perform some composition-based filtering on a large collection of strings (protein sequences). I wrote a group of three subroutines in order to take care of it, but I'm running into trouble in two ways - one minor, one major. The minor trouble is that when I use List::MoreUtils 'pairwise' I get warnings about using $a and $b only once and them being uninitialized. But I believe I'm calling this method properly (based on CPAN's entry for it and some examples from the web). The major trouble is an error "Can't use string ("17/32") as HASH ref while "strict refs" in use..." It seems like this can only happen if the foreach loop in &comp is giving the hash values as a string instead of evaluating the division operation. I'm sure I've made a rookie mistake, but can't find the answer on the web. The first time I even looked at perl code was last Wednesday... use List::Util; use List::MoreUtils; my @alphabet = ( 'A', 'R', 'N', 'D', 'C', 'Q', 'E', 'G', 'H', 'I', 'L', 'K', 'M', 'F', 'P', 'S', 'T', 'W', 'Y', 'V' ); my $gapchr = '-'; # Takes a sequence and returns letter = occurrence count pairs as hash. sub getcounts { my %counts = (); foreach my $chr (@alphabet) { $counts{$chr} = ( $[0] =~ tr/$chr/$chr/ ); } $counts{'gap'} = ( $[0] =~ tr/$gapchr/$gapchr/ ); return %counts; } # Takes a sequence and returns letter = fractional composition pairs as a hash. sub comp { my %comp = getcounts( $[0] ); foreach my $chr (@alphabet) { $comp{$chr} = $comp{$chr} / ( length( $[0] ) - $comp{'gap'} ); } return %comp; } # Takes two sequences and returns a measure of the composition difference between them, as a scalar. # Originally all on one line but it was unreadable. sub dcomp { my @dcomp = pairwise { $a - $b } @{ values( %{ comp( $[0] ) } ) }, @{ values( %{ comp( $[1] ) } ) }; @dcomp = apply { $_ ** 2 } @dcomp; my $dcomp = sqrt( sum( 0, @dcomp ) ) / 20; return $dcomp; } Much appreciation for any answers or advice!

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