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• Where can find examples and tutorials for Perl's Net::Pcap module?

  - by dan

  Could someone provide a good documentation / tutorial/ PDFs/ reference to book link about Net::Pcap in addtion to the module documentation and this Perl and Net::Pcap article on PerlMonks?

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• What is the proper way to change the UINavigationController transition effect

  - by Felipe Sabino

  I have seen lots of people asking on how to push/pop UINavigationControllers using other animations besides the default one, like flip or curl. The problem is that either the question/answer was relative old, which means the have some things like [UIView beginAnimations:] (example here) or they use two very different approaches. The first is to use UIView's transitionFromView:toView:duration:options:completion: selector before pushing the controller (with the animation flag set to NO), like the following: UIViewController *ctrl = [[UIViewController alloc] init]; [UIView transitionFromView:self.view toView:ctrl.view duration:1 options:UIViewAnimationOptionTransitionFlipFromTop completion:nil]; [self.navigationController pushViewController:ctrl animated:NO]; Another one is to use CoreAnimation explicitly with a CATransaction like the following: // remember you will have to have the QuartzCore framework added to your project for this approach and also add <QuartzCore/QuartzCore.h> to the class this code is used CATransition* transition = [CATransition animation]; transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn]; transition.duration = 1.0f; transition.type = @"flip"; transition.subtype = @"fromTop"; [self.navigationController.view.layer removeAllAnimations]; [self.navigationController.view.layer addAnimation:transition forKey:kCATransition]; UIViewController *ctrl = [[UIViewController alloc] init]; [self.navigationController pushViewController:ctrl animated:NO]; There are pros and cons for both approaches. The first approach gives me a much cleaner code but restricts me from using animations like "suckEffect", "cube" and others. The second approach feels wrong just by looking at it. It starts by using undocumented transitions types (i.e. not present in the Common transition types documentation from CATransition Class Reference) which might get your app rejected from App Store (I mean might as I could not found any reference of apps being rejected because it was using this transactions, which I would also appreciate any clarification on this matter), but it gives you much more flexibility on your animations, as I can use other animation types such as "cameraIris", "rippleEffect" and so on. Regarding all that, do I really need to appeal for QuartzCore and CoreAnimation whenever I need a fancier UINavigationController transition? Is there any other way to accomplish the same effect using only UIKit? If not, will the use of string values like "flip" and "cube" instead of the pre-defined constants (kCATransitionFade, kCATransitionMoveIn, etc...) be an issue regarding my app approval in the App Store? Also, are there other pros and cons regarding both approaches that could help me deciding whether to choose each one of them?

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• how to pass session variable to model in RoR?

  - by siulamvictor

  I used a global variable in my app for passing information before. But I got a problem and thanks everyone here suggested me to store those data in session with database. I tried, but I found that I can't access the session variable in Model. I googled and knew this is the Model normal behavior, RoR won't pass the session variable to Model. So how to pass the value of the session variable into Models? or is there any other method for my use case? I need a variable storing a value, which is required in all MVCs, and should be independent between different concurrent users. Thanks everyone. :)

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• List<Object> as a JRBeanCollectionDataSource to a Subreport

  - by Kiran

  am passing a List as a JRBeanCollectionDataSource to a Subreport. here Object is of Type A and B. A is having properties 'name' and 'address' and B is having property 'location'. if Object is of type A then i have display 'name' and 'address' in subreport. and if is of type B then i have to diaplay 'location' in subreport. i have to access a type of Object in a subreport, means is of which type (A or B)?. i have tried a lot but not found any solution. can anyone help me please. thanks in advance.

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• Uncaught SyntaxError: Unexpected token var

  - by Bob R

  I have an error Uncaught SyntaxError: Unexpected token var displayed between (1) and (2) its a very odd error and it doesn't make sense at all. if ($hiddenimage.length==0){ //if this is the first time moving over or clicking on the anchor link var $hiddenimage=$('<img src="'+this.href+'" />').appendTo($hiddenimagediv) //populate hidden div with enlarged image $hiddenimage.bind('loadevt', function(e){ //when enlarged image has fully loaded loadarea.empty().append($.thumbnailviewer2.buildimage($, $anchor, s, options) (1) - var $targetimage=$.thumbnailviewer2.buildimage($, $anchor, s, options) //create reference actual enlarged image (2) - $loadarea.empty().append($targetimage) //show enlarged image $.thumbnailviewer2.showimage($targetimage, s) })

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• Hibernate: Difference between session.get and session.load

  - by tomato

  From the API, I could see it has something to do with proxy. But I couldn't find a lot of information on proxy and do not understand the difference between calling session.get and session.load. Could someone please explain or direct me to a reference page? Thank you!!

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• Expression Encoder 3 SDK screen capture C# sample?

  - by George2

  Hello everyone, I am using VSTS 2008 + .Net 3.5 + C# + Microsoft Expression 3 SDK. I want to capture screen and output a wmv file. I tried hard but can not found C# samples from Google. Any reference samples? thanks in advance, George

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• shouldAutorotateToInterfaceOrientation always get called more than once.

  - by lovecactus

  (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation My code get this event more than once while device is rotating. I'm searching in apple docs for reference but seems no lucky. Could any one offer a hint why this is happening? My code is an apple doc sample code, without any change but some logs. http://developer.apple.com/iphone/library/samplecode/AlternateViews/Introduction/Intro.html#//apple_ref/doc/uid/DTS40008755

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• Changing Color with LinearLayout and TextView in Java (Android)

  - by Rob S.

  I'm a relatively new Android developer and I noticed what seems like an oddity to me that I'm hoping someone can explain. I have LinearLayout ll. This line of code fails for me when executed: ll.setBackgroundColor(R.color.white); However this line of code works: ll.setBackgroundResource(R.color.white); I assume its simply because I have white defined in my resources. However, I've also tried passing 0xFFFFFF in setBackgroundColor() and that doesn't work either. Similarly with my TextView text this line of code fails when executed: text.setTextColor(R.color.white); I can see my TextView so I know I initialized it correctly (like my LinearLayout which I can also see). So I guess my question boils down to: How do I properly use LinearLayout.setBackgroundColor() and TextView.setTextColor() ? Thanks a ton in advance. I've read through the docs and tried to find information online via googling and haven't come up with anything.

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• Mapping between Excel and XML file - How to refresh from C#

  - by osteinme

  Hi Got an excel spread sheet where I specify mapping to an XML file. I'd like to open the spread sheet from C# and force refresh the cells mappped to the XML file. - How can I do that ? Any dll I need to reference ? Thanks Olivier

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• jQuery: how to pick unique IDs ?

  - by Seerumi

  Hello. New to whole this jQuery (and javascript altogether, heh) and so far it's been excellent, but now I'm in a small pickle. Let's say I have list of forms generated from SQL database and every single one of them has to have unique id, so how I can select the specific item that is to be manipulated (changing values via php). the $("#submit").click(function()) will trigger every submit buttons on the page, so how I can the #submit to be some random id that I clicked. There might be a smarter way, but I'm new to this so try to bear with me. thought of passing the unique value with onClick="myfunction(unique_id)", but don't know how it goes with jQuery. hope this made any sense

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• Pass temporary object to function that takes pointer

  - by Happy Mittal

  I tried following code : #include<iostream> #include<string> using namespace std; string f1(string s) { return s="f1 called"; } void f2(string *s) { cout<<*s<<endl; } int main() { string str; f2(&f1(str)); } But this code doesn't compile. What I think is : f1 returns by value so it creates temporary, of which I am taking address and passing to f2. Now Please explain me where I am thinking wrong?

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• C Objects in Objective-C

  - by paul simmons

  Hi, I couldn't find a clear explanation, just asking to be sure; are C data types handled same way (in terms of memory management) in Obj.C? i.e. they are created on stack, released immediately etc.? So they differ from Obj.C objects? Or may we make an analogy with C# (just an analogy not exactly) so that C types are handled as 'value types' and Obj.C objects as 'reference types'?

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• android threads

  - by rantravee

  Hi, I'm searching for some good material on android threads but I couldn't find references for a complete description about this subject. So if you know any valuable reference please point them to me.

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• Is there a way to set up a Linux pipe to non-buffering or line-buffering?

  - by ern0

  My program is controlling an external application on Linux, passing in input commands via a pipe to the external applications stdin, and reading output result via a pipe from the external applications stdout. The problem is that writes to pipes are buffered by block, and not by line, and therefore delays occur before my app receives data output by the external application. The external application cannot be altered to add explicit fflush() calls. When I set the external application to /bin/cat -n (it echoes back the input, with line numbers added), it works correctly, it seems, cat flushes after each line. The only way to force the external application to flush, is sending exit command to it; as it receives the command, it flushes, and all the answers appears on the stdout, just before exiting. I'm pretty sure, that Unix pipes are appropiate solution for that kind of interprocess communication (pseudo server-client), but maybe I'm wrong. (I've just copied some text from a similar question: Force another program's standard output to be unbuffered using Python)

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• why can't I call .update on a MessageDigest instance

  - by Arthur Ulfeldt

  when i run this from the repl: (def md (MessageDigest/getInstance "SHA-1")) (. md update (into-array [(byte 1) (byte 2) (byte 3)])) I get: No matching method found: update for class java.security.MessageDigest$Delegate the Java 6 docs for MessageDigest show: update(byte[] input) Updates the digest using the specified array of bytes. and the class of (class (into-array [(byte 1) (byte 2) (byte 3)])) is [Ljava.lang.Byte; Am I missing something in the definition of update? Not creating the class I think I am? Not passing it the type I think I am?

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• Flash 10 - read file from a drag and drop action?

  - by user246114

  Hi, I'm looking at how to read a file in flash 10 here: http://www.thedesilva.com/2008/11/flash-10-file-reference/ is there a way to initiate the file read from a drag and drop? For example, the user drags and drops a text file onto my flash element in the browser - can I initiate the file read from that? Thanks

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• How do i get ServletContext object in a simple class file?

  - by Nitesh Panchal

  Hello, I am creating a simple web application. I need to get reference to ServletContext object in that class. How can i get it?

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• how can refer a system dll's instead of system32 to application path?

  - by Rajakumar

  hi to all, I want to change the reference of system dlls ,into my local application dir? Is it possible ,if change system32.dlls name ,which is present in application exe(imported table )?...pls help me regarding this ....Thanks.

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• Maximal Length of List to Shuffle with Python random.shuffle?

  - by Henrik

  I have a list which I shuffle with the Python built in shuffle function (random.shuffle) However, the Python reference states: Note that for even rather small len(x), the total number of permutations of x is larger than the period of most random number generators; this implies that most permutations of a long sequence can never be generated. Now, I wonder what this "rather small len(x)" means. 100, 1000, 10000,... Can anybody clarify? Thanks!

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• Escaping and unescaping a string with single and double quotes in Javascript

  - by Reina

  I have a search box that a user can search for any string including single AND double quotes, once they have searched, the backend is passing the keyword back to me so I can put it back in the box. I don't know what the string is so I can't escape quotes myself, below is an example: var keyword = "hello"; $("#selectionkeywords").val(); The issue I am having is that if the user enters "hello" the keyword becomes ""hello"" and I get this error: missing ) after argument list [Break On This Error] jQuery("#selectionkeywords").val(""hello""); The user could also enter single quotes so that rules it out as well. I tried using escape unescape but I still have the same issue e.g. escape(""hello"") I could get the value in an unescaped format e.g. "hello" but I don't know what to do with it, escape doesn't work on it I end up with this %26%23034%3Bhello%26%23034%3B So I'm pretty much stuck at the moment as I can't do anything to the string, any ideas?

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• how should i load a bitmap for an android game?

  - by Heysus Escobar

  i been working on a game with no bitmaps or anything, I'm using rectangles as objects and changing their color for their purpose like a red rectangles for player and gray rectangles for walls. My question is what is the right way to replace the rectangles with bitmaps/images? I know to load Bitmaps you can just do this : Bitmap randomBitmap = BitmapFactory.decodeResource(getResources(), com.example.android4gametest.R.drawable.ic_launcher); Should i load all my Bitmaps and pass them to their Classes or should i load the bitmap inside their class instead of passing it ? and how would i do that because i cannot use the BitmapFactory because i have no access to the getResources()! or should i load my bitmaps/images from my assets folder which i know i wont have the same "tools" you can say to mess with the bitmap.

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• using full domains in a multi-site application set up

  - by mike in africa

  hi, i'm building a multi-site application where a client must be able to use his own domain (as oppose to just a subdomain). i like to know the different ways to go about it, and what configuration is needed on both end when/if the client wishes to handle email hosting externally. any reference to lxadmin/hypervm would be helpful too. tx~ edit: i'm running apache; no ssl requirement.

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• Displaying single digit on a LCD using ARM microcontroller?

  - by Alex Xander

  I am writing an embedded application in which I need to display a digit on LCD. There must be some pre-existing libraries available doing the same. Or is there some reference code in C-language that could be referred? Microcontroller is ARM based LPC2378.

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• trying to prune down a list of files

  - by romunov

  I have a list of files and I'm trying to extract all layer1_*.grd files. Is there a way of doing this in one grep expression? lof <- c("layer1_1.grd", "layer1_1.gri", "layer1_2.grd", "layer1_2.gri", "layer1_3.grd", "layer1_3.gri", "layer1_4.grd", "layer1_4.gri", "layer1_5.grd", "layer1_5.gri", "layer2_1.grd", "layer2_1.gri", "layer2_2.grd", "layer2_2.gri", "layer2_3.grd", "layer2_3.gri", "layer2_4.grd", "layer2_4.gri", "layer2_5.grd", "layer2_5.gri", "layer3_1.grd", "layer3_1.gri", "layer3_2.grd", "layer3_2.gri", "layer3_3.grd", "layer3_3.gri", "layer3_4.grd", "layer3_4.gri", "layer3_5.grd", "layer3_5.gri", "layer4_1.grd", "layer4_1.gri", "layer4_2.grd", "layer4_2.gri", "layer4_3.grd", "layer4_3.gri", "layer4_4.grd", "layer4_4.gri", "layer4_5.grd", "layer4_5.gri" I tried doing this in two steps: list.of.files <- list.files(pattern = c("1_")) list.of.files <- list.of.files[grep(".grd", list.of.files)] Can someone enlighten me how to do this with grep in one step? I naively tried passing list() and c() to the grep but, as you can imagine, it doesn't work. list.of.files <- list.files() list.of.files <- list.of.files[grep(list("1_", ".grd"), list.of.files)]

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