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• Makefile automatic link dependency ?

  - by Kuang Chen

  It's easy to let program figure out the dependency at compile time, (with gcc -MM). Nevertheless, link dependency (deciding which libraries should be linked to) seems to be difficult to figure out. This issue become emergent when multiple targets with individual libraries to link to are needed. For instance, three dynamic library targets t1.so, t2.so and t3.so needs to be built. t1.so needs math library (-lm), while t2 and t3 don't. It would be tedious to write separate rules. A single rule requiring the three targets linked with math library saves the trouble. However, it causes inflation of target size since math library is unused for t2.so and t3.so. Any ideas?

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• How to work around a site forbidding me to scrape their images with PHP

  - by Petruza

  I'm scraping a site, searching for JPGs to download. Scraping the site's HTML pages works fine. But when I try getting the JPGs with CURL, copy(), fopen(), etc., I get a 403 forbiden status. I know that's because the site owners don't want their images scraped, so I understand a good answer would be just don't do it, because they don't want you to. Ok, but let's say it's ok and I try to work around this, how could this be achieved? If I get the same URL with a browser, I can open the image perfectly, it's not that my IP is banned or anything, and I'm testing the scraper one file at a time, so it's not blocking me because I make too many requests too often. From my understanding, it could be that either the site is checking for some cookies that confirm that I'm using a browser and browsing their site before I download a JPG. Or that maybe PHP is using some user agent for the requests that the server can detect and filter out. Anyway, have any idea?

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• Why does Perl allow mutual "use" relationships between modules?

  - by Haiyuan Zhang

  Let's say there are two modules that mutually use each other: package a; use b; sub p {} 1; package b; use a; 1; I think that it is systematically wrong to write code like the above, because the two modules will endlessly copy each other's code to themselves, but I can successfully run the following code, which makes me very surprised. Could any of you explain all of this to me? #! /usr/bin/perl use a; a->p();

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• Free icons for mobile applications. Where?

  - by Geltrude

  I know that in the sdk folders I can find some (not very well grouped, imho) icon. But, there is a site online specialized that let you download free icons useful for mobile app? Ie world flags, up, down... save, revert..., next..., play, stop..., etc. It would be more appriciated also if you can find these sets in many different colors, and in 2 or 3 sizes (32x32, 64x64, etc.). Have a nice day (ot. Especially my mom - her 62 birthday :-) Edit: those are all good sites, but to green-check the answer I need a small set with the common icons (I think moreabout 50-70 icons), in many different colors and in 2 or 3 different sizes (for lo-mid-hi definition devices). - If a so done site exists for free :-)

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• C/C++: Scanning a TIFF file using LIBTIFF

  - by Matt07

  My problem is to scan a tiff image in C and get all the pixel value (let's say for saving them in a txt file) in C/C++. I scanned the web and i found a library named "TIFFLIB" that should do what i was looking for. I downloaded it using the ubuntu package manager, but the gcc doesn't recognize the library. How do i link the library to the compiler? Have I installed it correctly? Is there any better/easier way to do that?

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• Velocity sort XML file with dynamic-elements

  - by shr_deadman

  Let's say I have a XML file wich looks like this: <root> <dynamic-element name='name' type='text' repeatable='true'> <dynamic-element name='prename' type='text' repeatable='false'> </dynamic element> </dynamic-element> </root> In Liferay the XML file will be filled with input. At the and I will have multiple $name-elements. The question is how I can sort the elements before I print them out with #foreach ($name in $name.getSiblings()) $name.prename.getData() $name.getData() #end thanks, Matthew

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• Linq to Sql query reuse

  - by UserControl

  Let's say we have a view V1 and V2 that is declared like: create view V2 as select V1.*, V2.C1, V2.C2, V2.C3 from V1 join V2 on V1.Key = V2.Key where bla-bla So V2 narrows down the result set of V1 and adds some joins. And there is a retrieval routine in C# IEnumerable<V1> GetData(MyFilter filter, MySortOrder order) {} I want to reuse with V2. Is it possible without performing joins in L2S rather than in database? Should i manually create a base class in the database context or something?

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• Drupal Webform textfield dynamic growing list

  - by Bob Crowley

  Just curious... I have a project where people can input their cooking recipes. I would like to build a webform that will have a textfield and when it is filled in a new textfield appears below. A "growing textfield list". Let me try to show it here: Ingredient #1 _________________________________ [add] When you type and ingredient click "add" you then are going to see: Ingredient #1 Potatoes_________________________ Ingredient #2 _________________________________ [add] Sorry for not knowing the proper markup. However if anyone knows: a) the proper term for this ( I call a growing textfield list )? b) how to do it with webform in drupal?

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• Drupal removing javascript from Full HTML link

  - by Jen

  I am new to Drupal and am trying to create a node (let's call it child) that will only really be accessed when clicked on from another node (we'll call it parent). When closing the child window, I want to parent window to refresh. Outside of Drupal, that's easy: <a onclick="window.close(); window.opener.location.reload();" href="#">Click to close this window</a> However, when I type this into the body of a node using Full HTML, it still strips the onclick text from my post. How can I include javascript in the body of a node like this? Is there a special module I need. Thanks!

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• Authenticating a user for a single app with multiple domains

  - by hofnarwillie

  I have one asp.net web application, but two different domains point to this web app. For instance: www.one.com and www.two.com both point to the same web app. I have an issue where I need certain pages to be on a specific domain (due to some security requirements from our online payment provider - a third party website). So let's say page1.aspx needs to be called on www.two.com The process is as follows: A user logs into www.one.com The authentication cookie is saved to the browser The user then navigates to page1.aspx and, if on the wrong domain, gets redirected to the correct domain. (this redirection happens on page1.aspx in the page_load event) Then asp.net redirects the user to the login screen, because the authentication cookie is not sent to www.two.com. How can I track the user and keep him/her logged in between the two domains?

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• Validation of viewstate MAC failed in Safari

  - by Midhat

  Hi I have a web app using forms authentication. When I perform the following steps Let the login cookie expire Click on a link that requires a logged in user The user is redirected to the login page Click the browser back button The user is redirected to the login page again Log in using a valid username/password I get this exception Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster. This case appears only in safari (windows and mac). The fundamental difference between safari and other browsers is that when we click the back button in step 4, safari shows the login page again, while the other browsers show the previous page the user was working on. Please help in this regard

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• How can you buffer two online videos alternately while playing one of them?

  - by Rajats1234

  On my website, I want my user to be able to launch video 2 at any point in the middle of video 1 without waiting or refreshing the window. How can I buffer the two videos such that I buffer video 1 enough to let it start playing, and then buffer just enough of video 2 that if the user launches it at any point, he does not have to wait to view its first few seconds, and then I can come back and buffer the rest of video 1? If this is not possible, I could also look at buffering video 1 and 2 in parallel while playing only video 1. Thanks!

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• How to create GUI as inner class with WindowBuilder

  - by Tim Kemp

  I would like to use WindowBuilder in Eclipse to construct Swing GUIs. The JPanels I need to build will be inner classes in a non-GUI wrapper, like so: public class MyWrapper extends MyBaseClass { ... class MyPanel extends JPanel { ... } } So my question is this: can I construct MyPanel using WindowBuilder? If so, how should I set it up? If anyone is interested, the wrapper is an abstract base class which the plug-ins I am developing for my app must extend; deployment concerns mean that it's not really practical to put the GUIs in a separate JAR either so I pretty much have to do it this way. My current workflow, which is awful, is to build the GUI in NetBeans and paste the entire generated class into Eclipse where I connect it up to the methods in my wrapper. I am very hopeful that WindowBuilder will let me work more reliably and efficiently if I can trick it into generating code in MyPanel, not MyWrapper. Thanks

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• Is the "==" operator required to be defined to use std::find

  - by user144182

  Let's say I have: class myClass std::list<myClass> myList where myClass does not define the == operator and only consists of public fields. In both VS2010 and VS2005 the following does not compile: myClass myClassVal = myList.front(); std::find( myList.begin(), myList.end(), myClassVal ) complaining about lack of == operator. I naively assumed it would do a value comparison of the myClass object's public members, but I am almost positive this is not correct. I assume if I define a == operator or perhaps use a functor instead, it will solve the problem. Alternatively, if my list was holding pointers instead of values, the comparison would work. Is this right or should I be doing something else?

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• Trouble using xib files in libraries

  - by flohei

  Hi there, I'm having some trouble working with libraries and included xib files. Let me explain my situation first. I've got a project that's running pretty good. Now I need a part of my project as a library for another customer who want's to use some of the functionality in his app. I've created a library with help of that highly recommended article. My customer should be able to initialize a main view controller like this: LibraryMainViewController *lmvc = [[LibraryMainViewController alloc] initWithNibName:@"LibraryMainViewController.xib" bundle:foo]; That for sure leads to an error when I try to present that view controller modally. I'm not sure what bundle I have to use here. I tried something like [NSBundle bundleForClass:[SomeClassInTheLibrary class]]; but that didn't solve the problem. I would be glad if someone could tell me how to actually use a xib file in that kind of situation. Thanks –f

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• Accessing a file (for writing) from a JBoss Web Service

  - by Andreas Grech

  Let's say I have this structure of my Java Web Application: TheProject -- [Web Pages] -- -- abc.txt -- -- index.jsp -- [Source Packages] -- -- [wservices] -- -- -- WS.java WS.java is my Web Service, which is situated in a wservices package. Now from this service, I need to access the abc.txt file and write to it. These are my urls: http://127.0.0.1:8080/TheProject/WS <- the webservice http://127.0.0.1:8080/TheProject/abc.txt <- the file I want to access To read the file, I tried with getResourceAsStream and I was successful in reading from it. But now I also want to write to this file, and I tried such a method but failed. Is there a way I can get access to the abc.txt file from WS.java and be able to successfully read from and write to it?

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• Using AND/OR mysql commands with FROM_UNIXTIME

  - by scatteredbomb

  Trying to select a query in php/mysql to get "Upcoming Items" in a calendar. We store the dates in the DB as a unix time. Here's what my query looks like right now SELECT * FROM `calendar` WHERE (`eventDate` > '$yesterday') OR (FROM_UNIXTIME(eventDate, '%m') > '$current_month' AND `$yearly` = '1') ORDER BY `eventDate` LIMIT 4 This is giving me an error "Unknown column '' in 'where clause'". I'm sure it has to do with my use of parenthesis (which I've never used before in a query) and the FROM_UNIXTIME command. Can someone help me out and let me know how I've screwed this up? Thanks!

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• Which type of data can be garbage collected when app is in background?

  - by Neoh

  Let's say I start from activity A - activity B. While in activity B I press home to exit. After a long time, gc may be called because other apps take higher priority. My question is, which of the following type of data will be garbage collected (I'm pretty sure static fields can be garbage collected any time but I'm not sure about these): i) fields that are declared final or static final ii) intent and its data that I passed from activity A to activity B iii) onSavedInstanceState when orientation is changed during the app running I ask this because I want to ensure that my app won't crash when I restore activity B from background after a long period.

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• How to validate inclusion of time zone?

  - by LearningRoR

  When I try: validates_inclusion_of :time_zone, :in => TimeZone validates_inclusion_of :time_zone, :in => Time.zone This error appears: "<class:User>": uninitialized constant User::TimeZone (NameError) I'm trying to let users select any time zone of the world but since I'm based in the U.S.A. my select menu is this: <%= f.time_zone_select :time_zone, ActiveSupport::TimeZone.us_zones, {:prompt => "Select Your Time Zone *"}, {:id => "timezone"} %> What's the correct way to do this? Thank you.

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• (When) Does hardware, especially the CPU(s), deliver wrong results?

  - by sub

  What I'm talking about is: Is it possible that under certain circumstances the CPU "buggs" and suddenly responses 1+1=2? In which parts of the computer can that happen (HDD, RAM, Mainboard)? What could be the causes? Bad quality? Overheating? Does that even happen? When yes, how frequently? If everything is okay with the CPU (not a single fault in production, good temperature), can that still happen sometimes? What would be the results of, let's say one to three wrong computations? This is programming related as it would be nice to know if you can even rely on the hardware to return the right results.

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• How to format an email address line (with name) with PHP?

  - by nbr

  I'm trying to generate email messages. The recipient's email address and name are specified by a user. What is the correct way to do this with PHP: $to_header = "To: $name <$email>" # incorrect! I already use a decent method for validating the email addressess (let's not go to that now...), but how do I properly encode $name with eg. QP when needed? For example, if the recipient is called "Foo Bär", I should produce (eg.) something like: To: =?utf-8?Q?Foo_B=C3=A4r?= <[email protected]>

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• Hiding "Print to file" in a Java print dialog

  - by Carl Smotricz

  I'm maintaining this Swing app that has a "print" option. Users need to be kept from interacting in any way with the underlying file system, but the print dialog offers "print to file" as one printer, and that of course allows selecting a directory and file from the file system. Is there a painless way to override/modify the print dialog to hide the "to file" printer from this dialog? I understand the API will let me do this piecemeal but I'd rather not have to re-create most of the dialog GUI and functionality to do this.

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• How can I add floats together in different orders, and always get the same total?

  - by splicer

  Let's say I have three 32-bit floating point values, a, b, and c, such that (a + b) + c != a + (b + c). Is there summation algorithm, perhaps similar to Kahan summation, that guarantees that these values can be summed in any order and always arrive at the exact same (fairly accurate) total? I'm looking for the general case (i.e. not a solution that only deals with 3 numbers). Is arbitrary precision arithmetic the only way to go? I'm dealing with very large data sets, so I'd like to avoid the overhead of using arbitrary precision arithmetic if possible. Thanks!

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• Attach to Property's setter

  - by StupidDeveloper

  I haven't found similiar post so I'm asking this. Let's say I defined somewhere an application wide available static Property (I mean it's not local) and in one class I would like to know when this property is being changed. Apart from aop (transparentproxy etc.) which I think doesn't suit me well here (and I can't add that to project anyway), what are the options here? One solution I can think of, which is probably a very nasty one, is to use some event that would be executed in the setter and just attach it in the class(es) which needs that. Something like: public static event EventHandler CurrentNumberChanged= delegate {}; public static int CurrentNumber { get { return currentNumber; } set { currentNumber = value; CurrentNumberChanged(null, EventArgs.Empty); } } I know it's really unsafe to use such events ( read here ). And since I would use it in asp.net makes it even more ugly. Do you have any advices ?

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• ondevicemotion in Chrome desktop returns true

  - by Martin Klasson

  I am using a "shake" function from github - and it has a detection that is browser-based javascript. //feature detect this.hasDeviceMotion = 'ondevicemotion' in window; This though yields true even on Chrome on OS X. It feels strange, since I am not willing to shake my monitor on my desktop. Safari on OS X gives me "false" in return when testing. I have searched but not been able to find out why Chrome decided to take this path. It bugs me. Is there a better way to make this detection? Not all "mobile devices" has shake as well.. or does not let the browser have that capability, as it does not seem to work in windows phones.

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