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  • How to replicate PS multiply layer mode

    - by Andrew Philpott
    Does anybody know of a good way to replicate Photoshop's multiply layer mode using either an image or CSS? I'm working on a project that has thumbnails that get a color overlay when you hover over them, but the designer used a layer set to multiply and I can't figure out how to produce it on the web. The best thing I've come up with is either using rgba or a transparent png, but even then it doesn't look right.

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  • Mysql count columns

    - by Sergio
    I have a table for image gallery with four columns like: foid | uid | pic1 | pic2 | pic3 | date | ----------------------------------------------- 104 | 5 | 1.jpg | 2.jpg | 3.jpg | 2010-01-01 105 | 14 | 8.jpg | | | 2009-04-08 106 | 48 | x.jpg | y.jpg | | 2010-08-09 Mysql query for the user's galleries looks like: SELECT * FROM foto WHERE uid = $id order by foid DESC The thing that I want to do is count the number of images (PIC1, PIC2, PIC3) in every of the listed galleries. What is the best way for doing that?

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  • c++ class member functions instatiated by traits

    - by Jive Dadson
    I am reluctant to say I can't figure this out, but I can't figure this out. I've googled and searched stackoverflow, and come up empty. The abstract, and possibly overly vague form of the question is, how can I use the traits-pattern to instantiate non-virtual member functions? The question came up while modernizing a set of multivariate function optimizers that I wrote more than 10 years ago. The optimizers all operate by selecting a straight-line path through the parameter space away from the current best point (the "update"), then finding a better point on that line (the "line search"), then testing for the "done" condition, and if not done, iterating. There are different methods for doing the update, the line-search, and conceivably for the done test, and other things. Mix and match. Different update formulae require different state-variable data. For example, the LMQN update requires a vector, and the BFGS update requires a matrix. If evaluating gradients is cheap, the line-search should do so. If not, it should use function evaluations only. Some methods require more accurate line-searches than others. Those are just some examples. The original version instantiates several of the combinations by means of virtual functions. Some traits are selected by setting mode bits that are tested at runtime. Yuck. It would be trivial to define the traits with #define's and the member functions with #ifdef's and macros. But that's so twenty years ago. It bugs me that I cannot figure out a whiz-bang modern way. If there were only one trait that varied, I could use the curiously recurring template pattern. But I see no way to extend that to arbitrary combinations of traits. I tried doing it using boost::enable_if, etc.. The specialized state info was easy. I managed to get the functions done, but only by resorting to non-friend external functions that have the this-pointer as a parameter. I never even figured out how to make the functions friends, much less member functions. The compiler (vc++ 2008) always complained that things didn't match. I would yell, "SFINAE, you moron!" but the moron is probably me. Perhaps tag-dispatch is the key. I haven't gotten very deeply into that. Surely it's possible, right? If so, what is best practice?

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  • Override browser "Find" feature

    - by Trevor Burnham
    I'm wondering whether it's possible to use JavaScript to intercept or prevent the user from using the browser's "Find" feature to find text on the page. (Trust me, I have a good reason!) I'm guessing the answer is "no," beyond the obvious intercepting Cmd/Ctrl+F. A second-best solution would be to intercept the text highlighting that the browser performs during a Find. Is there any way to do this, in any browser?

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  • Memory ReAllocation

    - by davispuh
    What is the right and best way to reallocate memory? for example I allocate 100 bytes with WinAPI function HeapAlloc then I fill 100 bytes of that memory with some data and now I want to add more new data at end of previous... What Should I do? Make a new allocation with more bytes and then copy old+new to new location and free old memory? Or there is some way to allocate new memory at end of old data and then copy only new data?

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  • Progressive download of images in a UITableView

    - by ncohen
    Hi everyone, I'm developing on the iPhone and I have seen in the AppStore that the images are progressively downloaded in the UITableView... How can I implement that? My idea was to detect the showed content (which cells are shown) and download these images. My problem is that I don't know how to detect the showed cells! Is it the good way to do it? Best

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  • Dealing with a shutdown during a file write?

    - by Ken
    All, I'm working on a Real-time system, VxWorks I think, I'm saving application settings to a file. What's the best way to handle preserving the settings if the system shuts down or loses power in the middle of a file write? All I can think of is shuffling a few files around or reducing the frequency at which i Save variables in order to reduce incidents.

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  • Java configuration framework

    - by Steen
    I'm in the process of weeding out all hardcoded values in a java library and was wondering what framework would be the best (in terms of zero- or close-to-zero configuration) to handle run-time configuration? I would prefer xml-based config-files, but it's not essential. Please do only reply if you have practical experience with a framework. I'm not looking for examples, but experience... Thanks for taking the time.

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  • Should Databases be used just for persistence

    - by Raju
    A lot of web applications having a 3 tier architecture are doing all the processing in the app server and use the database for persistence just to have database independence. After paying a huge amount for a database, doing all the processing including batch at the app server and not using the power of the database seems to be a waste. I have a difficulty in convincing people that we need to use best of both worlds.

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  • Which type of design pattern should be used to create an emulator?

    - by Facon
    I have programmed an emulator, but I have some doubts about how to organizate it properly, because, I see that it has some problems about classes connection (CPU <- Machine Board). For example: I/O ports, interruptions, communication between two or more CPU, etc. I need for the emulator to has the best performance and good understanding of the code. PD: Sorry for my bad English. EDITED: Asking for multiple patterns.

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  • How to study design patterns?

    - by Alien01
    I have read around 4-5 books on design patterns, but still I dont feel I have come closer to intermediate level in design patterns? How should I go studying design patterns? Is there any best book for design pattern? I know this will come only with experience but there must be some way to master these?

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  • Using Android Test Framework

    - by Bharat Pawar
    Android provides various packages for testing like AndroidTestCase ApplicationTestCase InstrumentationTestCase ActivityInstrumentationTestCase2 ActivityTestCase I need to know how to decide which package is best suitable for testing my app. Some info is provided in this link http://developer.android.com/reference/android/test/package-summary.html But I need more clarity on this...

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  • Recommended way to develop using Jetty and Eclipse

    - by Ula Krukar
    Hi, I am currently developing a J2EE application and I would like to use Jetty. I would like to have iot integrated with Eclipse, so I could debug the appliaction. I've tried out couple of plugins (including WTP) but nothing works well enough. Run Jetty Run plugin is the best, but I cannot specify context-root in it, which makes it unusable for me. What would you recommend?

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  • Creating an additional related model with Devise

    - by Tim Sullivan
    I've started to implement a new project using Devise, which is pretty fantastic for handling users. However, when a user signs up, they're not just creating a User model, but also need to create a related Account model that represents the company. Additional users will also belongs_to this Account model. I can't seem to find a hook for this in Devise, though it seems like a pretty common pattern. What's the best practice for this?

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  • What would you suggest as a high school first language?

    - by ldigas
    Edit by OA: After reading some answers I'll just update the question a little. At first I put it a little bluntly, but some of those gave me some good arguments which have to be taken into consideration while making a stand on this one. (these are mostly picked up from comments and answers below). A few things to take into account: to many pupils this is a first programming language - at this stage most of them have trouble grasping a difference between data types, variable passing, ... and whatnot, less alone pointers and similar 'low level stuff' :) they will all have to pass this to get into next grade (well, big majority of them anyway) not all of them have computers at home, not all of them are willing to learn this, less alone interested in - so the concepts have to be taught on a finite time scale in school hours (as well as practice on computers) free literature is a bonus - the teacher will make some scripts and handaways, but still ... I wouldn't like to bear the parents with the burden of buying expensive literature (also, english is not a native language here ... and although they are all learning it, their ability to read it fluently is somewhat questionable) somebody gave an argument - "a language which does not get in the way of ideas" - good one accessibility on different platforms in not expecially important at this point - although most of the suggested ones are available on win as well as linux - not many macs in this part of europe (their prices are sky high for anything but specialised usage) I will check what are the licencing issues on ms express editions about using it massively in high schools for purposes like this - if someone has any info about this, please, do not be shy with it :) A friend of mine, informatics teacher - in EU it comes as something as junior cs teacher, in a local high school asked me what I thought about what should be the first language pupils should be taught? It is a technical school (a little more oriented towards mathematics than the gymnasium, but not computer oriented totally). So I'm asking you - what do you think should be the first language pupils are exposed to in highschool? They have been teaching Pascal so far, but she's not sure that's a good course. She thought about switching to C (which I resented; considering not all pupils have interests in programming, to start with, and should be taught something higher level since they are just gripping the idea of a loop and such ... for a start), I suggested python or ruby (preferably py since it handles all paradigms). What is your opinion on this one? I looked, but didn't find a similar question on SO, so if there is one, please just point me towards it. Edit: The assumption is that none of the pupils have been exposed to any programming in junior school. See also: What is the best way to teach young kids some basic programming concepts? Best ways to teach a beginner to program How and when do you teach a kid to code What is the easiest language to start with? High School Programming

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  • Android/Java Append String + int

    - by xger86x
    Hi, i have a question, what is the best way to append ints and Strings to build a new String? In the allocation debug tool i see too much allocations if i use the operator +. But i have tried also with StringBuffer and there are still too much allocations. Anyone can help me? Thanks

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  • Hbase and 1- Many Relation

    - by Shuja
    Hi All I have one question which can be best described by the following scenario. Suppose I have three tables BaseCategory,Category and products. If i am thinking in terms of RDBMS then the relationship amoung these tables are 1- One BaseCategory has Many categories 2- One Category has Many Products. Now i am thinking to convert it into HBase. can anybody help me how to map these relations into HBase?

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  • Transcoding audio and video

    - by Lance Fisher
    What is the best way to transcode audio and video to show on the web? I need to do it programmatically. I'd like to do something like YouTube or Google Video where users can upload whatever format they want, and I encode it to flv, mp3, and/or mp4. I could do it on our server, but I would rather use an EC2 instance or even a web service. We have a Windows 2008 server.

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  • List of objects plus a tag

    - by MC
    I want to store a list of objects, lets say of type Car, but with an additional 'tag' property eg a boolean True/False which does not belong on the Car class. What is the best way to accomplish this? I need to pass the result between methods.

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  • Delete all characters in a multline string upto a given pattern

    - by biffabacon
    Using Python I need to delete all charaters in a multiline string up to the first occurrence of a given pattern. In Perl this can be done using regular expressions with something like: #remove all chars up to first occurrence of cat or dog or rat $pattern = 'cat|dog|rat' $pagetext =~ s/(.*)($pattern)/$2/xms; What's the best way to do it in Python?

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