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  • absolutely positioned divs that don't move when page is scrolled...

    - by Kyle
    I've done this in the past using a method similar to this: http://javascriptkit.com/javatutors/static3.shtml but I don't like the "flicker" effect as the page is scrolled and the div needs to move with the scrolling. Lately I've seen a lot of site that have an element (a div or the like I presume) that don't move when the page is scrolled but it's seemless...they're just there and it's a beautiful thing. Unfortunately I can't seem to recall where I've seen it lately to view the source and try to figure it out so I figured I'd turn here and see what all of you experts can provide as far as assistance / suggestions. TIA

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  • What db fits me?

    - by afvasd
    Dear Everyone I am currently using mysql. I am finding that my schema is getting incredibly complicated. I seek to find a new db that will suit my needs: Let's assume I am building a news aggregrator (which collects news from multiple website). I then run algorithms to determine if two news from different sites are actually referring to the same topic. I run this algorithm to cluster news together. The relationship is depicted below: cluster \--news1 \--word1 \--word2 \--news2 \--word3 \--news3 \--word1 \--word3 And then I will apply some magic and determine the importance of each word. Summing all the importance of each word gives me the importance of a news article. Summing the importance of each news article gives me the importance of a cluster. Note that above cluster there are also subgroups( like split by region etc), and categories (like sports, etc) which I have to determine the importance of that in a particular day per se. I have used views in the past to do so, but I realized that views are very slow. So i will normally do an insert into an actual table and index them for better performance. As you can see this leads to multiple tables derived like (cluster, importance), (news, importance), (words, importance) etc which can get pretty messy. Also the "importance" metric will change. It has become increasingly difficult to alter tables, update data (which I am using TRUNCATE TABLE) and then inserting from null. I am currently looking into something schemaless like Mongodb. I do not need distributedness. I would very much want something that is reasonably fast (which can be indexed) and something that is a lot more flexible that traditional RDMBS. Also, I need something that has some kind of ORM because I personally like ORM a lot. I am currently using sqlalchemy Please help!

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  • Examples of 2D side-scrollers that achieve open non-linear feel?

    - by Milosz Falinski
    I'm working on a 2.5D platformer prototype that aims for an open feel while maintaining familiar core mechanics. Now, there's some obvious challenges with creating a non constricted feel in a spatially constricted environment. What I'm interested in, is examples of how game designers deal with the "here's a level, beat the bad guys/puzzles to get to the next level" design that seems so natural to most platformers (eg. Mario/Braid/Pid/Meat Boy to name a few). Some ideas for achieving openness I've come across include: One obvious successful example is Terraria, which achieves openness simply through complexity and flexibility of the game-system Another example that comes to mind is Cave Story. Game is non-linear, offers multiple choices and side-stories Mario, Rayman and some other 'classics' with a top-down level selection. I actually really dislike this as it never did anything for me emotionally and just seems like a bit of a lazy way to do things. Note: I've not actually had much experience with most of the 'classical' console platformers, apart from the obvious Marios/Zeldas/Metroids, since I've grown up on adventure games. By that I mean, it's entirely possible that I simply missed some games that solve the problem really well and are by some considered obvious 'classics'.

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  • Can JSON be made easily and safely editable by the non-technical Excel crowd?

    - by glitch
    I'm looking for a data storage format that's very intuitive and easy to edit. It should be ideally targeted towards the same crowd as Excel. At the same time I would like the data structure to be a tree. Ideally this would be JSON, since it offers both the tree aspect and allows for more interesting constructs like arrays. That and parsing libraries for JSON are ubiquitous, so I don't have to reinvent the wheel. The problem is that, at least with a non-specialized text editor, JSON is a giant pain to edit for a non-technical user. I'm thinking along the lines of someone who might have used Excel in the past, but never a real text editor. Someone who might not be comfortable with the idea of preserving JSON syntax by hand. Are there data formats out there that would fit this profile? I'd very much prefer this to be a JSON actually, but then it would require a solid editing tool that would hide the underlying implementation from the user. Think Excel and how it abstracts CSV syntax from the user. The reason I'm looking for something like this is because the team has been working with pretty hierarchical data for a while now and we've hit the limits of how easy it is to represent in simple CSVs without having to create complex rules for how represent hierarchy semantics from each row. Any suggestions?

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  • Are small amounts of functional programming understandable by non-FP people?

    - by kd35a
    Case: I'm working at a company, writing an application in Python that is handling a lot of data in arrays. I'm the only developer of this program at the moment, but it will probably be used/modified/extended in the future (1-3 years) by some other programmer, at this moment unknown to me. I will probably not be there directly to help then, but maybe give some support via email if I have time for it. So, as a developer who has learned functional programming (Haskell), I tend to solve, for example, filtering like this: filtered = filter(lambda item: included(item.time, dur), measures) The rest of the code is OO, it's just some small cases where I want to solve it like this, because it is much simpler and more beautiful according to me. Question: Is it OK today to write code like this? How does a developer that hasn't written/learned FP react to code like this? Is it readable? Modifiable? Should I write documentation like explaining to a child what the line does? # Filter out the items from measures for which included(item.time, dur) != True I have asked my boss, and he just says "FP is black magic, but if it works and is the most efficient solution, then it's OK to use it." What is your opinion on this? As a non-FP programmer, how do you react to the code? Is the code "googable" so you can understand what it does? I would love feedback on this :) Edit: I marked phant0m's post as answer, because he gives good advice on how to write the code in a more readable way, and still keep the advantages. But I would also like to recommend superM's post because of his viewpoint as a non-FP programmer.

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  • How can I solve the apache2 httpd error "mixing * ports and non-* ports with a NameVirtualHost addre

    - by rrc7cz
    Here is the error I get when booting up Apache2: * Starting web server apache2 apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1 for ServerName [Wed Oct 21 16:37:26 2009] [error] VirtualHost *:80 -- mixing * ports and non-* ports with a NameVirtualHost address is not supported, proceeding with undefined results [Wed Oct 21 16:37:26 2009] [error] VirtualHost *:80 -- mixing * ports and non-* ports with a NameVirtualHost address is not supported, proceeding with undefined results [Wed Oct 21 16:37:26 2009] [error] VirtualHost *:80 -- mixing * ports and non-* ports with a NameVirtualHost address is not supported, proceeding with undefined results [Wed Oct 21 16:37:26 2009] [error] VirtualHost *:80 -- mixing * ports and non-* ports with a NameVirtualHost address is not supported, proceeding with undefined results [Wed Oct 21 16:37:26 2009] [warn] NameVirtualHost *:80 has no VirtualHosts I first followed this guide on setting up Apache to host multiple sites: http://www.debian-administration.org/articles/412 I then found a similar question on ServerFault and tried applying the solution, but it didn't help. Here is an example of my final VirtualHost config: <VirtualHost *:80> ServerAdmin [email protected] ServerName www.xxx.com ServerAlias xxx.com # Indexes + Directory Root. DirectoryIndex index.html DocumentRoot /var/www/www.xxx.com # Logfiles ErrorLog /var/www/www.xxx.com/logs/error.log CustomLog /var/www/www.xxx.com/logs/access.log combined </VirtualHost> with the domain X'd out to protect the innocent :-) Also, I have the conf.d/virtual.conf file mentioned in the guide looking like this: NameVirtualHost * The odd thing is that everything appears to work fine for two of the three sites.

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  • Faut-il faire des études supérieures pour être un bon développeur ? Non, d'après les fondateurs de 37signals

    Faut-il faire des études supérieures pour être un bon développeur ? Non d'après les fondateurs de 37signals « Oubliez la formation conventionnelle », peut-on lire en grand titre sur le best-seller « Rework », écrit par Jason Fried et David H. Hanson. Dans ce chapitre d'un livre atypique qui inspire depuis sa sortie de nombreux entrepreneurs et start-ups, les deux fondateurs de 37signals se moquent ouvertement les recruteurs qui exigent aux prétendants à leurs postes des diplômes uni...

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  • How do you explain refactoring to a non-technical person?

    - by Benjol
    (This question was inspired by the most-voted answer here) How do you go about explaining refactoring (and technical debt) to a non-technical person (typically a PHB or customer)? ("What, it's going to cost me a month of your work with no visible difference?!") UPDATE Thanks for all the answers so far, I think this list will provide several useful analogies to which we can point the appropriate people (though editing out references to PHBs may be wise!)

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  • Are non Turing-complete languages considered programming languages at all?

    - by user1598390
    Reading a recent question: Is it actually possible to have a 'useful' programming language that isn't Turing complete?, I've come to wonder if non Turing-complete programming languages are considered programming languages at all. Since Turing-completeness means a language has to have variables to store values as well as control structures ( for, while )... Is a language that lacks these features considered a programming language ?

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  • Functional vs. Non-Functional Requirements vs Design ideas in an SRS

    - by Nicholas Chow
    For a school project, I had to create a SRS for a "fictional" application. However they did not show us what it exactly entails, and were very vague with explanations. The SRS asked of us has to have at least 5 functional requirements, 5 non functional requirements and 1 constraint. Now I have tried my best to make one however I there are still some uncertainties left, I hope you experts can tell me whether or not I am thinking in the right direction. I will keep on updating this posts as I have questions regarding requirements that are vague to me, thank you all in advance for making SRS more clear for me FR1 Registration of Organizer FR1 describes the registration of an Organizer on CrowdFundum FR1.1 The system shall display a registration form on the website. FR1.2 The system shall require a Name, Username, Document number passport/ID card, Address, Zip code, City, Email address, Telephone number, Bank account, Captcha code on the registration form when a user registers. FR1.3 The system shall check whether the Name, Username, Document number passport/ID card, Address, Zip code, City, Email address, Telephone number, Bank account, Captcha code are filled out correctly within 1 seconds after a user submits the registration form. FR1.4 The system shall display an error message containing: “Registration could not be completed” to the subscriber within 1 seconds after the system check of the registration form was unsuccessful. FR1.5 The system shall send a verification email containing a verification link to the subscriber within 30 seconds after the system check of the registration form was successful. FR1.6 The system shall add the newly registered Organizer to the user base within 5 seconds after the verification link was accessed. Questions: FR1.1 Is this a functional requirement, or have I incorporated design idea in it by using "shall display on website". If so what would be a better way to write it? FR1.2 Is this better written in one requirement, or should I write each condition as a seperate requirement? FR1.3-1.5 Are these functional requirements or did I mix some non functional elements in it? How is it better phrased? FR1.3-1.6 Are these all correct functional requirements? As in free of ambiguity, complete, implementation free etc.

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  • What non-programming books should a programmer read to help develop programming/thinking skills?

    - by FeatureCreep
    There are a lot of questions about what programming books should be on the programmer's bookshelf. How about non-programming related books that can help you become a better programmer or developer? It would also be interesting to know why they would help. My first choice would be Sun Tzu's "Art of War" (however cliché), because it made it obvious that the success of any project depends on the strength of its weakest link (and warfare is a big project).

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  • How do you explain refactoring to a non-technical person?

    - by Benjol
    (This question was inspired by the most-voted answer here) How do you go about explaining refactoring (and technical debt) to a non-technical person (typically a PHB or customer)? ("What, it's going to cost me a month of your work with no visible difference?!") UPDATE Thanks for all the answers so far, I think this list will provide several useful analogies to which we can point the appropriate people (though editing out references to PHBs may be wise!)

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  • What non-programming books should a programmer read (that helps developing programming skills/thinking)?

    - by FeatureCreep
    There are a lot of questions about what programming books should be on the programmer's bookshelf. How about non-programming related books that can help you become a better programmer or developer? It would also be interesting to know why they would help. My first choice would be Sun Tzu's "Art of War" (however cliché), because it made it obvious that the success of any project depends on the strength of its weakest link (and warfare is a big project).

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  • How to fix: "NPMethod called on non-NPObject wrapped JSObject" error?

    - by chandra
    HI, I am trying to call a method defined in flash object from javascript (firefox-3.0/Linux) and getting the exception: "NPMethod called on non- NPObject wrapped JSObject". If I use eval on window.document.flash_object.func() it throws "NPMethod called on non-NPObject wrapped JSObject". Where as, if I define a javascript function in side the page as given below: function myFunc() { return flash_object.func(); } and later do a eval of window.document.myFunc() it works fine. I am running the two evals through a test framework called Selenium. [eval(window.document.flash_object.func()) and eval(window.document.myFunc())]. The issues seems to be issue with invoking the flash-object method without passing 'this' reference. Here is sample html/js code to reproduce this issue: "NPMethod called on non-NPObject wrapped JSObject". <script> function changeColor() { mymovie.changeColor(); } function getColorNP() { var func = mymovie.getColor; func(); } </script> <button type="button" onclick="getColorNP();">getColorNP</button> <button type="button" onclick="getColor();">getColor</button> getColorNP throws the exception Error: NPMethod called on non-NPObject wrapped JSObject! Source File: http://my.host/Colors/colors.html getColorNP throws the exception Error: NPMethod called on non-NPObject wrapped JSObject! Source File: http://my.host/Colors/colors.html Now, question to javascript gurus: Given flash object and a method name, how do I invoke the method on that object. Lets say, a function takes two arguments: a flash object, and a method name as string. I want to do an eval on object.method() inside that function. Is this possible, if so, can you please explain me how this can be done. As flash object's method is not a standard javascript function, i think its not possible to function binding through bind(). Is there any other alternative? Thx, Chandra

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  • How do I use a dependency on a Perl module installed in a non-standard location?

    - by Kinopiko
    I need to install two Perl modules on a web host. Let's call them A::B and X::Y. X::Y depends on A::B (needs A::B to run). Both of them use Module::Install. I have successfully installed A::B into a non-system location using perl Makefile.PL PREFIX=/non/system/location make; make test; make install Now I want to install X::Y, so I try the same thing perl Makefile.PL PREFIX=/non/system/location The output is $ perl Makefile.PL PREFIX=/non/system/location/ Cannot determine perl version info from lib/X/Y.pm *** Module::AutoInstall version 1.03 *** Checking for Perl dependencies... [Core Features] - Test::More ...loaded. (0.94) - ExtUtils::MakeMaker ...loaded. (6.54 >= 6.11) - File::ShareDir ...loaded. (1.00) - A::B ...missing. ==> Auto-install the 1 mandatory module(s) from CPAN? [y] It can't seem to find A::B in the system, although it is installed, and when it tries to auto-install the module from CPAN, it tries to write it into the system directory (ignoring PREFIX). I have tried using variables like PERL_LIB and LIB on the command line, after PREFIX=..., but nothing I have done seems to work. I can do make and make install successfully, but I can't do make test because of this problem. Any suggestions? I found some advice at http://servers.digitaldaze.com/extensions/perl/modules.html to use an environment variable PERL5LIB, but this also doesn't seem to work: export PERL5LIB=/non/system/location/lib/perl5/ didn't solve the problem.

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  • Is there an use case for non-blocking receive when I have threads?

    - by Gabriel Šcerbák
    I know non-blocking receive is not used as much in message passing, but still some intuition tells me, it is needed. Take for example GUI event driven applications, you need some way to wait for a message in a non-blocking way, so your program can execute some computations. One of the ways to solve this is to have a special thread with message queue. Is there some use case, where you would really need non-blocking receive even if you have threads?

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  • Why would I want to have a non-standard attribute?

    - by dontWatchMyProfile
    The documentation on Core Data entities says: You might implement a custom class, for example, to provide custom accessor or validation methods, to use non-standard attributes, to specify dependent keys, to calculate derived values, or to implement any other custom logic. I stumbled over the non-standard attributes claim. It's just a guess: If my attribute is anything other than NSString, NSNumber or NSDate I will want to have a non-standard Attribute with special setter and getter methods? So, for example, if I wanted to store an image, this would be a non-standard Attribute with type NSData and a special method, say -(void)setImageWithFileURL:(NSURL*)url which then pulls the image data from the file, puts in in an NSData and assigns it to core data? Or did I get that wrong?

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  • How to disable "sender non-delivery notification" in postfix?

    - by David MZ
    I want postfix to stop sending non-delivery notifications to my local account, here is example from my log 17:47:08 A727B62C6F61: message-id=<20121124174708.A727B62C6F61@mail.***********> 17:47:08 F151362C6F5F: sender non-delivery notification: A727B62C6F61 17:47:08 A727B62C6F61: from=<>, size=4676, nrcpt=1 (queue active) 17:47:08 F151362C6F5F: removed 17:47:08 warning: dict_nis_init: NIS domain name not set - NIS lookups disabled 17:47:08 A727B62C6F61: to=<**********>, relay=local, delay=0.01, delays=0/0.01/0/0, ... How can I configure this in my main.cf?

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  • What are some good hosted issue tracking systems for non-developers?

    - by Knox
    This question is similar to Good Open Source issue tracking systems for non-developers but in our case, we would prefer a hosted solution. The users are end-users, on the low end of computer literate, non developers. We have around 5 support people and 50 or so end users. We are interested in simple issue tracking, like a printer being down, as opposed to project or bug tracking. Email integration is desired.

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  • Should I use non-standard tags in a HTML page for highlighting words?

    - by rcs20
    I would like to know if it's a good practice or legal to use non-standard tags in an HTML page for certain custom purposes. For example: Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam consequat, felis sit amet suscipit laoreet, nisi arcu accumsan arcu, vel pulvinar odio magna suscipit mi. I want to highlight "consectetur adipiscing elit" as important and "nisi arcu accumsan arcu" as highlighted. So in the HTML I would put: Lorem ipsum dolor sit amet, <important>consectetur adipiscing elit</important>. Nullam consequat, felis sit amet suscipit laoreet, <highlighted>nisi arcu accumsan arcu</highlighted>, vel pulvinar odio magna suscipit mi. and in the CSS: important { background: red color: white; } highlighted { background: yellow; color: black; } However, since these are not valid HTML tags, is this ok?

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