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• How to keep a floating div centered on window resize

  - by Jimbo

  Is there a way (without binding to the window.resize event) to force a floating DIV to re-center itself when the browser window is resized? To help explain, I imagine the pseudocode would look something like: div.left = 50% - (div.width / 2) div.top = 50% - (div.height / 2)

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• Do I need to drop index on temp table?

  - by Phil

  Hi, Fairly simple question, but I don't see it anywhere else on SO: Do indexes (indices?) on a temporary table get automatically deleted with the temporary table? I'd imagine they do but I don't really know how to check to make sure. Thanks, Phil

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• Help to implement if-statement with array values

  - by erGo

  Hi all. I have a following source code php+js: http://pastebin.org/277948 I want to rewrite it using pure JS, but can’t imagine the way. Any advices are appreciated.

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• how can i tell if a javascript function works across browsers

  - by lowellk

  How can I tell if a given javascript function will work across browsers? For instance, I want to use String.trim() and I see that it works in Firefox, but will it work in all the other major browsers? I imagine there is a good doc online somewhere, but I can't find it.

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• C#, LINQ. How to find an element within group of elements

  - by Bobb

  Imagine you have int[] data = new int [] { 1, 2, 1, 1, 3, 2 } I need sub-array with only those which conform to a condition data[i] data[i-1] && data[i] data[i + 1]... i.e. I need all items which stick over their immediate neighbours. From example above I should get { 2, 3 } Can it be done in LINQ? Thanks

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• C++/CLI, I have a Byte[] and I need a char* to the first and last elements.

  - by Jacob G

  I've been handed a Byte[] that contains a file. I need to pass this to another method that is expecting two parameters, a char* to the beginning of the file and a char* to the end of the file. I'm assuming I need to pin the array first so it doesn't get collected. I don't imagine I can then just cast the first and last elements, right?

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• what is the most elegant way in ruby to remove a parameter from url?

  - by dimus

  I would like to take out a parameter from url by it's name without knowing if it is the first, middle or last parameter and reassemble url again. I guess it is not that hard to write something on my own using CGI or URI, but I imagine such functionality exists already. Any suggestions? in: http://example.com/path?param1=one&param2=2&param3=something3 out: http://example.com/path?param2=2&param3=something3

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• Faster code with another compiler

  - by Andrei

  I'm using the standard gcc compiler in math software development with C-language. I don't know that much about compilers or compiler options, and I was just wondering, is it possible to make faster executables using another compiler or choosing better options? The default Makefile sets options -ffast-math and -O3 and I think both of them have some impact in the overall calculation time. My software is using memory quite extensively, so I imagine some options related to memory management might do the trick? Any ideas?

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• resampling a series of points

  - by clamp

  hello, i have an array of points in 3d (imagine the trajectory of a ball) with X samples. now, i want to resample these points so that i have a new array with positions with y samples. y can be bigger or smaller than x but not smaller than 1. there will always be at least 1 sample. how would an algorithm look like to resample the original array into a new one? thanks!

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• JPA and compatibility with persistance providers and databases vendors

  - by Kartoch

  JPA promises to be vendor neutral for persistence and database. But I already know than some persistence frameworks like hibernate are not perfect (character encoding, null comparison) and you need to adapt your schema for each database. Because there is two layers (the persistence framework and database), I would imagine they're some work to use some JPA codes... Does anyone has some experiences with multiple support and if yes, what are the tricks and recommendations to avoid such incompatibilities ?

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• C Language Standard Collections Where Are They?

  - by flaxeater

  I have committed to learning C now, I'm good with Python/PHP/Bash but I've decided I'm limited by not being fluent in C. However I cannot imagine working in a language without lists and hashes, maybe I'm just jumping a gun, but surely there are 'standard' collection libraries. I do not see any in the GNU standard lib though, any suggestions?

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• concatenate arbitrary long list of matches in SQL subquery

  - by lordvlad

  imagine 2 tables (rather stupid example, but for the sake of simplicity, here you go) words word_id letters letter word_id how can i select all words while selecting all letters that belong to a word and concatenating them to said word? it is important that the letters are returned in the order they appear in the table, as the letter may be mixed into other words, but the order is correct. |word_id| |word_id|letter| +-------+ +-------+------+ | 1| | 1| H| | 2| | 2| B| | 2| Y| | 1| I| | 2| E| should return |word_id|word| +-------+----+ | 1| HI| | 2| BYE| any way to accomplish this in pure SQL?

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• Should I use Java for a custom Swing component designed for a clojure app?

  - by nansen

  I want a simple timeline component (like in video editing software) for a clojure/seesaw app and I am wondering if it is a good approach to implement this directly with clojure and seesaw or if I should write it in java and make my clojure wrapper around it. Or more generally: is a functional programming language optimal for writing UI widgets? I cannot imagine doing that without a lot of state involved. And wasn't OO invented for UI-development in the first place?

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• How to create 'greater than' arrow using CSS only?

  - by metal-gear-solid

  Is it possible to make these arrows with CSS and with all browser compatible including IE,6,7,8 or image is the only option? Home Products Digital camera

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• Why does this compile?

  - by akf

  I was taken aback earlier today when debugging some code to find that something like the following does not throw a compile-time exception: public Test () { HashMap map = (HashMap) getList(); } private List getList(){ return new ArrayList(); } As you can imagine, a ClassCastException is thrown at runtime, but can someone explain why the casting of a List to a HashMap is considered legal at compile time?

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• Adding an additional click event to every element (JavaScript / jQuery)

  - by Gausie

  I'm developing a touchscreen application that, aside from everything else, records the amount of times the screen is used so that the user can be reminded to clean the screen after a predefined number of clicks. I've got the click functions written nicely, all I need now is make sure the function is called on a click. I imagine $('*').click(function() { //do something }); would accomplish my goal, but is that the best way? Also, would that overwrite other click functions assigned to the elements?

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• Getting the old value of a asp.net control on postback

  - by D3no

  I want to be able to find the old value of a asp.net control (textbox, checkbox etc) without relying on events (e.g. OnTextChange event). Something like "someTextboxControl.OldText" would be perfect! I imagine that it is stored in the viewstate and need to somehow get at it via a custom control. Any ideas?

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• How to get CVS notification emails to contain link to diff ?

  - by Ro

  Hi All, Is there any way to get CVS e-mail notifications to inlude links to my ViewCVS server where clicking a link could bring up the diff ? Currently my loginfo file just has entries like this ^installation cat | /usr/bin/Mail -s "[cvs-update installation]" [email protected] The e-mails we all then get (Afairly standard I imagine) contain the commit message and list of files changed. Cheers, Ro

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• What's the difference between 'service' and 'server'?

  - by bonefisher

  I can imagine that the 'server' can be a machine/host but can be also a program like ftp server, smtp server, etc.. The 'service' on the other hand refers mainly to applications/programms.. Why can then for example the Sql Server cannot be called as Sql Service? It has the same semanthics. Or the other way round: MS Azure service: why it isn't called Azure Server? :)

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• Is there a way to visualize records stored in an iPhone app via Core Data?

  - by Justin Searls

  I have an app which, for good reasons, can only be debugged on a device. I'm using Core Data for the first time, and I'd like to be able to easily inspect the records that are stored by the app on the device. I imagine that Core Data is by default backed by SQLite on the iPhone, so this question might be as simple as asking: "What's the easiest way to extract the SQLite database for an app installed by Xcode without jailbreaking it?" Any experience someone could lend regarding this would be greatly appreciated.

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• How does pattern matching work behind the scenes in F#?

  - by kryptic

  Hello Everyone, I am completely new to F# (and functional programming in general) but I see pattern matching used everywhere in sample code. I am wondering for example how pattern matching actually works? For example, I imagine it working the same as a for loop in other languages and checking for matches on each item in a collection. This is probably far from correct, how does it actually work behind the scenes?

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• C#: How to replace "-" with " -" only when it's not preceded by "e"?

  - by MaDDoX

  I imagine I should use Regex for that but I still scratch my head a lot about it (and the only similar question I found wasn't exactly my case) so I decided to ask for help. This is the input and expected output: Input: "c-0.68219,-0.0478 -1.01455-0.0441 0.2321e-4,0.43212" Output:"c -0.68219,-0.0478 -1.01455 -0.0441 0.2321e-4,0.43212" Basically I need either commas or spaces as value separators, but I can't break the exponential index (e-4). Maybe do two successive replacements?

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• How to get all captures of subgroup matches with preg_match_all()?

  - by hakre

  Update/Note: I think what I'm probably looking for is to get the captures of a group in PHP. Referenced: PCRE regular expressions using named pattern subroutines. (Read carefully:) I have a string that contains a variable number of segments (simplified): $subject = 'AA BB DD '; // could be 'AA BB DD CC EE ' as well I would like now to match the segments and return them via the matches array: $pattern = '/^(([a-z]+) )+$/i'; $result = preg_match_all($pattern, $subject, $matches); This will only return the last match for the capture group 2: DD. Is there a way that I can retrieve all subpattern captures (AA, BB, DD) with one regex execution? Isn't preg_match_all suitable for this? This question is a generalization. Both the $subject and $pattern are simplified. Naturally with such the general list of AA, BB, .. is much more easy to extract with other functions (e.g. explode) or with a variation of the $pattern. But I'm specifically asking how to return all of the subgroup matches with the preg_...-family of functions. For a real life case imagine you have multiple (nested) level of a variant amount of subpattern matches. Example This is an example in pseudo code to describe a bit of the background. Imagine the following: Regular definitions of tokens: CHARS := [a-z]+ PUNCT := [.,!?] WS := [ ] $subject get's tokenized based on these. The tokenization is stored inside an array of tokens (type, offset, ...). That array is then transformed into a string, containing one character per token: CHARS -> "c" PUNCT -> "p" WS -> "s" So that it's now possible to run regular expressions based on tokens (and not character classes etc.) on the token stream string index. E.g. regex: (cs)?cp to express one or more group of chars followed by a punctuation. As I now can express self-defined tokens as regex, the next step was to build the grammar. This is only an example, this is sort of ABNF style: words = word | (word space)+ word word = CHARS+ space = WS punctuation = PUNCT If I now compile the grammar for words into a (token) regex I would like to have naturally all subgroup matches of each word. words = (CHARS+) | ( (CHARS+) WS )+ (CHARS+) # words resolved to tokens words = (c+)|((c+)s)+c+ # words resolved to regex I could code until this point. Then I ran into the problem that the sub-group matches did only contain their last match. So I have the option to either create an automata for the grammar on my own (which I would like to prevent to keep the grammar expressions generic) or to somewhat make preg_match working for me somehow so I can spare that. That's basically all. Probably now it's understandable why I simplified the question. Related: pcrepattern man page Get repeated matches with preg_match_all()

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• Which computing publisher has the best refereed research resources for the working programmer?

  - by Stephen

  When I have a problem I often search the computing literature. Some of the resources[*] I use are: The professional associations? ACM Digital Library IEEE Xplore The scientific publishers? Lecture Notes in Computer Science HCI Bibliography What do you use? What is the best resource source (if there is one) for the working programmer? [*] after stackoverflow and google of course :) PS what tags should I use for this question?

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• HTML5 elements working in Chrome but not Safari or Firefox?

  - by Chris Armstrong

  Hi, I'm using the HTML5 elements and in a project i'm working on (see it here) and the css seems to be working fine in Chrome. However, it doesn't appear to be working in Safari or Firefox (I haven't tested IE, but I'd imagine it's the same), and the page layout is all over the place. Any ideas why this may be? I know Firefox and Safari both support these elements, and Safari is webkit-based like Chrome, so I can't figure out what the problem is.

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