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  • extendible hashing

    - by Phenom
    I need to make a program that shows the hash value of a given key, using extendible hashing. In extendible hashing, I know that the buckets split and directories change. So if I make my program, do I have to already know things like if the bucket it hashes to is filled, or do I not have to worry about those things and just compute a hash value based on the key?

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  • What's your approach to testing iPhone / iPad apps?

    - by R0MANARMY
    When developing for iPhone/iPad do you Do unit/integration/etc testing? What framework(s) do you use? What other framework(s) have you tried (if you decided to not use them, why not?) NOTE This is based on a question asked a few days ago (that has since been heavily edited). Question generated some interesting responses that may be useful to aggregate in one place.

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  • Webkit ondrop event while dragging

    - by monmonja
    I'm trying to drag one img and so it fires ondragenter for IE and dragover event for standard browsers, on IE and FF after the user drags it could fire ondrop event however on Webkit based (chrome and safari), i need to cancel or preventDefault() on the dragover event, doing that so will disable the dragging. Any idea on solving this? Thanks

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  • iOS: how to understand the role of rootviewcontroller and its relationship with other objects

    - by Anthony Kong
    I have created a UISplitViewController based iOS app in XCode 3.2.5 Below is a screen shot of Interface builder showing the rootviewcontroller and how it is linked to other objects. Being a beginner myself, I do not understand: 1) What is the role of the rootviewcontroller? Searched the documentation but what I found did not answer this question. 2) I thought a IBOutlet should only link to one corresponding object. Why in this case the rootviewcontroller is linked to two?

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  • Shared Hudson installation - how to enable access to git over ssh?

    - by tputkonen
    We are trying to set up a Hudson server and share it between different projects. Hudson authenticates users against our Windows domain AD, and the project based security matrix makes it easy to manage who can access which projects. Remaining issue is, that most of the projects use git over ssh. Is there a way to make shared Hudson access git so that each project could create their and manage their own jobs without compromising security?

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  • This code appears to achieve the return of a null reference in C++

    - by Chuck
    Hi folks, My C++ knowledge is somewhat piecemeal. I was reworking some code at work. I changed a function to return a reference to a type. Inside, I look up an object based on an identifier passed in, then return a reference to the object if found. Of course I ran into the issue of what to return if I don't find the object, and in looking around the web, many people claim that returning a "null reference" in C++ is impossible. Based on this advice, I tried the trick of returning a success/fail boolean, and making the object reference an out parameter. However, I ran into the roadblock of needing to initialize the references I would pass as actual parameters, and of course there is no way to do this. I retreated to the usual approach of just returning a pointer. I asked a colleague about it. He uses the following trick quite often, which is accepted by both a recent version of the Sun compiler and by gcc: MyType& someFunc(int id) { // successful case here: // ... // fail case: return *static_cast<MyType*>(0); } // Use: ... MyType& mt = somefunc(myIdNum); if (&mt) // test for "null reference" { // whatever } ... I have been maintaining this code base for a while, but I find that I don't have as much time to look up the small details about the language as I would like. I've been digging through my reference book but the answer to this one eludes me. Now, I had a C++ course a few years ago, and therein we emphasized that in C++ everything is types, so I try to keep that in mind when thinking things through. Deconstructing the expression: "*static_cast(0);", it indeed seems to me that we take a literal zero, cast it to a pointer to MyType (which makes it a null pointer), and then apply the dereferencing operator in the context of assigning to a reference type (the return type), which should give me a reference to the same object pointed to by the pointer. This sure looks like returning a null reference to me. Any advice in explaining why this works (or why it shouldn't) would be greatly appreciated. Thanks, Chuck

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  • How can I display different icons for same file extension

    - by ScottCate
    Visual Studio has *.SLN files for 2008, and 2010. In explorer, the icon associated with the file is based on the version somehow. I was always under the impression that the associated icon just looked at the extension, but obviously there is more going on. I'm asking on stack overflow as a developer - for my application, but if you feel this belongs on another forum, I'm happy to move the discussion elsewhere. Thank you!

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  • Xcode 4.2 MultiView App

    - by doc92606
    i am a fairly new iOS programmer, and I've lately been having trouble with my multi view app. Im using a paged based application with two view. I just don't seem to be able to make an IBAction that allows me to switch between each view. i tried using: [self presentModalViewController: SecondViewController animated: YES]; but i keep getting an error that says: "use of undeclared identifier 'SecondViewController'

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  • Interactive map solution suggestions

    - by fyasar
    Dear All, I'm looking to browser based map solution like google interactive chart map. I googled and i looked to smilar solution, but i didn't find good solution for it. It should be possible to created on flash, silverlight, ajax etc. And should be change parameters easyly via javascript or sth. But i didn't like google chart beacuse you cannot change background of map, you cannot use different colors for some countries. Do you have any suggestions about it ?

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  • htaccess redirect to www excluding subdomains both https and http

    - by wes
    So this is what I currently have, I'm trying to redirect http://something.com to http://www.something.com but if its a subdomain do no such things, so http://other.somethings.com will stay the same AND conditional based on https/http Currently have.. RewriteCond %{HTTP_HOST} !^www. RewriteRule ^(.*)$ http://www.%{HTTP_HOST}/$1 [R=301,L]

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  • jQuery Prototype conflict, alternative solutions

    - by lbolognini
    I have a problem as I'm conditionally including the Prototype-based Lightbox script for IE6 as it works better than the jQuery plugin. Of course the two libraries conflict but the official solution is not really feasible for me as i would have to replace tons of $ with the alternative no-conflict syntax. Is there any other solution for me, keeping in mind that in my case it would be easier to have Prototype work nicely with jQuery than the other way around?

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  • Recipes/tutorials/libraries for GUI-like terminal navigation (vim/lynx-style)?

    - by qgi
    Several console based applications like vim or lynx offer a rich user interface which enables the user to navigate freely around the console, manipulate data directly on screen, access menus and much more, similar to "modern" gui applications. How is that being achieved in principal on Unix/Linux with C++? Do you directly manipulate some kind of character buffer or is the screen constantly cleared and reprinted to stdout? Is there a set of libraries to implement such behavior or even some kind of a "modern" event-driven GUI toolkit for the console?

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  • How can I do monthly subscription credit card billing?

    - by NotDan
    I've written a subscription based web app that I want to charge (by credit card) a monthly fee. There are 3 different plans and once they sign up, they should be billed that amount, automatically, every month until they cancel. Is there an easy way to set this up (some sort of online service maybe?).

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  • Fluid width Son of Suckerfish dropdown menus

    - by derekerdmann
    For CSS dropdown menus, I usually stick with the Son of Suckerfish dropdowns. The technique works extremely well, but there's one small thing that's always bothered me: the width of the dropdown links is always fixed. Are there any ways to automatically resize the width of the items in a Suckerfish dropdown menu? If not, are there any other CSS-based dropdown menu strategies that can accomplish this?

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  • Automatically update or delete record(s) after x time in coldfusion

    - by Nich
    Hi, I've searched all over the net for this. Hope that someone's got something. How would a record in a database be updated automatically after x time n coldfusion? I know how to manually do it by writing an sql that performs an action to all records older than x time based on the timestamp. How would this be done automatically? Kind Regards, Nich

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  • Can you selectively enable or disable 'FilterDescriptors' in silverlight 4?

    - by Simon_Weaver
    In Silverlight with RIA services it is very easy to implement simple data filtering with 'FilterDescriptor' instances. However I've got a case where I have several filters and I want to enable or disable them based on other filters. It seems like a simple 'Enabled' property would make this really easy - but there is none. Is there a way to achieve this without just manually defining all the filters I need every time the relevant checkbox is checked.

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  • Looking for a filtered dropdown list for ASP.NET.

    - by ProfK
    I have some DropDownList controls where the list is very large, so I would like to have a means for the user to filter the list, either based on other fields, e.g. region, or on the first letters typed in a textbox. How can I achieve this in ASP.NET? Is the an open source control out there that will help me?

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  • Internet Explorer dont show a piece of my site

    - by Ramza
    Hi guys, i am creating a new site, based in a pre-existing web page The original site is http://oasisrio.intermediasp.com/ Its works great in Firefox, Chrome, and IE But the new one "oasisba.intermediasp.com" Dont show the right bar in IE, i check all that i can think about and i dont found the problem. Someone have any ideas why this is happening? PD: Sorry for my crapy english

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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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