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• Any chance to get Core Data using Tokyo Cabinet as the persistent store?

  - by dontWatchMyProfile

  I watched a free high quality video with Aaron Hillegass about Core Data vs Tokyo Cabinet. Besides that this guy is amazingly funny (really, if you want to laugh now, watch it!), he shows off Tokyo Cabinet beeing about 40x faster than Core Data. I wonder if it's worth thinking about how to attach this to Core Data? Does that make any sense? Maybe as a custom atomic store or something like this?

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• SQL Like question

  - by mike

  Is there a way to reverse the SQL Like operator so it searches a field backwards? For example, I have a value in a field that looks like this "Xbox 360 Video Game". If I write a query like below, it returns the result fine. SELECT id FROM table WHERE title like "%Xbox%Game%" However, when I search like this, it doesn't find any results. SELECT id FROM table WHERE title like "%Video%Xbox%" I need it to match in any direction. How can I get around this?

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• DNN 5.0 Modules available for Free or less cost

  - by Harryboy

  I am just planning to work on CMS with some features like blog, forum, chat, broadcast, video, Document management, poll, dashboard, advertisement, alerts & reminder, events, task etc.. I am thinking of using DNN for development as i feel most of the modules are available so i just need to do the customization. Also suggest what all are the modules available in core DNN (Community version) is anybody is having list what all are the modules available for DNN 5.0 ? Please provide the link for the same.

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• How can it be impossible to "decrypt" an MD5 hash?

  - by Rob

  I was reading a question about MD5, and it made me remember something that boggles me. Very simple question, and I'm sorry if it's not a good one. I just can't understand how you convert something to one thing using some algorithm, and there being no way to convert it back using the algorithm in reverse. So how is this possible? Also, since multiple strings can create the same MD5 hash, due to it being less data than the input string, how would any other hashing system be any better?

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• How to generate a unified diff in Ruby?

  - by jstayton

  After reading through this question about Ruby diff packages, I'm still not sure how to generate a unified diff from two text files. I'm not having trouble reading each file into a string (IO.read()), but I'm not finding any package that can generate a unified diff. Does one exist? Is doing a system call to diff even an option I should consider? (I'm thinking no.) Any help is appreciated! Thanks.

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• Windows Phone 7 emulator with a touchscreen

  - by tbischel

  I'm thinking about getting a small touchscreen to work with the Windows Phone 7 emulator... but will the developers tools support multi-touch from a touchscreen? I've only seen it with single mouse clicks so far...

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• Concatenation with Zero is not occuring properly in code?

  - by Vineet

  I was trying to reverse a number in pl/sql ,its working fine but when my number contain any 0,output come unexpected .for eg 1234 output 4321 1000 output 1 1203 ouput 3021 10001 output 1 DECLARE r number(9); num number(9):=&p_num; BEGIN WHILE num>=1 LOOP IF mod(num,10)=0 THEN -- extracting last digit of a number . r:=r||0; --if end digit is 0 then concat r with 0 ELSE r:=r||mod(num,10);--if mod is not 0 then it would be last digit. END IF; num:=trunc(num/10);--Removing last digit from number END LOOP; dbms_output.put_line(r); END;

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• Sharepoint Collaboration Portal initial size

  - by tousle

  Around how much space does a Sharepoint Collaboration Portal use up by default (when newly created)? Just asking because I had one created but I'm thinking of using a Team Site site template--if the client won't be utilizing the default "features" of a Collaboration Portal.

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• Guiding a Robot Through a Path

  - by Hamza Yerlikaya

  I have a field filled with obstacles, I know where they are located, and I know the robot's position. Using a path-finding algorithm, I calculate a path for the robot to follow. Now my problem is, I am guiding the robot from grid to grid but this creates a not-so-smooth motion. I start at A, turn the nose to point B, move straight until I reach point B, rinse and repeat until the final point is reached. So my question is: What kind of techniques are used for navigating in such an environment so that I get a smooth motion? The robot has two wheels and two motors. I change the direction of the motor by turning the motors in reverse. EDIT: I can vary the speed of the motors basically the robot is an arduino plus ardumoto, I can supply values between 0-255 to the motors on either direction.

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• Hiding a value in an Android application

  - by Ewan

  Hi, I need to hide a value in a mobile (Android OS) application. As far as I can see, encrypting the value is of no use as the key to the encryption mechanism must be available to the program and is thus available to an attacker reverse-engineering the code. So, it seems that the only "solution" is to hide the secret value in the application as well as possible, obviously not ideal. Any comments? Am I missing something? If not, what's the best way to hide the value? Thanks for your ideas! Ewan

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• Fast ruby http library for large XML downloads

  - by Vlad Zloteanu

  I am consuming various XML-over-HTTP web services returning large XML files ( 2MB). What would be the fastest ruby http library to reduce the 'downloading' time? Required features: both GET and POST requests gzip/deflate downloads (Accept-Encoding: deflate, gzip) - very important I am thinking between: open-uri Net::HTTP curb but you can also come with other suggestions. P.S. To parse the response, I am using a pull parser from Nokogiri, so I don't need an integrated solution like rest-client or hpricot.

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• Good Hash Function for Strings

  - by Leif Andersen

  I'm trying to think up a good hash function for strings. And I was thinking it might be a good idea to sum up the unicode values for the first five characters in the string (assuming it has five, otherwise stop where it ends). Would that be a good idea, or is it a bad one? I am doing this in Java, but I wouldn't imagine that would make much of a difference.

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• Where do you download a package with java.exe?

  - by Derek

  I was trying to run this java ee program with session beans which involves the 'ant' command apparently and when I try to run 'ant' it says... '"java.exe"' is not recognized as an internal or external command. Soooo I am thinking I need to get java.exe in order to use 'ant' properly. Where can I find it? What downloadable contains it?

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• OpenGL: the ultimate coordinate system confusion solution?

  - by Newbie

  I'm tired of thinking how the hell my coodinates are working at each case. I heard that I could flip the Y-axis by this code: glScalef(1, -1, 1); But should I? Doesnt this break some other external functions and lighting etc?

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• Applying different Cascade Style Sheets to the same html page

  - by Noona

  To apply a CSS to an existing html page I need to add a link that links to the css file, I am asked to include a link in the webpage that I am building that would link to the same html page but with a different css file, I am thinking I need to create a different css file, then create another .html page by copy the exact content from the first page and only change the link of the css file, but it doesn't seem so efficient and I am assuming there should be a standard method to do this. thanks

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• 256 colors, foreground and background

  - by push.cx

  This is a tale of two scripts and is related to a previous question. The two scripts are at http://gist.github.com/50692. The ansi.rb script displays all 256 colors on all 256 background colors. The ncurses.rb script displays all 256 foreground colors but the background displays the basic 16 and then seems to cycle through various attributes like blinking and reverse video. So what gives? Is this the bug in ncurses that it uses a signed integer for color pairs? (ie 'tput colors' says 256 but 'tput pairs' says 32767 instead 65536) It seems like if that were the case the first half of the colors pairs would display properly but the second half would repeat or get into the attributes as the int wraps.

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• Can I use ANTLR for both two-way parsing/generating?

  - by Mike Q

  Hi all, I need to both parse incoming messages and generate outgoing messages in EDIFACT format (basically a structured delimited format). I would like to have a Java model that will be generated by parsing a message. Then I would like to use the same model to create an instance and generate a message. The first half is fine, I've used ANTLR before to go from raw - Java objects. But I've never done the reverse, or if I have it's been custom. Does ANTLR support generating using a grammar or is it really just a parse-only tool?

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• jQuery color change or CSS?

  - by Josh

  I've tried achieving a hover/selected color change for a particular field, but I'm thinking jQuery is the answer. I've looked into some button click tutorials, but maybe I'm not just seeing it or doing it correctly. The idea here is that when a user hovers over a Headline, the background color changes, when they click the headline to expand it, the background color remains constant (selected), however as it stands right now the background color of the expanded fields do not change. Here is the demo: http://www.notedls.com/demo

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• Auto-generating toString Method

  - by Gordon

  Is it good or bad practice auto-generating toString methods for some simple classes? I was thinking of generating something like bellow where it takes the variable names and produces a toString method that prints the name followed by it's value. private String name; private int age; private double height; public String toString(){ Formatter formatter = new Formatter(); return formatter.format("Name: %s, Age: %d, Height %f", name, age, height).toString(); }

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• What's the best way to reference a .DLL - as a normal reference or as a web service?

  - by dotnetdev

  Hi, What is the best way to reference an existing .NET dll (Class library)? Is there any benefit to expose web services from the class library and reference these as opposed to referencing the actual .dll (Although one benefit of the web service approach is the granularity and thus surface area exposed is up to you at coding time)? I am thinking with loose coupling in mind, as a criteria. Thanks

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• Going international: tha language class or method in .net

  - by Nano HE

  Hi, I created a small WPF desktop application. I am thinking about how to make my application internationalized. Is there any Language Class to research (.NET 3.5 based)? I want to load the my application language from windows region/language configuration automatically. OR. some method to switch language from my application menu list.( no additional language package installation, assume the windowns system language packages support Chinese/English/Japanese/Korea already).

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• Django - calling full_clean() inside of clean() equivalent?

  - by orokusaki

  For transaction purposes, I need all field validations to run before clean() is done. Is this possible? My thinking is this: @transaction.commit_on_success def clean(self): # Some fun stuff here. self.full_clean() # I know this isn't correct, but it illustrates my point. but obviously that's not correct, because it would be recursive. Is there a way to make sure that everything that full_clean() does is done inside clean()?

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• HTTP URL Blacklist driver

  - by ondronr

  Hello, how to code HTTP URL blacklisting driver for both XP and Vista/7? I need it for special software for schools any ideas about HTTPS or VPN? I was thinking about firefox, IE,... extension. Not bulletproof, but better than nothing. It's just school. Thanks

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• Designing a state machine in C++

  - by skyeagle

  I have a little problem that involves modelling a state machine. I have managed to do a little bit of knowledge engineering and 'reverse engineer' a set of primitive deterministic rules that determine state as well as state transitions. I would like to know what the best practises are regarding: How to rigorously test my states and state transitions to make sure that the system cannot end up in an undeetermined state. How to enforce state transition requirements (for example, it should be impossible to go directly from stateFoo to StateFooBar, i.e. to embue each state with 'knowlege' about the states it can transition to. Ideally, I would like to use clean, pattern based design, with templates wherever possible. I do need somewhere to start though and I would be grateful for any pointers (no pun intended), that are sent my way.

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• How does assembly language interact with something like the Internet?

  - by Maulrus

  So I was thinking about languages the other day, and it struck me that any program written in a compiled language that interacts with the Internet is then translated into assembly that has to interact with the Internet. I've just begun learning a bit of x86 assembly to help me understand C++ a bit better, and I'm baffled by how something so low-level could do something like access the Internet. I'm sure the full answer to this question is much more than would fit in a SO answer, but could somebody give me maybe a basic summary?

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