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• Cheap and cheerful rand() replacement.

  - by Mick

  After profiling a large game playing program, I have found that the library function rand() is consuming a considerable fraction of the total processing time. My requirements for the random number generator are not very onerous - its not important that it pass a great battery of statistical tests of pure randomness. I just want something cheap and cheerful that is very fast. Any suggestions?

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• strict string to int[long]

  - by baskin

  Do we have a standard way of converting a char* to int (or long) in a strict way, i.e. we should get proper result only if all characters are digits and can fit in an int (or long) -- some way by using strtol etc.. ? Thus "sbc45", "4590k", " 56", "56 ", should be all invalid using that function.

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• What is prepare_arch_schedule for?

  - by EpsilonVector

  I'm messing around with Linux kernel 2.4 and function schedule() in sched.c uses the macro prepare_arch_schedule, which appears to be an infinite loop. What is that? And how does it finish?

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• Change the key being pressed with C#

  - by Benny

  Hey, I'm trying to write a program in C# that will track the pressing of certain keys (using a keyboard hook), and send different ones instead. For instance, when I press the A key it will instead send the Q key. I used http://www.codeproject.com/KB/cs/CSLLKeyboardHook.aspx this for my hooks and tried to use the SendKeys function, but I get an exception about the garbage collector destroying some object inside the hook class.

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• Javascript Array.forEach HowTo break?

  - by Scott

  [1,2,3].forEach(function(el) { if(el === 1) break; }); How can I do this using the new forEach method of JS?

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• Show information over image on rollover

  - by Chris

  I want to be able to show information (HTML basically) over an image when the mouse rolls over the image... I know there is a .hover() jQuery function but am unsure how to use it to get the desired effect. Ideally when a user hovers over an image it would "grey out" (e.g. layer of 50% opacity black) with some HTML like a title etc etc. Can someone point me in the right direction or provide sample code Thanks

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• About gcc -mwindows

  - by user198729

  What does -mwindows mean and how does it work exactly? Does it internally change the main function to WinMain ?

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• How can I strip invalid XML characters from strings in Perl?

  - by AndrewR

  I'm looking for what the standard, approved, and robust way of stripping invalid characters from strings before writing them to an XML file. I'm talking here about blocks of text containing backspace (^H) and formfeed characters etc. There has to be a standard library/module function for doing this but I can't find it. I'm using XML::LibXML to build a DOM tree that I then serialize to disk.

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• Scope of const char*

  - by Neeraj

  Consider this code: const char* someFun() { // ... some stuff return "Some text!!" } int main() { { // Block: A const char* retStr = someFun(); // use retStr } } My question is in the function sumFun() where is "some Text!!", stored (i think may be in some static area in ROM) and what will be its scope? Will the memory pointed by retStr be occupied throughout the program or be released once the block A exits? -- Thanks

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• broken UTF-8 String ruby

  - by josh

  While reading a file I get broken UTF-8 String error whenever I have the following in my file través if I change it to normal e then it works. Whats the way to fix this? error only happens if I do line.lstrp or any other function. Just printing the lines is ok. problem even happens when I try to match the string with regex.

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• xdebug profiler output strange results

  - by nic28

  I'm using xdebug to profile some PHP code on Windows and using WinCacheGrind/Webgrind to analyse the output, but I'm getting some strange results. Specifically, the total cumulative time for a single method is greater than 100%! How is it possible that more time is spent executing this function's code and all the functions that it calls than the total time it took to execute the whole script? What am I missing here?

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• PHP Get the last insert id from ODBC connection.

  - by praveenjayapal

  How do I get the last insert id from a database using a ODBC connection? I'm looking for a solution similar to the mysql_insert_id() function.

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• How can I get the error messages ,when there is a error happened in $.getJSON

  - by psjscs

  In "get_data" action ,there are some code like this: def get_data if params[:p]=='1' raise "error 1" elsif params[:p]=='2' raise 'error 2' else return data end end in view: <script> $.getJSON('/controller/get_data',function(){...}) </script> so,when some error has raised,how can i get it! Tks!

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• return value of main() in windows

  - by sisis

  In Linux, the return value of the main function is stored in $?, and can be shown using echo $?. Is there something equivalent in Windows?

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• Catching screen prints in Java

  - by Amir Rachum

  There's a class I'm working with that has a display() function that prints some information to the screen. I am not allowed to change it. Is there a way to "catch" the string it prints to the screen externally?

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• how to access char*** from dll import in C#

  - by mavrick

  I have a function in win32 dll with signature as: void func1(int a, char*** outData) int a -- input parameter char*** outData -- output parameter - pointer to array of char strings Any idea how to access this in C# using dll import & what should be the signature.

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• ID generator with local static variable - thread-safe?

  - by Poseidon

  Will the following piece of code work as expected in a multi-threaded scenario? int getUniqueID() { static int ID=0; return ++ID; } It's not necessary that the IDs to be contiguous - even if it skips a value, it's fine. Can it be said that when this function returns, the value returned will be unique across all threads?

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• How do I call functions inside c++ dll from lua?

  - by Brian T Hannan

  I have a dll written in C++ that is legacy code and cannot modify the source code. I want to be able to call some of the functions inside of the dll from lua. For example, I'd like to do something like this: -- My Lua File include(myCppDll.dll) function callCppFunctionFromDll() local result = myCppFunctionFromDll(arg1, arg2) --Do something with result here end Is something like this possible?

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• SQL Reporting Services: Finding the folder a report is in

  - by Bob

  Hi there, If I have the report name how can I programmatically get the name of the project/folder the report is in? So for example if I have a report like so http://server/Reports/Pages/Report.aspx?ItemPath=/ReportProject1/ReportName Given "ReportName" how can I figure out that the report is in the folder "ReportProject1"? So I guess is there a function where I can pass int he report name and get it's details or else query the report server for a list of its report folders and I can loop through these and check some how that the report is inside?

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• thresholding to distinguish small features in noisy data

  - by Daniel

  Hi, I'm wondering what type of threshold would work well for distinguishing features that are very small (small in the xy sense) in comparison with the full spread, if that makes sense. The graythresh() function in Matlab that uses the Otsu method doesn't work too well for my data. Otsu is a clustering method where I think the # of pixels should be similar in each class, which is not the case for me so when I employ it I get a threshold that is way too small and falls well within a lot of the background noise that remains even after filtering.

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• Checking if an overridden parent method exists before calling it

  - by Nate Wagar

  How would I go about ensuring that the overridden parent method exists before I call it? I've tried this: public function func() { if (function_exists('parent::func')) { return parent::func(); } } However the function_exists never evaluates to true.

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• Tooltip arrow right

  - by Tabatha M

  I'm trying to make this tooltip arrow point to the right towards the link. CSS .tooltipside { position: relative; cursor: help; display: inline-block; outline: none; } .tooltipside span { visibility: hidden; position: absolute; bottom: -22px; z-index: 999; width: 52px; margin-left: -63px; padding: 2px; border: 1px solid #80a7ba; background-color: white; -moz-border-radius: 4px; border-radius: 4px; -moz-box-shadow: 0 1px 2px rgba(0,0,0,.4), 0 1px 0 rgba(255,255,255,.5) inset; -webkit-box-shadow: 0 1px 2px rgba(0,0,0,.4), 0 1px 0 rgba(255,255,255,.5) inset; box-shadow: 0 1px 2px rgba(0,0,0,.4), 0 1px 0 rgba(255,255,255,.5) inset; text-shadow: 0 1px 0 rgba(255,255,255,.4); } .tooltipside:hover { border: 0; /* IE6 fix */ } .tooltipside:hover span { visibility: visible; } .tooltipside span:before, .tooltipside span:after { content: ""; position: absolute; z-index: 1000; bottom: -7px; left: 50%; margin-left: -8px; border-top: 8px solid #80a7ba; border-left: 8px solid transparent; border-right: 8px solid transparent; border-bottom: 0; } .tooltipside span:before { border-top-color: #ccc; bottom: -8px; } ? The html is <a href='#' class='tooltipside'><span> <img src='http://cdn2.iconfinder.com/data/icons/32pxmania/misc_57.png' border='0' width='52' height='52'></span>LINK</a> TEST TEST TEST</b>? It currently points down in the center of the tooltip I need it to point right towards the link. How would I do this? Thanks

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• How to get parallel behavior in Java Script ?

  - by Biswanath

  More or less I want to execute two functions in parallel. One way as I see is doing through SetTimeOut function. I have not completely gone through the ReactiveExentension, although it looks promising but may be overkill for my needs. Is there any framework which supports parallelism ? My use case is trivial, but I would like to know if anybody heavily needed parallelism in Java Script ? Thanks, Biswanath.

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• Why doesn't (apply or [true false]) work in Clojure?

  - by Trilok

  From what I understand about apply, it unpacks a list and turns the elements into arguments for a function. I see that (apply + [1 2 3]) works as expected, i.e: it's equivalent to (+ 1 2 3). Why then is (apply or [true false]) invalid? Isn't it equivalent to (or true false) ?

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• Making Postgres SQL minimal size

  - by voipsecuritydigest.com

  I want to cut Postgres to its minimal size for purpose of including just database function with my application. I'm using Portable Postgres found on internet. Any suggestions what I can delete from Postgres installation which is not needed for normal database use?

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