boost range - Page 191 - Developer IT

The use of IN OUT in ada..

- by maddy

HI all, Given below is a code in ada with TYPE_VECT_B; use TYPE_VECT_B; Package TEST01 is procedure TEST01 ( In_State : IN VECT_B ; Out_State : IN OUT VECT_B ); function TEST02 ( In_State : IN VECT_B ) return Boolean ; end TEST01; The TYPE_VECT_B package specification and body is also defined below Package TYPE_VECT_B is type VECT_B is array (INTEGER range <>) OF BOOLEAN ; rounded_data : float ; count : integer ; trace : integer ; end TYPE_VECT_B; Package BODY TYPE_VECT_B is begin null; end TYPE_VECT_B; What does the variable In_State and Out_State actually mean?I think In_State means input variable.i just get confused to what actually Out_State means? Thanks Maddy

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What's the proper technical term for "high ascii" characters?

- by moodforaday

What is the technically correct way of referring to "high ascii" or "extended ascii" characters? I don't just mean the range of 128-255, but any character beyond the 0-127 scope. Often they're called diacritics, accented letters, sometimes casually referred to as "national" or non-English characters, but these names are either imprecise or they cover only a subset of the possible characters. What correct, precise term that will programmers immediately recognize? And what would be the best English term to use when speaking to a non-technical audience?

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Mmap and structure

- by blid..pl

I'm working some code including communication between processes, using semaphores. I made structure like this: typedef struct container { sem_t resource, mutex; int counter; } container; and use in that way (in main app and the same in subordinate processes) container *memory; shm_unlink("MYSHM"); //just in case fd = shm_open("MYSHM", O_RDWR|O_CREAT|O_EXCL, 0); if(fd == -1) { printf("Error"); exit(EXIT_FAILURE); } memory = mmap(NULL, sizeof(container), PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0); ftruncate(fd, sizeof(container)); Everything is fine when I use one of the sem_ functions, but when I try to do something like memory->counter = 5; It doesn't work. Probably I got something wrong with pointers, but I tried almost everything and nothing seems to work. Maybe there's a better way to share variables, structures etc between processes ? Unfortunately I'm not allowed to use boost or something similiar, the code is for educational purposes and I'm intentend to keep as simple as it's possible.

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PHP: Filling in the 'gaps' in an array

- by aboved

Hey gurus, I've got a php array (obtained through checkbox values in a form - as you know checkboxes only show up in the _POST variable when they are not set). Array ( [2] => 0,2 [3] => 0,3 ) I need a way to 'fill in' the gaps between the range 0-5. So above would look like (filling the empty spaces with '-1'. I tried array_merge() with an array filled with '-1' but that didn't work. Array ( [0] => -1 [2] => 0,2 [3] => 0,3 [4] => -1 [5] => -1 ) I think I may have gone down the wrong road with the problem I am trying to solve, but I have put too much time into this solution to back out - a feeling I am sure most of you are familiar with(!) Cheers!

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Ontology - Conflict of same individuals property and datatype property

- by blueomega

I am having a problem with "same individuals property" in protege, when i run a reasoner (pellet 1.5 or fact++) Lets take ontology example thing has class sons A and B, A has sons C and D. B, C and D have individuals of the same class. Cant i say a individual C is "same individual" as individual B, and then add also individual D is "same individual" as individual B. Wich is true, they have diferent names, but they are same individual.. Why does it only work when i set individual B has "same individual" of type C or D? The protege error is "InconsistentOntologyException:Fact++.Kernel: inconsistent Ontology" and pellet says ontology is inconsistent. EDIT: Seems its a more deep rooted problem, this example works :(, gonna keep checking. EDIT2: After some more experimenting, seems its a conflict with DataType properties. They all share a DataType properties with same name. In the example domain of property would be A and range string. Any idea how to solve?

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Classic ASP Site Throwing Date Conversion Error After Moving Servers?

- by leen3o

I am moving an old store from a Win2003 IIS6 server to a Win2008 IIS7 server, moved everything across including database. The front end seems to work just fine, but when I login it has to do pull in data based on date ranges and now from no where I am getting this error? The conversion of a varchar data type to a datetime data type resulted in an out-of-range value Any ideas why this would do this on the new server and NOT on the old one? No code has changed and the DB is a backup of the one from the old server??

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What can cause my code to run slower when the server JIT is activated?

- by durandai

I am doing some optimizations on an MPEG decoder. To ensure my optimizations aren't breaking anything I have a test suite that benchmarks the entire codebase (both optimized and original) as well as verifying that they both produce identical results (basically just feeding a couple of different streams through the decoder and crc32 the outputs). When using the "-server" option with the Sun 1.6.0_18, the test suite runs about 12% slower on the optimized version after warmup (in comparison to the default "-client" setting), while the original codebase gains a good boost running about twice as fast as in client mode. While at first this seemed to be simply a warmup issue to me, I added a loop to repeat the entire test suite multiple times. Then execution times become constant for each pass starting at the 3rd iteration of the test, still the optimized version stays 12% slower than in the client mode. I am also pretty sure its not a garbage collection issue, since the code involves absolutely no object allocations after startup. The code consists mainly of some bit manipulation operations (stream decoding) and lots of basic floating math (generating PCM audio). The only JDK classes involved are ByteArrayInputStream (feeds the stream to the test and excluding disk IO from the tests) and CRC32 (to verify the result). I also observed the same behaviour with Sun JDK 1.7.0_b98 (only that ist 15% instead of 12% there). Oh, and the tests were all done on the same machine (single core) with no other applications running (WinXP). While there is some inevitable variation on the measured execution times (using System.nanoTime btw), the variation between different test runs with the same settings never exceeded 2%, usually less than 1% (after warmup), so I conclude the effect is real and not purely induced by the measuring mechanism/machine. Are there any known coding patterns that perform worse on the server JIT? Failing that, what options are available to "peek" under the hood and observe what the JIT is doing there?

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Convert CString to string (VC6)

- by Yan Cheng CHEOK

I want to convert CString to string. (Yup. I know what am I doing. I know the returned string will be incorrect, if CString value range is outside ANSI, but That's Is OK!) The following code will work under VC2008. std::string Utils::CString2String(const CString& cString) { // Convert a TCHAR string to a LPCSTR CT2CA pszConvertedAnsiString (cString); // construct a std::string using the LPCSTR input std::string strStd (pszConvertedAnsiString); return strStd; } But VC6 doesn't have CT2CA macro. How I can make the code to work as well in both VC6 and VC2008?

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Processing CSV File

- by nettguy

I am using Sebastien LorionReference CSV reader to process my CSV file in C# 3.0. Say example id|name|dob (Header) 1|sss|19700101 (data) 2|xx|19700201 (data) My Business Object is class Employee { public string ID {get;set;} public string Name {get;set;} public string Dob {get;set;} } I read the CSV stream and stored it in List<string[]> List<string[]> col = new List<string[]>(); using (CsvReader csv = new CsvReader (new StreamReader("D:\\sample.txt"), true, '|')) { col = csv.ToList(); } How to iterate over the list to get each Employee like foreach (var q in col) { foreach (var r in q) { Employee emp=new Employee(); emp.ID =r[0]; emp.Name=r[1]; emp.Dob=r[2]; } } If i call r[0],r[1],r[2] i am getting "index out of range exception".How the process the list to avoid the error?

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Storing a bucket of numbers in an efficient data structure

- by BlitzKrieg

I have a buckets of numbers e.g. - 1 to 4, 5 to 15, 16 to 21, 22 to 34,.... I have roughly 600,000 such buckets. The range of numbers that fall in each of the bucket varies. I need to store these buckets in a suitable data structure so that the lookups for a number is as fast as possible. So my question is what is the suitable data structure and a sorting mechanism for this type of problem. Thanks in advance

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How Do I create a synchronous version of NSURLConnection

- by quinn

I am using NSURLConnection inside of an NSIncrementalStore to synchronize my NSManagedObject with rest based web service built in Rails. I am aware of +sendSynchronousRequest:returningResponse:error but my understanding is that will not allow me to access such things as the HTTP response status code which I will need to properly handle the response, my understanding is sendSynchronousRequest returns the data if it responds in the 200 range and fails if it doesn't and doesn't really give you much more than that. I'm assuming I will somehow have to block the current method call after the NSURLConnection is instantiated and unblock it after NSURLConnection's delegate sets some value that can be returned by the blocked method. I'm assuming this will involve some combination of NSLock and NSThread but I really don't know where to start with this, any help will be greatly appreciated, thank you.

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Problem while configuring the file Delimeter("\t") in app.config(C#3.0)

- by Newbie

In my app.config file I made the setting like the following <add key = "Delimeter" value ="\t"/> Now while accessing the above from the program by using the below code string delimeter = ConfigurationManager.AppSettings["FileDelimeter"].ToString(); StreamWriter streamWriter = null; streamWriter = new StreamWriter(fs); streamWriter.BaseStream.Seek(0, SeekOrigin.End); Enumerable .Range(0, outData.Length) .ToList().ForEach(i => streamWriter.Write(outData[i].ToString() + delimiter)); streamWriter.WriteLine(); streamWriter.Flush(); I am getting the output as 18804\t20100326\t5.59975381254617\t 18804\t20100326\t1.82599797249479\t But if I directly use "\t" in the delimeter variable I am getting the correct output 18804 20100326 5.59975381254617 18804 20100326 1.82599797249479 I found that while I am specifying the "\t" in the config file, and while reading it into the delimeter variable, it is becoming "\\t" which is the problem. I even tried with but with no luck. I am using C#3.0. Need help

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Is there a list of language only character regions for UTF-8 somewhere?

- by Brehtt

I'm trying to analyze some UTF-8 encoded documents in a way that recognizes different language characters. For my approach to work I need to ignore non-language characters, such as control characters, mathematical symbols etc. Just trying to dissect the basic Latin section of the UTF standard has resulted in multiple regions, with characters like the division symbol being right in the middle of a range of valid Latin characters. Is there a list somewhere that identifies these regions? Or better yet, a Regex that defines the regions or something in C# that can identify the different characters?

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SQL Server 2008 spatial index and CPU utilization with MapGuide Open Source 2.1

- by Antonio de la Peña

I have a SQL Server table with hundreds of thousands of geometry type parcels. I have made indexes on them trying different combinations of density and objects per cell settings. So far I'm settiling for LOW, LOW, MEDIUM, MEDIUM and 16 objects per cell and I made a SP that sets the bounding box according to the extents of the entities in the table. There is an incredible performance boost from queries taking almost minutes without index to less than seconds, it gets faster when the zoom is closer thus less objects are displayed. Yet the CPU utilization gets to 100% when querying for features, even when the queries themselves are fast. I'm worrying this will not fly in a production environment. I am using MapGuide Open Source 2.1 for this project, but I am positive the CPU load is caused by SQL Server. I wonder if my indexes are set properly. I haven't found any clear documentation on how to properly set them up. Every article I've read basically says "it depends..." but nothing specific. Do you have any recommendations for me, including books, articles? Thank you.

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MSSQL 2000 Stored Procedure to Split Shift Times

- by JClaspill

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Store previous search criteria using ASP.NET

- by thatuxguy

I have created a web application which returns a list of products. On this page it allows users to search for a range of different search criteria. Once a user searches and the results are returned to the table on the page a user can then edit a product. However upon returning to the product listing page the page just reloads, and shows all products again. I would like to know what the best way would be to keep the search results, and upon returning to the search page it keeps the previous criteria. I have found a few posts on stack exchange - Best way to store previous search criteria in ASP.NET - is probaly one of the better ones. Does any one know how i could go about keeping the search criteria, so when a user returns to the search page, the previous search criteria and results stay the same. Many thanks.

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Placement of defensive structures in a game

- by Martin

I am working on an AI bot for the game Defcon. The game has cities, with varying populations, and defensive structures with limited range. I'm trying to work out a good algorithm for placing defence towers. Cities with higher populations are more important to defend Losing a defence tower is a blow, so towers should be placed reasonably close together Towers and cities can only be placed on land So, with these three rules, we see that the best kind of placement is towers being placed in a ring around the largest population areas (although I don't want an algorithm just to blindly place a ring around the highest area of population, sometime there might be 2 sets of cities far apart, in which case the algorithm should make 2 circles, each one half my total towers). I'm wondering what kind of algorithms might be used for determining placement of towers?

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How to determine pixel color of System.Windows.Controls.Image?

- by csciguy

I have an Image from (System.Windows.Controls.Image). This image is positioned on a main canvas. I want to determine the alpha channel value of the mouse cursor when I click on any portion of this image. When doing something like the following, I'm getting an exception. {"Value does not fall within the expected range."} System.Exception {System.ArgumentException} Code: try{ CroppedBitmap cb = new CroppedBitmap(ac.displayImage.Source as BitmapSource, new Int32Rect((int)mousePoint.X, (int)mousePoint.Y, 1, 1)); byte[] pixels = new byte[4]; cb.CopyPixels(pixels, 4, 0); } catch (Exception ex) { System.Diagnostics.Debug.WriteLine(ex.Message); } The mousePoint.X, and mousePoint.Y are obtained when the user clicks on the main window. Is there a better way to do this?

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python multiprocess update dictionary synchronously

- by user1050325

I am trying to update one common dictionary through multiple processes. Could you please help me find out what is the problem with this code? I get the following output: inside function {1: 1, 2: -1} comes here inside function {1: 0, 2: 2} comes here {1: 0, 2: -1} Thanks. from multiprocessing import Lock, Process, Manager l= Lock() def computeCopyNum(test,val): l.acquire() test[val]=val print "inside function" print test l.release() return a=dict({1: 0, 2: -1}) procs=list() for i in range(1,3): p = Process(target=computeCopyNum, args=(a,i)) procs.append(p) p.start() for p in procs: p.join() print "comes here" print a

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Rails advanced queries with join and sum calculation

- by Dustin Brewer

I have two models: companies and expenses. Companies have many expenses and expenses belong to companies. My expense model has an 'amount' column. I was wondering if there is a way to perform a find based on a date range and the amount column of the expenses. Something like top 3 companies by total expense amounts over a 7 day period. I've tried for the better part of the day to get this to work, I've attempted joins, chaining named scopes, raw sql, etc. and I'm not having any luck. Thanks for the help.

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Parse string to create a list of element

- by Nick

I have a string like this: "\r color=\"red\" name=\"Jon\" \t\n depth=\"8.26\" " And I want to parse this string and create a std::list of this object: class data { std::string name; std::string value; }; Where for example: name = color value = red What is the fastest way? I can use boost. EDIT: This is what i've tried: vector<string> tokens; split(tokens, str, is_any_of(" \t\f\v\n\r")); if(tokens.size() > 1) { list<data> attr; for_each(tokens.begin(), tokens.end(), [&attr](const string& token) { if(token.empty() || !contains(token, "=")) return; vector<string> tokens; split(tokens, token, is_any_of("=")); erase_all(tokens[1], "\""); attr.push_back(data(tokens[0], tokens[1])); } ); } But it does not work if there are spaces inside " ": like color="red 1".

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Google app engine error when I login.

- by zjm1126

i am using http://code.google.com/p/gaema/source/browse/#hg/demos/webapp, and this is my traceback: Traceback (most recent call last): File "D:\Program Files\Google\google_appengine\google\appengine\ext\webapp\__init__.py", line 510, in __call__ handler.get(*groups) File "D:\gaema\demos\webapp\main.py", line 31, in get google_auth.get_authenticated_user(self._on_auth) File "D:\gaema\demos\webapp\gaema\auth.py", line 641, in get_authenticated_user OpenIdMixin.get_authenticated_user(self, callback) File "D:\gaema\demos\webapp\gaema\auth.py", line 83, in get_authenticated_user url = self._OPENID_ENDPOINT + "?" + urllib.urlencode(args) File "D:\Python25\lib\urllib.py", line 1250, in urlencode v = quote_plus(str(v)) UnicodeEncodeError: 'ascii' codec can't encode characters in position 0-1: ordinal not in range(128) how to do this thanks updated i change the code from args = dict((k, v[-1]) for k, v in self.request.arguments.iteritems()) args["openid.mode"] = u"check_authentication" url = self._OPENID_ENDPOINT + "?" + urllib.urlencode(args) to args = dict((k, v[-1].encode('utf-8')) for k, v in self.request.arguments.iteritems()) args["openid.mode"] = u"check_authentication" url = self._OPENID_ENDPOINT + "?" + urllib.urlencode(args) but also error.

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ANTLR lexing getting confused over '...' and floats

- by Andy Hull

I think the ANTLR lexer is treating my attempt at a range expression "1...3" as a float. The expression "x={1..3}" is coming out of the lexer as "x={.3}" when I used the following token definitions: FLOAT : ('0'..'9')+ ('.' '0'..'9'+)? EXPONENT? | ('.' '0'..'9')+ EXPONENT? ; AUTO : '...'; When I change FLOAT to just check for integers, as so: FLOAT : ('0'..'9')+; then the expression "x={1...3}" is tokenized correctly. Can anyone help me to fix this? Thanks!

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Cross-Platform Camera API

- by Karim

Hi, I'm now building a video transforming filter that have to transform video frames in real-time. One of the key requirements of the filter is to have high performance to minimize the number of dropped frames during the transform. Another requirement that is of lower priority but also nice to have is to make it cross-platform (both PC's and Mobile devices). The application is built in C++. Now my question is: is there any API that is more portable and has a similar or better performance characteristics than DirectShow? as DirectShow's portability is only limited to Windows-based devices (PCs and Windows Mobile&CE platforms). Also I've notices that for example using HTC's custom camera API has far better performance than what DirectShow offers. If you want to check this, try to build a filter in DirectShow that will multiply each color by 2 and render that in real-time from camera on the screen. Then do the same with HTC's API. There is almost 4-5x performance boost with vendor's specific API. So it'd be very nice if the library used the device-specific implementation of the driver, as performance is critical when doing this transforms on a mobile device (which is about ~500 MHz).

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Masking to Transparent returns empty image

- by Tibi

Hi there, I'm trying to put white color in my images to transparent with the following code. Problem is that "CGImageRef maskedTransparent" is blank. I don't understand because the code I'm using is nearly a copy paste from the doc ... Any idea ? (UIImage*) maskImage:(UIImage *)image withMask:(UIImage *)maskImage { CGImageRef maskRef = maskImage.CGImage; CGImageRef mask = CGImageMaskCreate(CGImageGetWidth(maskRef), CGImageGetHeight(maskRef), CGImageGetBitsPerComponent(maskRef), CGImageGetBitsPerPixel(maskRef), CGImageGetBytesPerRow(maskRef), CGImageGetDataProvider(maskRef), NULL, false); CGImageRef masked = CGImageCreateWithMask([image CGImage], mask); //Array defining min & max RGB values to be transformed to transparent colors. float maskingMinMax[6] = {255, 255, 255, 255, 255, 255}; //masking image to remove range in maskinLinMax CGImageRef maskedTransparent = CGImageCreateWithMaskingColors(masked, maskingMinMax); return [UIImage imageWithCGImage:maskedTransparent]; }

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- by maddy

- by moodforaday

- by blid..pl

- by aboved

- by blueomega

- by leen3o

- by durandai

- by Yan Cheng CHEOK

- by nettguy

- by BlitzKrieg

- by quinn

- by Newbie

- by Brehtt

- by Antonio de la Peña

- by JClaspill

- by thatuxguy

- by Martin

- by csciguy

- by user1050325

- by Dustin Brewer

- by Nick

- by zjm1126

- by Andy Hull

- by Karim

- by Tibi

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