Search Results

Search found 9495 results on 380 pages for 'double pointer'.

Page 254/380 | < Previous Page | 250 251 252 253 254 255 256 257 258 259 260 261  | Next Page >

• doubt in sizeof implementation

  - by aks

  Below is the program to find the size of a structure without using sizeof operator: struct MyStruct { int i; int j; }; int main() { struct MyStruct *p=0; int size = ((char*)(p+1))-((char*)p); printf("\nSIZE : [%d]\nSIZE : [%d]\n", size); return 0; } My doubt is: Why is typecasting to char * required? If I don't use the char* pointer, the output is 1 - WHY?

  Read the article

• Problem with array of elements of a structure type

  - by kobac

  I'm writing an app in Visual Studio C++ and I have problem with assigning values to the elements of the array, which is array of elements of structure type. Compiler is reporting syntax error for the assigning part of the code. Is it possible in anyway to assign elements of array which are of structure type? typedef struct { CString x; double y; } Point; Point p[3]; p[0] = {"first", 10.0}; p[1] = {"second", 20.0}; p[2] = {"third", 30.0};

  Read the article

• Tracking EXC_BAD_ACCESS on iPad

  - by Aleks

  I've been using this code to create my UIWindow UIMyWindow* win = [[UIMyWindow alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]]; UIMyWindow isn't anything special it just has a pointer to a C++ class that does some wrapping of ObjectiveC. Recently my application start crashing after adding some line of code that doesn't have to do anything with the error. The line of code that I added is just allocating a C++ object but the program execution never reaches this line. Interesting enough my code works in Release. My only guess is that I made some memory corruption on a completely different place. My questions are: What type of memory corruption that can be? And is there some good practices to track them down?

  Read the article

• Assigning a view controller to be the delegate of a subview which is not directly descendent?

  - by ambertch

  I am writing an iphone app where in numerous cases a subview needs to talk to its superview. For example: View A has a table view that contains photos A has a subview B which allows users to add photos, upon which I want to auto append them to A's table view So far I have been creating a @protocol in B, and registering A as the delegate. The problem in my case is that B has a subview C that allows users to add content, and I want actions in C to invoke changes in its grandparent, A. Currently I am working around this by passing around a self pointer to my base view controller (C.delegate = B.delegate), but it doesn't seem very proper to me. Any thoughts? (and/or general advice on code organization when all sort of subviews needs to talk to superviews would be greatly appreciated) Thanks!

  Read the article

• How can I create a collection of references in C#

  - by Jonathan Kaufman

  Ok I am having a cross language hiccup. In C# with it's great collections like List and I have: a Map class with properties of: List<byte[]> Images; List<Tile> Tiles; a Tile Class of: byte[] ImageData; int X; int Y; Now I want to add an image to the Map class and have the ImageData property of the Tile Classes to "reference" it. I have discovered I can't just assign it Images[0]. You can't have a reference to an object of a List. My fix was to create a Dictionary. Is this the best way or can I somehow have a "pointer" to a collection of objects?

  Read the article

• regex and javascript, some matches disappear !

  - by dader51

  Here is the code : > var reg = new RegExp(" hel.lo ", 'g'); > > var str = " helalo helblo helclo heldlo "; > > var mat = str.match(reg); > > alert(mat); It alerts "helalo, helclo", but i expect it to be "helalo, helblo, helclo, heldlo" . Only the half of them matches, I guess that's because of the space wich count only once. So I tried to double every space before processing, but in some case it's not enough. I'm looking for an explanation, and a solution. Thx

  Read the article

• Invalid Token when using XPath

  - by Andy5

  Hi I am making a modification to a web application using XPath, and when executed I get an error message - Invalid token! This is basic what I am doing public xmlNode GetSelection (SelectParams params, xmldocument docment) { xpathstring = string.format("Name =\'{0}' Displaytag = \'{1}' Manadatory=\'{2}', params.Name, params.Displaytag, params.Manadatory); return document.selectsinglenode(xpathstring); } As you can see, I am making a string and setting values on the nodes I am trying to find against my xml document, and thus returning xml data that matches my parameters. What is happening is that I am getting an xpathexeception error in Visual Studio and it says invalid token. I do know that in the xml document that the parameters I am looking in the tags have double quotes, for example, Name="ABC". So, I thought the problem could be solved using an "\". Can anyone help? Update from comments In the Xml Document, the tag has attributes where they are set as Name="ABC" Displaytag="ATag" Manadatory="true".

  Read the article

• Unescpaing huge single-line string on Linux

  - by Lajos Nagy

  I ended up with a huge, single line string literal (don't ask me how) where everything is escaped (mostly), including new lines and double quotes. Problem is, I want the original string. The string is huge so I'm not even sure how to begin. Here's what I have: "This\n is \"nice\",\nain\'t it?" This is what I want: This is "nice", ain't it? Again, the problem is that other shell sensitive stuff is not escaped (like $, or !), and that the string is couple of megabytes.

  Read the article

• Is this casting safe?

  - by Itsik

  I need to write a Util function (in my c++cli app) that converts a String to a Double or Float or Int. template<typename T> static T MyConvert(String^ str) { return static_cast<T>(System::Convert::ToDouble(str)); } Is this safe? Can it somehow convert 2 to 1.999 and then to 1 if I call MyConvert<int>("2") ? I was wondering why the Convert class isn't templated in the first place? (That would let me call Convert<T> instead of Convert.ToDouble() for all types) This is C++/Cli so I can use any convert methods in c++ or .net, but I only know Convert.ToDouble()|ToString()|ToInt32()) Thanks

  Read the article

• Fermat factorization method limit

  - by Fakrudeen

  I am trying to implement Fermat's factorization [Algorithm C in Art of computer programming Vol. 2]. Unfortunately in my edition [ISBN 81-7758-335-2], this algorithm is printed incorrectly. what should be the condition on factor-inner loop below? I am running the loop till y <= n [passed in as limit]. (if (< limit y) 0 (factor-inner x (+ y 2) (- r y) limit)) Is there anyway to avoid this condition altogether, as it will double the speed of loop? (define (factor n) (let ( ( square-root (inexact->exact (floor (sqrt n))) ) ) (factor-inner (+ (* 2 square-root) 1) 1 (- (* square-root square-root) n) n) ) ) (define (factor-inner x y r limit) (if (= r 0) (/ (- x y) 2) (begin (display x)(display " ")(display y)(display " ")(display r)(newline) ;(sleep-current-thread 1) (if (< r 0) (factor-inner (+ x 2) y (+ r x) limit) (if (< limit y) 0 (factor-inner x (+ y 2) (- r y) limit)) ) ) ) )

  Read the article

• What languages allow cross-platform native executables to be created?

  - by JT

  I'm frustrated to discover that Java lacks an acceptable solution for creating programs that will run via double-click. Other than .NET for Windows, what modern and high-level programming languages can I write code in that can be compiled for various platforms and run as a native/binary in each (Windows, Linux, OSX (optional)) Assuming I wanted to write code in python, for instance, is there a cohesive way that I could distribute my software which wouldn't require users to do anything special to get it to run? I want to write and distribute software for computer-illiterate and Java has turned out to be a real pain in this respect.

  Read the article

• Application with both console and gui mode

  - by mridang

  Hi, I have a python console app. Like most python console apps it uses the OptionParser module to take arguments. I've now developed a GUI for my app using wxPython and i'd like to integrate the two. I'd like my app to be run both from the console and from the OS's UI. When it is invoked from the console it runs as a console app and when it is double clicked in the OS's UI, it runs as a GUI app. How could I do something like this? Could someone show me a a snippet of what the __main__ block should be like? Thanks a ton.

  Read the article

• Newlines not being interpreted when passed to php via the command line

  - by CarbonX

  I have a PHP script that I'm invoking from another shell script that sends an automated email with a message generated from the shell script. Problem is, when I send the message all the newline characters are printed into the message. How do I get them to be interpreted? sendmail.sh: /path/to/phpscript/sendmail.php "Some Message With Newlines\nHello World.\n" sendmail.php: $message = $argv[1] . "\nNewline"; $smtp->send($to, $from, $message); The odd thing is the \n after the $argv variable is interpreted and actually prints Newline on a new line, but the newlines in the $argv variable don't, I have tried wrapping the variable in double quotes among other things but so far to no avail.

  Read the article

• How to debug macruby?

  - by Dan

  Hi, I've encountered an inconsistent bug with MacRuby and have no idea how to go about debugging this. If anyone could help would be great. I don't know if this is due to my own code or is it a bug in the MacRuby framework. I have a feeling it's my own code, something about over-retaining a piece of memory and hence the garbage collection failed. This is the error from Xcode. Thanks. CSV Wizard(30245,0x7fff704f7ca0) malloc: resurrection error for object 0x20199da20 while assigning {conservative-block}[196608](0x302360060)[117616] = Array[64](0x20199da20) garbage pointer stored into reachable memory, break on auto_zone_resurrection_error to debug CSV Wizard(30245,0x103781000) malloc: garbage block 0x20199da20(Array[64]) was over-retained during finalization, refcount = 1 This could be an unbalanced CFRetain(), or CFRetain() balanced with -release. Break on auto_zone_resurrection_error() to debug. CSV Wizard(30245,0x103781000) malloc: fatal resurrection error for garbage block 0x20199da20(Array[64]): over-retained during finalization, refcount = 1

  Read the article

• Having an @ inside of a string - PHP

  - by Msencenb

  So I know that you use a backslash to escape most things in php however the @ symbol is an operator that suppresses error messages. I'm trying to put an email string like this inside of an array "[email protected]", however php is throwing an error. How do you escape the @ sign? EDIT: Here is the code example that was throwing the error: $arr = array(3=> "[email protected]",4=> "[email protected]"); However replacing the double quotes with single quotes fixes the error as answered below.... why is that true?

  Read the article

• Gruber URL Regex tweak to capture "domain.com"

  - by mootymoots

  I found an updated version of John Gruber's regex for url matching in this post by user GianPac, which states it's been adapted to recognize url without protocol or the www part: (?i)\b((?:[a-z][\w-]+:(?:/{1,3}|[a-z0-9%])|www\d{0,3}[.]|[a-z0-9.-]+[.][a-z]{2,4}/?)(?:[^\s()<]+|(([^\s()<]+|(([^\s()<]+)))))(?:(([^\s()<]+|(([^\s()<]+))))|[^\s`!()[]{};:'\".,<?«»“”‘’])) Whilst this works in most cases, I found it does not match "google.com". It does match "google.comm" and "google.co.uk", so this must be a small oversight. The trouble is, I literally hate regex. It's the bane of my life. I just want to try and tweak this one more time to allow for "google.com" - can anyone throw me a pointer? I (think) it's something to do with this part of the code: +[.][a-z]{2,4}/?) ?

  Read the article

• Same code... but warning!Any ideas?

  - by FILIaS

  I've a question for a warning message that i get. For this line,using qsort: qsort(catalog, MAX ,sizeof catalog, struct_cmp_by_amount); I get this warning: warning: passing argument 4 of ‘qsort’ makes pointer from integer without a cast struct_cmp_by_amount is another function on the program. BUT,for another program with the same code, with the same exactly struct_cmp_by_amount function, i dont get that warning for the 4th argument! qsort(structs, structs_len, sizeof(struct st_ex), struct_cmp_by_price); I'm wandering about why that;s happening. Have you any idea?

  Read the article

• Launching browser within CherryPy

  - by Alan Harris-Reid

  I have a html page displayed using... cherrypy.quickstart(ShowHTML(htmlfile), config=configfile) Once the page is loaded (eg. initiated via. the command 'python mypage.py'), I would like to automatically launch the browser to display the page (eg. via. http://localhost/8000). Is there any way I can achieve this (eg. via. a hook within CherryPy), or do I have to call-up the browser manually (eg. by double-clicking an icon)? TIA Alan

  Read the article

• Ways to divide the high/low byte from a 16bit address?

  - by Grissiom

  Hello, I'm developing a software on 8051 processor. A frequent job is to divide the high and low byte of a 16bit address. I want to see there are how many ways to achieve it. The ways I come up so far are: (say ptr is a 16bit pointer, and int is 16bit int) ADDH = (unsigned int) ptr >> 8; ADDL = (unsigned int) ptr & 0x00FF; and ADDH = ((unsigned char *)&ptr)[0]; ADDL = ((unsigned char *)&ptr)[1]; Does anyone have any other bright ideas? ;) And anyone can tell me which way is more efficient?

  Read the article

• C inline assembly of x96 fbstp instruction

  - by David HUnter

  Was wondering how to inline a usage of fbstp on a 32 bit I86 architecture. I tried something like int main( ) { double foo = 100.0; long bar = 0; asm( "pushl %1; fbstp %0" : "=m"(bar) : "r"(foo) ); ... But bar is unchanged. I have tried reading everything I can find on this but most example simply do things like add two integers together. I can’t find any that talk about pushing operands onto the stack and what I should be doing when an instruction like fbstp writes 80 bits of data back to memory ( i.e. what C type to use ) and how to specify it in the asm syntax. Also on x86-64 there seems to be a pushq and no pushl but fbstp still exists whereas fbstq does not. Is there some other magic for 64 bit.

  Read the article

• Passing parameters to Javascript using PHP

  - by ayush

  I have the following line of code: <a href="javascript:;" onClick="tweeet('myid')">My Tweets!</a> Now while this is working perfectly fine the following line is not: <a href="javascript:;" onClick="tweeet(<?php echo 'myid'; ?>)">My Tweets!</a> Can anyone help me out why it is not working and suggest any changes? The variable I want to pass to the Javascript function is a PHP variable. I have tried the PHP with single quotes and double quotes but it is not working.

  Read the article

• Escape doube and single backslashes in a string in Ruby

  - by Nick Gorbikoff

  Hello. I'm trying to access a network path in my ruby script on a windows platform in a format like this. \\servername\some windows share\folder 1\folder2\ Now If I try to use this as a path, it won't work. Single backslashes are not properly escaped for this script. path = "\\servername\some windows share\folder 1\folder2\" d = Dir.new(path) I tried everything I could think of to properly escape slashes in the path. However I can't escape that single backslash - because of it's special meaning. I tried single quotes, double quotes, escaping backslash itself, using alternate quotes such as %Q{} or %q{}, using ascii to char conversion. Nothing works in a sense that I'm not doing it right. :-) Right now the temp solution is to Map a network drive N:\ pointing to that path and access it that way, but that not a solution. Does anyone have any idea how to properly escape single backslashes? Thank you

  Read the article

• general things developer must know having 2+ years of exp?

  - by Salil

  Hi All, I have 2 years of experience in Ruby on Rails. I have basic knowledge (Very Basic) of mysql such as data insertion, join, select from more than one table. But now i want to know more about it cause my friends are having trouble in interview when ask questions like 1] What is the trigger. 2] which trigger call when 3] what's views in mysql? etc....... are this questions for developers?is it basic database? Also what other things developer should know having experience of 2 years or more. I am in double mind as i have over two years of exp. in ruby and i am learning new thing everyday in ruby only. if someone ask me to rate yourself i can't give more than 5 out of 10 in ROR only. So my question is What are the general things developer must know having 2+ years of exp? Regards, Salil Gaikwad

  Read the article

• Direct comparator in Java out of the box

  - by KARASZI István

  I have a method which needs a Comparator for one of its parameters. I would like to pass a Comparator which does a normal comparison and a reverse comparator which does in reverse. java.util.Collections provides a reverseOrder() this is good for the reverse comparison, but I could not find any normal Comparator. The only solution what came into my mind is Collections.reverseOrder(Collections.reverseOrder()). but I don't like it because the double method calling inside. Of course I could write a NormalComparator like this: public class NormalComparator<T extends Comparable> implements Comparator<T> { public int compare(T o1, T o2) { return o1.compareTo(o2); } } But I'm really surprised that Java doesn't have a solution for this out of the box.

  Read the article

• Possible to use Tables of same type in Linq to SQL?

  - by Schneider

  Lets say I've got an object model, where I have many collections of the same type. For example something like class StockMarketData { List<SummaryData> WeeklySummary; List<SummaryData> MonthlySummary; } class SummaryData { DateTime DateTime {get; set;} double Value {get; set;} } Those lists will map onto database tables. If you actually use L2S to generate a model from the database you will get something like: class StockMarketData { List<WeeklySummaryData> WeeklySummary; List<MonthlySummaryData> MonthlySummary; } Even though WeeklySummaryData and MonthlySummaryData have the same shape. Is it possible for Linq to SQL to create tables from a database of summary data, but get each table to contain the same type (such as shown in the top example).

  Read the article

< Previous Page | 250 251 252 253 254 255 256 257 258 259 260 261  | Next Page >