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• In PHP, imagepng() accepts a filter parameter. How do these filters affect the function's output?

  - by Joe Lencioni

  How do these filters affect the output of imagepng() in PHP? PNG_NO_FILTER PNG_FILTER_NONE PNG_FILTER_SUB PNG_FILTER_UP PNG_FILTER_AVG PNG_FILTER_PAETH PNG_ALL_FILTERS The documentation simply says, "A special PNG filter, used by the imagepng() function" for each of them. It seems that using PNG_NO_FILTER will reduce the filesize of the output, but other than that, I am unsure as to how it is affected. Any insight would be really appreciated.

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• Why is the order of evaluation for function parameters undefined in c++?

  - by kunj2aan

  The standard doesn't specify the order of evaluation of arguments with this line: The order of evaluation of arguments is unspecified. What does Better code can be generated in the absence of restrictions on expression evaluation order imply? What is the drawback in asking all the compilers to evaluate the function arguments Left to Right for example? What kinds of optimizations do compilers perform because of this undefined spec?

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• How to use c library function fgets in assembly language?

  - by Summer_More_More_Tea

  Hi, everyone: As the title described, how to use c library function fgets in assembly language? Indeed, I want to know how to get the file pointer to stdin. Thanks for your reply.

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• built in function to combine overlapping string sequences in php?

  - by Jamex

  is there a built in function in php that would combine 2 strings into 1? example: $string1 = abcde, $tring2 = cdefg combine to get: abcdefg if the exact overlapping sequence and the position are known, then it is possible to write a code to merge them. TIA

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• How do I create and read non-global variables that aren't destroyed at end of function?

  - by Paul Reilly

  I am attempting to code some plugins to use with MIDI sequencers but have hit a stumbling block. I can't use global-scope variables to store information because multiple instances of the .dll can exist which share memory. How do I create a class (for re-usability purposes in other plugins) containing 2 dimensional array and other variables the content of which is to be shared between functions? If that is possible, how would I read and write the data from the function in the framework where I do the processing?

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• Is there something like the PHP function nl2br() for ASP.NET MVC?

  - by myotherme

  Is there stock standard function that does newline to <br /> encoding in ASP.Net MVC?

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• What is simpliest C# function to parse Json String into object?

  - by Ole Jak

  What is simpliest C# function to parse Json String into object and display it (C# xaml WPF)? (for example object wit 2 arrays - arrA and arrB)

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• Standard library function in R for finding the mode?

  - by Nick

  In statistical language R, mean() and median() are standard functions which do what you'd expect. mode() tells you the internal storage mode of the R object, not the value that occurs the most in its argument. But surely there is a standard library function that implements mode for a vector (or list).

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• Why calling a user defined function needs the owner name when calling a stored procedure doesn't ?

  - by Nam Gi VU

  Why calling a user defined function need the owner name when calling a stored procedure doesn't ? Please help!

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• speed of map() vs. list comprehension vs. numpy vectorized function in python

  - by mcstrother

  I have a function foo(i) that takes an integer and takes a significant amount of time to execute. Will there be a significant performance difference between any of the following ways of initializing 'a': a = [foo(i) for i in xrange(100)] , a = map(foo, range(100)) , and vfoo = numpy.vectorize(foo) vfoo(range(100)) ? (I don't care whether the output is a list or a numpy array). Is there some other better way of doing this? Thanks.

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• How to call a javascript function of parent window when child is closed?

  - by biluriuday

  Hello All, I am creating a pop up window. After I am finished with the work on child(pop up) window and click close button, i need to call a javascript function of the parent window. How can I achieve this. I am not creating the child window myself but displaying the contents of some other url.

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• how to invoke a function written in one user control from another user control?

  - by aparnakarthik

  I have two user controls I have some functions written on those two controls. Is it possible to invoke a function written on one user control from another user control. Pls provide the code for this.

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• call a python function in another class from a class?

  - by user3527697

  hi i'am begginer in pYthon and openerp , i want to call a function exists in another class for example: i have 2 class : class a: def notif_personne_event(self, cr, uid,ids,context=None): and import a class b: notifier(self, cr, uid,ids,context=None): self.notifiernotif_personne_event() but when i do this an error is displayed telling me that class b have not an attribute notifiernotif_personne_event() someone help me please

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• Problem with C function of type char pointer, can someone explain?

  - by JJ

  Find the errors from following C function : char* f(int i) { int i; char buffer[20]; switch ( i ) { 1: strcpy( buffer, "string1"); 2: strcpy( buffer, "string2"); 3: strcpy( buffer, "string3"); default: strcpy(buffer, "defaultstring"); } return buffer; } this is c funtion not C++, I think it has to do with type conversion my compiler give warning that declaration of int i shadows a parameter.

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• How many additional function calls does fib(n) require if "LINE 3" is removed?

  - by BROCK

  I just got this question on a interview and had no idea how to calculate the answer. How many additional function calls does fib(n) require if "LINE 3" is removed? The answer should be in terms on n. int fib(int n) { if(n == 0) return 0; if(n == 1) return 1; if(n == 2) return 1; //LINE 3 HERE <--- return fib(n - 1) + fib(n - 2); }

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• 1-which is the parameter that is added to every non-static member function when it is called?

  - by user308387

  1-which is the parameter that is added to every non-static member function when it is called? 2-what is an adaptor class or wrapper class? 3-what is a non object when can you tell that a memory leak will occur? 4-what is a parameterized type?

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• Is there any char to hexadecimal function for C ?

  - by ge0rge007

  I have a char array with data from a text file and I need to convert it to hexadecimal format. Is there such a function for C language. Thank you in advance!

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• Possible to add an EventListener to a function for Actionscript 3?

  - by Tom

  I'm trying to setup something like Aspect Oriented Programming in Actionscript 3, basically the only thing I need to be able to do is something like this: SomeClass.getMethod("methodName").addEventListener(afterMethodExecuted, function() { //run code }); This way I can run code after (or before) any method in any class has run, allowing numerous new possibilities. How should I implement this?

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• Is it possible to specify a function with both extern and override modifiers?

  - by Jeffrey Greenham

  I'm trying to override the behavior of an external function in user32.dll because I don't want a certain window to show up. What I'm trying to do is this: [DllImport("user32.dll")] public extern override IntPtr GetSystemMenu(IntPtr hMenu, bool bRevert) { return new IntPtr(); } but this won't work because I get the following errors: ... no suitable method found to override and ... cannot be extern and declare a body Is there any way to simulate what I'm trying to do?

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• Where can I find documentation for Scala's delayed function calls?

  - by Geo

  I saw a delayed example in David Pollak's "Beginning Scala". I tried to adapt that, by trial and error. Here's what I have: def sayhello() = { println("hello") } def delaying(t: => Unit):Unit = { println("before call") t println("after call") } delaying(sayhello()) How would you delay a function/method that takes parameters? Why can't I use parantheses when I call t? Where can I find more documentation on delaying functions?

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• Possible to have an NSIS callback function after all files were copied?

  - by Uwe Keim

  Trying to optimize my MUI 2 NSIS setup in which I do some ExecWait calls in the .onInstSuccess callback function, I was searching through the documentation to find a callback that is called: after the files are all copied -and- before the wizard page is being switched from the file copy page to the finish page. Unfortunately, I found no such callback. Therefore my question is: Is it possible to do some custom processing after the files are copied and before the wizard page is being switched away from the file copy page?

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• how to return NULL for double function with Intel C compiler?

  - by Derek

  I have some code that I am porting from an SGI system using the MIPS compiler. It has functions that are declared to have double return type. If the function can't find the right double, those functions return "NULL" The intel C compiler does not like this, but I was trying to see if there is a compiler option to enable this "feature" so that I can compile without changing code. I checked the man page, and can't seem to find it. Thanks

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• Why does this anonymous function starting with println result in a NullPointerException?

  - by noahz

  I am learning about pmap and wrote the following function: (pmap #((println "hello from " (-> (Thread/currentThread) .getName)) (+ %1 %2)) [1 1 1] [-1 -1 -1]) When run, the result is a NullPointerException (hello from clojure-agent-send-off-pool-4 hello from clojure-agent-send-off-pool-3 hello from clojure-agent-send-off-pool-5 NullPointerException user/eval55/fn--56 (NO_SOURCE_FILE:11) Why is this happening? I have understood and observed the body of a fn to be an implicit do.

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• How do I assign an alias to a function name in C++?

  - by Vulcan Eager

  It's easy to create a new name for a type, a variable or a namespace. But how do I assign a new name to a function? For example, I want to use the name holler for printf. #define is obvious... any other way? Solutions: #define holler printf ...

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• How to add a cross-browser mouse wheel function to a div in javascript?

  - by Shaunwithanau

  I am trying to stop the default mouse wheel event that is called on the window and on a div and call my own function instead on the div. I need this to be cross-browser (without the use of a library. I know I need to use an eventListener and I think have to use both onmousewheel and DOMMouseScroll (for FF) but I think am getting caught up in the implementation somewhere. I appreciate any and all help.

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