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• How can I retrieve the instance of an attribute's associated object?

  - by Brandon Linton

  I'm writing a PropertiesMustMatch validation attribute that can take a string property name as a parameter. I'd like it to find the corresponding property by name on that object and do a basic equality comparison. What's the best way to access this through reflection? Also, I checked out the Validation application block in the Enterprise Library and decided its PropertyComparisonValidator was way too intense for what we need.

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• How do you parse the onError arguments passed to the handler function?

  - by codeninja

  from some reason only m (Message) is only ever defined when I set ... handler:function(m,u,l){ var argstr = "[ "+l+"] \n[ "+m+"] \n["+u+"]"; alert("Other Error > "+argstr); }, ... onerrror = obj.hanlder; Not sure why. This is in firefox...

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• One-liner javascript to collect values from object graph?

  - by Kevin Pauli

  Given the following object graph: { "children": [ { "child": { "pets": [ { "pet": { "name": "fido" } }, { "pet": { "name": "fluffy" } } ] } }, { "child": { "pets": [ { "pet": { "name": "spike" } } ] } } ] } What would be a nice one-liner (or two) to collect the names of my grandchildren's pets? The result should be ["fido", "fluffy", "spike"] I don't want to write custom methods for this... I'm looking for something like the way jQuery works in selecting dom nodes, where you can just give it a CSS-like path and it collects them up for you. I would expect the expression path to look something like "children child pets pet name"

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• Is there an easy (idiomatic) way to convert a java.lang.reflect.Method to a Scala Function Value?

  - by Alex R

  Can I retrieve a Method via reflection, somehow combine it with a target object, and pass it around as a first-class Scala function value? The argument list is variable.

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• Can one construct a "good" hash function using CRC32C as a base.

  - by DavidD

  Given that SSE 4.2 (Intel Core i7 & i5 parts) includes a CRC32 instruction, it seems reasonable to investigate whether one could build a faster general-purpose hash function. According to this only 16 bits of a CRC32 are evenly distributed. So what other transformation would one apply to overcome that? David

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• Most inappropriate function or variable names you have encountered?

  - by Andrioid

  I was reading through my daily doze of RSS when I noticed a link to the python compiler documentation where class names like assList, assName and assTuple exist. While starting names with 'ass' is perfectly acceptable to me, it just sparked this idea that there probably exist much better examples of this. Have you personally used or otherwise encountered any inappropriate function or variable names? Personally I have used 'crap' and 'moo' for temporary purposes, forgot them and at a later point they came too integrated for me to bother with fixing them.

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• what is the equivalent of object in C# for objective C?

  - by Wayne Lo

  In c# I can declare object o; then I can assign o=(float)5.0; or o="a string." Is there an equivalent for Objective-C? I tried to use id but it does not take primitive type like float or integer. Thanks for helping.

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• How to alter the Browser's Refresh Event and trigger a custom function?

  - by Starx

  As you all know, when we hit the refresh button, the entire page starts to reload. But I dont that, I only want to refresh some portions, which need to be refresh in case of a need. I know, I can use ajax to reload a piece of content. But I want to attach this ajax function while the user clicks the refresh button or presses F5 or presses Ctrl+F5.

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• How to get the absolute path of the calling file in a function that's called in PHP?

  - by user198729

  in file.php: call()... How to get absolute path of file.php inside call() ? Pay attention that call() may be defined in another file. another.php: function call(){..} file.php: include(path_to_another.php); call();

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• How does the garbage collector determine whether an object is garbage?

  - by n0vic3c0d3r

  How does the garbage collector determine whether an object is garbage? Does it refer to the stack to check the references to the space allocated in the heap?

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• What is the simplest way (or simplest library) to create a truly secure php mail() function?

  - by Tchalvak

  The mail() function is bad, because it is so permissive with headers that you pretty much can't use it with any user input without subjecting yourself or others to spam. So what is the simplest substitute that can still ensure that it's use is secure? Ideally something that can be included in an external file.

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• How to compile a C project with more than one main function?

  - by Daziplqa

  Hi folks, I am new to C, and now read some textbook and going to apply its examples. The problem is, whenever I creates a new project and try to put more than one file that contains a main function, the linker (as I thougt0 explains saying: /home/mohammed/tmp/abcd/main.c:4: multiple definition of `main' (BTW, I used many IDEs, MonoDevelop, QT creator, VS2010, Codebloks, ...) I am currently uses QT Creator, It seems to be a very nice IDE. So, there's not a workaround to solve such problem??

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• Stored procedure with output parameters vs. table-valued function?

  - by abatishchev

  Which approach is better to use if I need a member (sp or func) returning 2 parameters: CREATE PROCEDURE Test @in INT, @outID INT OUT, @amount DECIMAL OUT AS BEGIN ... END or CREATE FUNCTION Test ( @in INT ) RETURNS @ret TABLE (outID INT, amount DECIMAL) AS BEGIN ... END What are pros and cons of each approach considering that the result will passed to another stored procedure: EXEC Foobar @outID, @outAmount

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• How do i get ServletContext object in a simple class file?

  - by Nitesh Panchal

  Hello, I am creating a simple web application. I need to get reference to ServletContext object in that class. How can i get it?

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• Can schema be ignored in object names in VS 2010 Schema Compare?

  - by Daniel

  Is it possible to ignore the schema in object names when comparing databases using Visual Studio 2010 Schema Compare? For example, I'd like [dbo].[mysproc] and [mysproc] to be considered equivalent.

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• How to get the measures of an object from far away?

  - by Luis Armando

  I am working on an App that intends to give an accurate measure of any object (building, desk, chair, people, etc.) Using the camera (either phone's or laptop) but I'm unsure as to how to do this without using a lot of resources, would someone mind giving me some options? I'm looking for a lightweight one that can be quickly processed by the computer/phone to give back the measures.

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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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• Is there a random sampling function for iphone development that can simulate a coin toss?

  - by William

  Is there a random sampling function for the iphone? For example, if you want to flip a coin that returns heads 25% of the times it's flipped, and you want to flip it and see if you get heads this time? I googled for random sampling probability for iphone and couldn't find anything.

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• Can I cache a ManyToOne hibernate object without it being lazy loaded?

  - by Andrew

  @ManyToOne @JoinColumn(name = "play_template_id", table = "team_play_mapping" ) public Play getPlay() { return play; } public void setPlay( Play play ) { this.play = play; } By default, this is eager loading. Can I get it so that it will read the play object from a cache without making it lazy loading? Am I correct that eager loading will force it to do a join query and hence no caching?

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• Is it possible to enable or disable xmlHTTP object from Browser?

  - by Vijay Prasath

  In Mac OS, Fire fox Version 3.6.3 is blocking XMLHttp Object in one machine but it didn't block in same set of OS and browser versions in other machine. Is there any way to enable or disable xmlhttp from browser?

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• Is there a function akin to fprintf but only returns the result of formated string in C?

  - by httpinterpret

  fprintf(stderr,"Error in pcap_findalldevs: %s\n", errbuf); I don't want to output anything via fprintf,but only the result of "Error in pcap_findalldevs: %s\n", errbuf,what's the function for that?

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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 to convert string to XML object in JavaScript?

  - by Jack Roscoe

  Hi, I am aware of this question already existing, but it has given me no luck. I have an application which loads a physicial XML document via the following method: jQuery.ajax( { type: "GET", url: fileName, dataType: "xml", success: function(data) { etc... I parse the XML and convert it into a string which is saved into a variable so that it can easily be stored in a database. How can I now convert the data in this variable back into an XML object so that it can be parsed as such?

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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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• Java: I want to print reverse of any String without using any predefine function?

  - by Sanjeev

  how to print reverse of String "java is object orientated language" without using any predefine function like reverse() in java? any idea.

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