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  • Is there a website to lookup common, already written functions?

    - by pinnacler
    I'm sitting here writing a function that I'm positive has been written before, somewhere on earth. It's just too common to have not been attempted, and I'm wondering why I can't just go to a website and search for a function that I can then copy and paste into my project in 2 seconds, instead of wasting my day reinventing the wheel. Sure there are certain libraries you can use, but where do you find these libraries and when they are absent, is there a site like I'm describing? Possibly a wiki of some type that contains free code that anybody can edit and improve?

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  • What makes static initialization functions good, bad, or otherwise?

    - by Richard Levasseur
    Suppose you had code like this: _READERS = None _WRITERS = None def Init(num_readers, reader_params, num_writers, writer_params, ...args...): ...logic... _READERS = new ReaderPool(num_readers, reader_params) _WRITERS = new WriterPool(num_writers, writer_params) ...more logic... class Doer: def __init__(...args...): ... def Read(self, ...args...): c = _READERS.get() try: ...work with conn finally: _READERS.put(c) def Writer(...): ...similar to Read()... To me, this is a bad pattern to follow, some cons: Doers can be created without its preconditions being satisfied The code isn't easily testable because ConnPool can't be directly mocked out. Init has to be called right the first time. If its changed so it can be called multiple times, extra logic has to be added to check if variables are already defined, and lots of NULL values have to be passed around to skip re-initializing. In the event of threads, the above becomes more complicated by adding locking Globals aren't being used to communicate state (which isn't strictly bad, but a code smell) On the other hand, some pros: its very convenient to call Init(5, "user/pass", 2, "user/pass") It simple and "clean" Personally, I think the cons outweigh the pros, that is, testability and assured preconditions outweigh simplicity and convenience.

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  • How i implement the CGContextBeginPath() functions in iphone using objective-C?

    - by Rajendra Bhole
    Hi, I want to divide the circle using CGContext and following code of function given by apple API reference library, CGContextBeginPath (context); for (k = 0; k < count; k += 2) { CGContextMoveToPoint(context, s[k].x, s[k].y); CGContextAddLineToPoint(context, s[k+1].x, s[k+1].y); } CGContextStrokePath(context); The above code i want to implement inside following code instead of C5, C6 and C7 block, (void)drawRect:(CGRect)rect { // circle CGContextRef contextRef = UIGraphicsGetCurrentContext(); CGContextSetRGBFillColor(contextRef, 0, 0, 255, 0.1); CGContextSetRGBStrokeColor(contextRef, 0, 0, 255, 0.5); //CGContextFillEllipseInRect(contextRef, CGRectMake(100, 100, 150, 150)); CGContextStrokeEllipseInRect(contextRef, CGRectMake(100, 100, 150, 150)); CGContextRef c5= UIGraphicsGetCurrentContext(); CGContextSetLineWidth(c5, 2.0); CGContextSetStrokeColorWithColor(c5, [UIColor brownColor].CGColor); CGContextBeginPath(c5); CGContextMoveToPoint(c5, 175.0f, 175.0f); CGContextAddLineToPoint(c5, 100.0f, 175.0f); CGContextStrokePath(c5); CGContextRef c6= UIGraphicsGetCurrentContext(); CGContextSetLineWidth(c6, 2.0); CGContextSetStrokeColorWithColor(c6, [UIColor blueColor].CGColor); CGContextBeginPath(c6); CGContextMoveToPoint(c6, 175.0f, 175.0f); CGContextAddLineToPoint(c6, 175.0f, 250.0f); CGContextStrokePath(c6); CGContextRef c7= UIGraphicsGetCurrentContext(); CGContextSetLineWidth(c7, 02.0); CGContextSetStrokeColorWithColor(c7, [UIColor greenColor].CGColor); CGContextBeginPath(c7); CGContextMoveToPoint(c7, 175.0f, 175.0f); CGContextAddLineToPoint(c7, 175.0f, 100.0f); CGContextStrokePath(c7); } It is possible, if it is then how i should have implement?

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  • jquery slide toggle divs without creating multiple classes, functions, etc... ui accordion

    - by SPE
    Greetings, based on the jquery ui accordion I'm using, I have added a slide toggle to my accordion list items. so what happens is I click on an li and a div slides down underneath to reveal more content. The issue I'm having is that I find myself having to create multiple id's to reference the slidetoggle. example of the div id css: #panel, #panel2, #panel3, #panel4, etc.... the Is there a way I can use the slide toggle without having to adding another number so it will slide? I have 50 list items I'm using: Here's a sample of the js (as you can see where I'm going with this): $(".btn-slide").click(function(){ $("#panel").slideToggle("slow"); $(this).toggleClass("active"); return false; }); $(".btn-slide2").click(function(){ $("#panel2").slideToggle("slow"); $(this).toggleClass("active"); return false; }); sample html: <li><div class="slide"><a href="#" class="btn-slide">One</a></div><div id="panel"></div></li> <li><div class="slide"><a href="#" class="btn-slide2">Two</a></div><div id="panel2"></div></li>

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  • [.NET] How to load multiple mscorlib.dll and call their inner functions seperately?

    - by Sean
    Dears, This is for research purpose. I have .Net framework 2.0 installed, and I want to load mscorlib.dll 1.1 dynamiclly to execute its specific inner function. When I wrote this code in C#: static void Main(string[] args) { Assembly assem = Assembly.LoadFrom("C:\\mscorlib_my_private_1.1.dll"); System.Type type = assem.GetType("System.Console"); Type[] typeArray =new Type[1]; typeArray.SetValue(typeof(string),0); System.Reflection.MethodInfo info = type.GetMethod("WriteLine", typeArray); object[] param = new object[1]; param[0] = assem.FullName; type.InvokeMember("WriteLine", System.Reflection.BindingFlags.InvokeMethod, System.Type.DefaultBinder, "", param); } The output is "mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" Not the expected 1.1 version. After Googling a lot, I know that mscorlib.dll is very special, but is it impossible? Cheers~ Sean

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  • Is there any way to automatically break into debugger when my class library functions are getting ca

    - by mishal153
    I have a managed class library (say mylib.dll) and a 3rd party managed app (say app.exe) which is using mylib.dll. I have the code of mylib.dll but not of the app.exe. So currently what i do is i build mylib.dll, copy it to app.exe's directory, start app.exe and attach to the process. That way if i put breakpoints in code mylib.dll , i see them being hit. But is there anyway to automatically break in code of mylib.dll whenever any external application calls one of its exposed methods ? ie. Only for entrypoints of the dll. thanks, Mishal

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  • What does this code from AuthKit do? (where are these functions and methods defined?)

    - by Beau Simensen
    I am trying to implement my own authentication method for AuthKit and am trying to figure out how some of the built-in methods work. In particular, I'm trying to figure out how to update the REMOTE_USER for environ correctly. This is how it is handled inside of authkit.authenticate.basic but it is pretty confusing. I cannot find anyplace where REMOTE_USER and AUTH_TYPE are defined. Is there something strange going on here and if so, what is it? def __call__(self, environ, start_response): environ['authkit.users'] = self.users result = self.authenticate(environ) if isinstance(result, str): AUTH_TYPE.update(environ, 'basic') REMOTE_USER.update(environ, result) return self.application(environ, start_response) There are actually a number of all uppercase things like this that I cannot find a definition for. For example, where does AUTHORIZATION come from below: def authenticate(self, environ): authorization = AUTHORIZATION(environ) if not authorization: return self.build_authentication() (authmeth, auth) = authorization.split(' ',1) if 'basic' != authmeth.lower(): return self.build_authentication() auth = auth.strip().decode('base64') username, password = auth.split(':',1) if self.authfunc(environ, username, password): return username return self.build_authentication() I feel like maybe I am missing some special syntax handling for the environ dict, but it is possible that there is something else really weird going on here that isn't immediately obvious to someone as new to Python as myself.

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  • Fields of class, are they stored in the stack or heap?

    - by Mirek
    I saw a question yesterday which raised (for me) another question. Please look at the following code: public class Class1 { int A; //as I uderstand, int is value type and therefore lives in the stack } class Class2 { Run() { Class1 instance1 = new Class1(); instance1.A = 10; //it points to value type, but isnt this reference (on heap)? } } Or while creating the instance of Class1, its field types are created on the heap as well? But then I do not understand when it would really be on the stack as almost always you need to create an instance of object in order to use it fields.

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  • Powershell advanced functions: are optional parameters supposed to get initialized?

    - by Richard Berg
    filter CountFilter($StartAt = 0) { Write-Output ($StartAt++) } function CountFunction { [CmdletBinding()] param ( [Parameter(ValueFromPipeline=$true, Mandatory=$true)] $InputObject, [Parameter(Position=0)] $StartAt = 0 ) process { Write-Output ($StartAt++) } } $fiveThings = $dir | select -first 5 # or whatever "Ok" $fiveThings | CountFilter 0 "Ok" $fiveThings | CountFilter "Ok" $fiveThings | CountFunction 0 "BUGBUG ??" $fiveThings | CountFunction I searched Connect and didn't find any known bugs that would cause this discrepancy. Anyone know if it's by design?

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  • Are my files physically stored in Subversion Repository folder ?

    - by Emran Hussain
    Hello, I have imported a fresh new project into my Subversion repository which is of 36MB, but after I imported my project, I checked the Repository folder and I see that the Repository folder just increased by 6MB. So, I am wondering, where actually my project files are saved ? Environment: Windows 7, Client : Tortoise Subversion, Visual Studio Plugin : Visual Subversion.

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  • How do you find a functions virtual call address in assembly?

    - by Daniel
    I've googled around but i'm not sure i am asking the right question or not and i couldn't find much regardless, perhaps a link would be helpful. I made a c++ program that shows a message box, then I opened it up with Ollydbg and went to the part where it calls MessageBoxW. The call address of MessageBoxW changes each time i run the app as windows is updating my Imports table to have the correct address of MessageBoxW. So my question is how do i find the virtual addres of MessageBoxW to my imports table and also how can i use this in ollydbg? Basically I'm trying to make a code cave in assembly to call MessageBoxW again. I got fairly close once by searching the executable with a hex editor and found the position of the call, and I think I found the virtual address. But when i call that virtual address in olly and saved it to the executable, the next time i opened it the call was replaced with a bunch of DB xyz (which looked like the virtual address but why did the call get removed? Sorry if my terminology is off as i'm new to this so i'm not quite sure what to call things.

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  • Using MS Moles with datacontext and stored procedures without using a Connection string.

    - by Brian
    I have just begun to work with MS Moles for testing and I have followed the idea/pattern in which jcollum(thanks) uses a Mole for a table in this stackoverflow question here. But I am having a problem as I do not want to have to pass a connection string when I use the datasource as such: using (TheDataContext dataContext = new TheDataContext(myConnectionString)) { dataContext.ExecuteStoredprocedure(value, ref ValueExists); } I really like the fact that I just need to mole the table and everything else is done for me. I realize I could just mole the ExecuteStoredProcedure method, but I am wondering if I could just somehow avoid the sql exception I am getting here when I do not pass in the connection string. Or, if I there is a better way to do this? Therefore, does anyone have a solution so that I can avoid placing in the connection string? Thanks in advance.

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  • Create unordered list tree menu from data stored in an table with the adjacency list model...php

    - by Ronedog
    I need to create a tree menu of "nth" subcategories. I settled on using the adjacency list model for my table structure, because I won't be updating this table very much and this seemed the easiest to implement for my use. I want to style the output using "ul" and "li" tags...I already have a css and jquery solution to do the styling. My problem comes from pulling the data out of the database and using a recursive function via PHP to build the list ... the list is a concatenated string that gets parsed to build the tree. I'm really having a hard time getting the closing "ul" and "li" tags to line up just where they need to be. Is this the best way to do this? Are there other better ways using arrays or something like that to do this? Any examples you can point me to of "best practices" for building a list like this will be appreciated. Thanks.

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  • can I override/redefine "global" Javascript functions, like confirm() and alert()?

    - by EndangeringSpecies
    I want to do some browser automation, and those pesky confirm/alert boxes are a real pain. Disabling javascript completely in this case is not an option, unfortunately. Well, so I was wondering, can I just change the definition of those methods as seen by my browser's javascript interpreter to basically do nothing and return true? Note that I do know about redefining them in the Javascript code directly, e.g. putting in function alert(message) { return true; } but AFAIK this is not a viable approach for this situation because when doing browser automation I have to work with other people's Javascript. Moreover, my program actually begins manipulating these websites already after the page has fully loaded into the browser, so I cannot just first automatically rewrite the javascript and then load the page. Well, so I was wondering if I could instead just "permanently" modify the way alert/confirm are implemented and executed in my browser. Sort of like the equivalent of dll injection and so forth in the realm of windows apps.

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  • How to judge the relative efficiency of algorithms given runtimes as functions of 'n'?

    - by Lopa
    Consider two algorithms A and B which solve the same problem, and have time complexities (in terms of the number of elementary operations they perform) given respectively by a(n) = 9n+6 b(n) = 2(n^2)+1 (i) Which algorithm is the best asymptotically? (ii) Which is the best for small input sizes n, and for what values of n is this the case? (You may assume where necessary that n0.) i think its 9n+6. guys could you please help me with whether its right or wrong?? and whats the answer for part b. what exactly do they want?

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  • How to display a picture stored in database in the ASP.NET DetailsView?

    - by Alex
    Hi, I'm having a problem of displaying a picture in the DetailsView..what is the way to bind it with the DetailsView?My picture is retrieved from database and put with other needed information in a dataset..how can i extract it from dataset and bind with a particular field of DetailsView in order to display it? I would really appreciate any help Thanks

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  • Is there a way to rewrite a url to go to a file stored in the filefield of the node

    - by kidbrax
    I have a custom content-type called 'document' On this content-type, I have a File field where a user can upload a document. Assume the path to a document node is /somesite/document/tester I would like to be able to link to /somesite/document/tester/file and it automatically go to the file that is uploaded to the file field of the node. I have tried the url_alter module and am able to get the correct url of the document but when it tries to go there, it says not found. It seems that my redirection is still trying to be rewritten with pathauto or something. Ulitamtely, we want to have a consistent url for these documents so that a user can upload a replacement document and we can still use the same urls. Any ideas?

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