I'm looking for a library or source code that provides guard methods such as checking for null arguments. Obviously this is rather simple to build, but I'm wondering if there are any out there for .NET already. A basic Google search didn't reveal much. ...
Suppose I have a free function called InitFoo. I'd like to protect this function from being called multiple times by accident. Without much thought I wrote the following: void InitFoo() { { static bool flag = false; if(flag) return; flag = true; } //Actual code goes here. } This looks like a big wa...
i just noticed the guard method/class mentioned in this question and i don't really get the concept from the answers. And alas, Jon Skeet's link to an MS site never loaded. A few quick Google searches seemed to yield only products, not software engineering concepts. Any explanation and/or samples would be appreciated. (Especially from t...
I would like to use scope guard in C in order to do profiling. I would like to know how much time I spend in a function. Here is what I do: int function() { tic(); ... do stuff ... if (something) { toc(); return 0; } toc(); return 1; } I need to place a toc statement each time I exit the function. I would li...
For example: newfile :: FilePath -> IO Bool newfile x | length x <= 0 = return False | doesFileExist x == True = return False | otherwise = return True Can this be made to work? ...
I have an app for iPhone in development which works properly when the Malloc guard is not enabled. However when i try to enable the malloc guard i get the following error after the app is loaded. #0 0x95f65684 in objc_msgSend () #1 0x30506515 in NSPopAutoreleasePool () #2 0x30901697 in _UIApplicationHandleEvent () #3 0x32046375 ...
If you look at the example for catches: f = expr `catches` [Handler (\ (ex :: ArithException) -> handleArith ex), Handler (\ (ex :: IOException) -> handleIO ex)] It looks like catches has defined a custom mechanism to match on patterns (the two exception types). Am I mistaken, or can this be generalized to ...
I am using store kit api for an application on iphone. I would like to know if it is possible to enable Malloc Guard while running on the device and see if there are any memory leaks. Could someone let me know if it is possible? ...
I am just beginning Haskell, but from all the online tutorials I've found I can't seem to find if there is one accepted way to do a conditional control statement. I have seen if-else, guards, and pattern matching, but they all seem to accomplish the same thing. Is there one generally accepted/faster/more efficient way than the rest? ...
Hi, After setting up primary database which is setup with Raid1. I break the mirror and physically transfer it to the standby database hardware and did a Raid1 sync. With that I have exact replicate of the primary database on the standby database. However, since the standby database's data is exactly the same as primary database, I ha...
when I try to make httpclient connection to get the url information,I am getting Exception in thread "Timeout guard" 2010-05-29 19:42:00,048 ERROR [STDERR] java.lang.NoClassDefFoundError: org/apache/commons/httpclient/protocol/ProtocolSocketFactory 2010-05-29 19:42:00,048 ERROR [STDERR] at org.apache.commons.httpclient.protocol.Contro...
Suppose I have a class A and a class B. The .h of A, needs the .h of B, and the .h of B needs the .h of A. (need = #include). All .h have the guards: #ifndef _classX_ #define _classX_ ... ... #endif But if I compile the .cpp of A, then when it includes the .h of B, the B class cannot include the .h of A class because the A class has...
There is this index function in "Erlang Programming": index(0, [X|_]) -> X; index(N, [_|Xs]) when N>0 -> index(N-1, Xs) Isn't the guard "when N>0" superfluous because of the pattern matching? Calling index(0, List) will never end up in the second clause so N will always be > 0. Or am I totally wrong here? ...
I just recently learned about Scope Guard C++ idiom. Unfortunately I can't find any good implementation of it. Can anyone point me to some good and usable Scope Guard implementation in C++? Thanks, Boda Cydo. ...
test :: [String] -> [String] test = foldr step [] where step x ys | elem x ys = x : ys | otherwise = ys I am trying to build a new list consisting of all the distinct strings being input. My test data is: test ["one", "one", "two", "two", "three"] expected result: ["one", "two", "three"] I am new to Has...
Lets say i have a piece of code like this: test pattern | pattern == (_,NOT (WIRE _)) = 1 | pattern == (_,AND (WIRE _) (WIRE _)) = 2 | otherwise = 0 Where i am trying to match it against one of several possibilities, some with one (WIRE ""), some with two. I have actual input as follows e.g.: ("p",NOT (WIRE "x")). I would like...