I have three ordered ranks of web pages for a set of queries and would like to decide which rank performs better across all queries. Imagine that for 50 queries I have collected the top 10 results from Google, Bing and Yahoo. I would like to design a crowdsourcing experiment to decide which rank is better. Thanks in advance for any comm...
I am trying to evaluate a list that represents an expression in prefix notation. Here is an example of such a list: [+, [sin, 3], [- 10 5]] What is the best way to evaluate the value of the list ...
Hello SO, I think almost everybody know or heard about what I call the yes/no notation system: thumb up or thumb down. Youtube uses it at the moment. Education uses a ABCDEF grade notation. It doesn't really apply to web, I'm looking for methods that can be used for articles tips, or videos. Another notation system relies on stars. Up...
suppose i a have a multiplicative expression with lots of multiplicands (small expressions) expression = a*b*c*d*....*w where for example c is (x-1), d is (y**2-16), k is (x*y-60)..... x,y are numbers and i know that c,d,k,j maybe zero Does the order i write the expression matters for faster evaluation? Is it better to write c*d*...
It seems that simple comparison signs >,>= and their reverse components can evaluate if a certain variable is a number or not. Example $whatami='beast'; ($whatami<0)?echo 'NaN':echo 'is numeric!'; Are there cases where is_numeric() usage is necessary for positive values (number >0)? It seems that using comparison signs above would deter...
Tools: InstallShield 2009 Premier, Basic MSI Project What I Need: Option to enter License Key (setup key) during setup [I can use TrialWare, but it allows the user to install the product] and also option to setup evaluation version during install. So how to provide license key check during setup? ...
Has anyone of you done evaluation of a django project and how to improve/refactor it's code base? A pet project in company I work at is becoming more widely used and it would be good to improve its quality before further development. Are there any techniques or methodologies of analyzing django projects before we start putting more and m...
I have the following piece of latex code: \def\a{1} \def\b{2} \def\c{\a+\b} \def\d{\c/2} I expected \d to have the value 1.5. But it did not. However, adding parenthesis to the definition of \c like \def\c{\a+\b} Doesn't work either, because if I use \c somewhere, it complains about the parenthesis. Is there a way to evaluate \c ...
I want to store a boolean expression in a database, and evaluate it. It’s not necessary to store the complete expression tree, a string probably do it. I imagined a scheme like this: Criteria (expression_to_evaluate, value_to_return) For example, let’s say that I have an expression that matches people with age between 20 and 40: (var ...
I've been offered to be dispensed of classes in computer science in college, as the teacher noticed I obviously knew the introduction to coding. I'm extremely fluent in C# and with most programming concepts, so the exam shouldn't be so hard. I can also code in other languages such as C++, C, Lua, PHP, VB, etc. I'm not caring about passi...
I am trying to say $level > -100 && $level < 100 $level = 0; switch($level){ case $level > -100: break; ...
I wonder what is slower or faster: if( @$myvar['test'] === null ) { .. } or: if( !isset( $myvar['test'] )) { .. } Also wondering if you suppress a warning or notice with @, will it make the evaluation slower? Thanks for your answer! PS: It is not about the difference, i know that isset checks if a element is set and not if it is ...
I'm running into a bug in my code that makes me think that I don't really understand some of the details about F# and lazy evaluation. I know that F# evaluates eagerly and therefore am somewhat perplexed by the following function: // Open a file, then read from it. Close the file. return the data. let getStringFromFile = File.Open...
I had to develop some custom ASP.NET web controls because I couldn't find ones already available for purchase with the functionality required. I was surprised I couldn't find what I needed and I'm thinking the web controls I developed may be useful to others. So I'm thinking maybe I can sell my newly developed web controls and make a bu...
I have three functions that return integer error codes, e.g. int my_function_1(const int my_int_param); int my_function_2(const int my_int_param); int my_function_3(const int my_int_param); I want to assign and test for error at the same time for brevity. Will the following work and be portable? int error=0; ... if ( error || (...
This is what i have coded today #include <iostream> using namespace std; int function1() { cout<<"hello from function1()"; return 0; } int function2() { cout<<"hello from function2()"; return 0; } int main() { int func_diffresult = 0; func_diffresult = function1() - function2(); cout<<func_diffresult; /** prints 0 cor...
Because of certain special requirements of one of the C# applications I was developing, I had to write my own command-line arguments parser library. With the limited documentation available for GNU getopt (at least I couldn't find much immediately) and with my limited exposure to the open-source world, I couldn't comprehensively evaluate...
I'm looking for tools that help me evaluate the performance of a software architecture. For this specific project I need to model a [distributed] system of a modest size that is comparable to message oriented middleware (MOM). Based on a model I'd like to measure the system's performance under certain circumstances. Also, the tool(s) ...
Are there any good ways to limit the number of times an application can start or limit how long it can be used for under Windows 7 and using C#? As far as I can see the registry can be easily edited, there are programs to report any kind of file access, virtual machines can be used to change the system time back to when the application ...
As per @Potatoswatter's suggestion, I have created a new discussion. Reference is this response from @Potatoswatter Given the code snippet, int i = 3, &j = i; j = ++ i; The comment which I seek clarity on, is this. (which seems to be an important missing piece in my understanding of the unsequenced evaluation a.k.a sequence point)...