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  • Dynamic Comparison Operators in PHP

    - by BenTheDesigner
    Hi All Is it possible, in any way, to pass comparison operators as variables to a function? I am looking at producing some convenience functions, for example (and I know this won't work): function isAnd($var, $value, $operator = '==') { if(isset($var) && $var $operator $value) return true; } if(isAnd(1, 1, '==='))

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  • references in C++

    - by Alexander
    Once I read in a statement that The language feature that "sealed the deal" to include references is operator overloading. Why are references needed to effectively support operator overloading?? Any good explanation?

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  • overloading new/delete problem

    - by hidayat
    This is my scenario, Im trying to overload new and delete globally. I have written my allocator class in a file called allocator.h. And what I am trying to achieve is that if a file is including this header file, my version of new and delete should be used. So in a header file "allocator.h" i have declared the

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  • string.format vs + for string concatenatoin

    - by AMissico
    Which is better in respect to performance and memory utilization? // + Operator oMessage.Subject = "Agreement, # " + sNumber + ", Name: " + sName; // String.Format oMessage.Subject = string.Format("Agreement, # {0}, Name: {1}", sNumber, sName); My preference is memory utilization. The + operator is used

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  • c++ template and its element type

    - by David
    This is my template matrix class: template<typename T> class Matrix { public: .... Matrix<T> operator / (const T &num); } However, in my Pixel class, I didn't define the Pixel/Pixel operator at all! Why in this case, the compiler still compiles?

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  • Lifting a math symbol in LaTeX

    - by Chris Conway
    I'm using the symbol \otimes as a unary operator and it's vertical alignment doesn't seem right to me. It wants to sit a bit below the baseline: and I tried using \raisebox to fix this, e.g., \raisebox{1pt}{$\otimes$}: But \raisebox doesn't seem to be sensitive to subscripts. The operator stays

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  • by reference in C++

    - by lego69
    I have this snippet of the code Stack& Stack:: operator=(const Stack& stack){ if(this == &stack){ return *this } } here I define operator = but I can't understand, if I receive by reference stack why it should be & in this == &stack and not this == stack and why we

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  • What am I calling?

    - by Knowing me knowing you
    Is there a way to check inside a fnc what is this fnc name? I'm working currently on LargeInt class and I've realized that code for oparator and operator< is almost identical so I would like to know what operator is calling me and react accordingly. Thank you.

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  • safe dereferencing and deletion

    - by serejko
    Hi, I'm relatively new to C++ and OOP in general and currently trying to make such a class that allows to dereference and delete a dead or invalid pointer without any care of having undefined behavior or program fault in result, and I want to ask you is it a good idea and is there something similar

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  • Help with string manipulation function

    - by MusiGenesis
    I have a set of strings that contain within them one or more question marks delimited by a comma, a comma plus one or more spaces, or potentially both. So these strings are all possible: BOB AND ? BOB AND ?,?,?,?,? BOB AND ?, ?, ? ,? BOB AND ?,? , ?,? ?, ? ,? AND BOB I need

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  • RegEx for MetaMap in Java

    - by Christian
    MetaMap files have following lines: mappings([map(-1000,[ev(-1000,'C0018017','Objective','Goals',[objective],[inpr],[[[1,1],[1,1],0]],yes,no)])]). The format is explained as mappings( [map(negated overall score for this mapping, [ev(negated candidate score,'UMLS

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  • Can MySQL Nested Select return list of results

    - by John
    Hi I want to write a mysql statement which will return a list of results from one table along with a comma separated list of field from another table. I think an example might better explain it Table 1 ======================== id First_Name Surname ---------------------- 1 Joe

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  • How to get the Output value of SP using C#

    - by karthik
    I am using the following Code to execute the SP of MySql and get the output value. I need to get the output value to my c# after SP is executed. How ? Thanks. Code : public static string GetInsertStatement(string DBName, string TblName, string ColName, string ColValue) {

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  • Exporting info from PS script to csv

    - by George
    Hi, This is a powershell/AD/Exchange question.... I'm running a script against a number of Users to check some of their attributes however I'm having trouble getting this to output to CSV. The script runs well and does exactly what I need it to do, the output on screen is fine,

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