operator-keyword

I want to have a function that evaluates 2 bool vars (like a truth table) for example: since T | F : T then myfunc('t', 'f', ||); /*defined as: bool myfunc(char lv, char rv, ????)*/ should return true; how can I pass the third parameter? (I know is possible to pass it as a char* but then I will have to have another table to compare operator string and then do the operation which is something I would like to avoid) Is it possible to pass an operator like ^(XOR) or ||(OR) or &&(AND), etc in a function/method? Thanks in advance Define: bool myfunc(char lv, char rv, boost::function<bool(bool,bool)

Can somebody tell me what precisely operator std::string() stands for? It is a conversion operator that allows the object to be explicitly or implicitly casted to std::string. When such a cast occurs, the operator is invoked and the result of the cast is the result of the invocation. As an example of an implicit cast, suppose you had a function that accepted type std::string or const std::string& , but not the given object type. Passing your object to that function would result in the conversion operator being invoked, with the result passed to the function instead of your type. It is a cast

I've been reading about overloading true and false in C#, and I think I understand the basic difference between this and defining a bool operator. The example I see around is something like: public static bool operator true(Foo foo) { return (foo.PropA > 0); } public static bool operator false(Foo foo) { return (foo.PropA <= 0); } To me, this is the same as saying: public static implicit operator bool(Foo foo) { return (foo.PropA > 0); } The difference, as far as I can tell, is that by defining true and false separately, you can have an object that is both true and false, or neither true nor

I have a domain class with unitPrice set as BigDecimal data type. Now I am trying to create a method to compare price but it seems like I can't have comparison operators in BigDecimal data type. Do I have to change data type or is there other way around? Simulant Every object of the Class BigDecimal has a method compareTo you can use to compare it to another BigDecimal. The result of compareTo is then compared > 0 , == 0 or < 0 depending on what you need. Read the documentation and you will find out. The operators == , < , > and so on can only be used on primitive data types like int , long ,

I'm quite new to Scala programming language, and was trying something out stucked in my mind while I was following the lecture notes at here . I think I couldn't really understand how cons operator works, here are some things I tried: I've created a pseudo-random number generator, then tried to create a list of one random value: scala> val gen = new java.util.Random gen: java.util.Random = java.util.Random@1b27332 scala> gen nextInt 3 :: Nil <console>:7: error: type mismatch; found : List[Int] required: Int gen nextInt 3 :: Nil ^ But it tried to pass List(3) to nextnt method. When i used

does anyone know the meaning of && and || when applied to integers in Ruby? Here are some examples in IRB when && and || are applied to integers: >> 1 && 2 => 2 >> 2 && 1 => 1 >> 15 && 20 => 20 >> 20 && 15 => 15 >> 0 && -1 => -1 >> -1 && -2 => -2 >> 1 || 2 => 1 >> 2 || 1 => 2 The boolean operators && , || , and and or are among the few that are not syntactic sugar for method calls, and thus, there are no different implementations in different classes. In other words: they behave exactly the same for all objects, i.e. they behave the same for Integer s as they do for String s, Hash es, Float s,

I'm receiving an error for multiple areas of my three files. (I'm also having problems with my default constructor, which is why it is commented out. But I want to solve this problem first) // ComputerType.h //************************************************************************ // This file gives the specification of a ComputerType abstract data type //************************************************************************ // #ifndef COMPUTERTYPE_H // #define COMPUTERTYPE_H #include<fstream> #include<iostream> #include<iomanip> #include<string> #include<cctype> using namespace std; class