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• assign operator to variable in python?

  - by abhilashm86

  Usual method of applying mathematics to variables is a * b Is it able to calculate and manipulate two operands like this? a = input('enter a value') b = input('enter a value') op = raw_input('enter a operand') then how do i connect op and two variables a and b?? i know i can compare op to +, -, %, $ and then assign and compute.... but can i do something like a op b , how to tell compiler that op is an operator?? any tweaks possible?

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• What does the operator "<<" mean in C#?

  - by Kurru

  I was doing some basic audio programming in C# using the NAudio package and I came across the following expression and I have no idea what it means, as i've never seen the << operator being used before. So what does << mean? Please give a quick explaination of this expression. short sample = (short)((buffer[index + 1] << 8) | buffer[index + 0]);

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• Why can't I use interface with explicit operator?

  - by theburningmonk

  Hi, I'm just wondering if anyone knows the reason why you are not allowed to use interfaces with the implicit or explicit operators? E.g. this raises compile time error: public static explicit operator MyPlayer(IPlayer player) { ... } "user-defined conversions to or from an interface are not allowed" Thanks,

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• like operator in linq

  - by Luca Romagnoli

  i need to use the like operator in a linq query for this: timb = time.Timbratures.Include("Anagrafica_Dipendente") .Where(p => p.Anagrafica_Dipendente.Cognome + " " + p.Anagrafica_Dipendente.Nome like "%ci%"); How can i do?

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• What is the instanceof operator in JavaScript?

  - by Alon

  What is the instanceof operator in JavaScript? I saw this in a blog post by John Resig, and didn't understand what does it means in regular JavaScript code (without that library).

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• 'And' operator in Linq

  - by Ani

  I have a query that prints userid in label1 when username is entered.Works fine; but i want to write query for username and password that prints userid. so how can i write it? i tried writing using 'and' operator but dont seems to work. int id = (from auser in lq.logins where auser.username == userNameString //&& auser.Password =pwdString select auser.userid).SingleOrDefault(); label1.Text = id.ToString(); Thanks Ani

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• An interview question on conditional operator

  - by nthrgeek

  I recently encountered with this question: How to reduce this expression: s73?61:60;. The hint given was that Instead of using conditional operator we could use a simple comparison which will work fine. I am not sure but I think it is possible with some GCC extension,although I am unable to figure it out myself. EDIT:The whole expression is this : s-=s73?61:60

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• javascript if/else or ternary operator is faster?

  - by Jeff

  Which method is faster or more responsive in javascript, if/else or the ternary operator? Is it preferred to use one or the other and if so, for what reasons?

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• like operator issue

  - by Domnic

  I have dom table select * from dom dom table details: id name skills 1 dom c,c++ here i want to retrive query using like operator select * from dom where skills like '%c,c++%' then i got the desired result.....thats not a problem suppose if i want to use the belove query select * from dom where skills like '%C++,C%' i didnt get result So i have to show details even if i search reverse order in database how can i?

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• lambda operator c# learning

  - by Night Walker

  Hello all Can you recommend me on places where i can read and see examples on usage of Lambda operator in c# . I will really like to see a lot examples on it... Thanks.

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• Can I replace the binding operator with the smart match operator in Perl?

  - by sid_com

  How can I write this with the smart match operator (~~)? use 5.010; my $string = '12 23 34 45 5464 46'; while ( $string =~ /(\d\d)\s/g ) { say $1; }

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• Django 1.1 equivalent of the 'in' operator

  - by DavidG

  I need to display a piece of HTML only if a variable value appears in a list. I know that Django 1.2 has an 'in' operator. But I am working on a Google App Engine app. Is there a workaround I can use?

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• How to Add Custom Rule to FXCop for avoiding == operator inside the method

  - by Jameel

  I want to add a Custom rule for avoiding the '==' operator inside a method in a class. For example in the below method i need to avoid 'str1==str2' with string.Compare(str1, str2,StringComparison.Ordinal);.So I need to check this types of code are appear in any of the method public void StringTest2() { string str1 = "Hello"; string str2 = "HELLO"; if (str1 == str2) { } }

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• Use of infix operator hack in production code (Python)

  - by Casebash

  What is your opinion of using the infix operator hack in production code? Issues: The effect this will have on speed. The potential for a clashes with an object with these operators already defined. This seems particularly dangerous with generic code that is intended to handle objects of any type. It is a shame that this isn't built in - it really does improve readability

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• Calling assignment operator in copy constructor

  - by stas

  Are there some drawbacks of such implementation of copy-constructor? Foo::Foo(const Foo& i_foo) { *this = i_foo; } As I remember, it was recommend in some book to call copy constructor from assignment operator and use well-known swap trick, but I don't remember, why...

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• Greatest of Two Numbers Without Using A Relational Operator

  - by ratty

  I want to find the greater of two numbers without using < > this relational operator. I tried this int a,b; if(a/b==0) { b is greater } else { a is greater } but this not working for negative numbers.

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• <:< operator in scala.

  - by scout

  Can anybody provide some details on <:< operator in scala. I think if(apple <:< fruit) //checks if apple is a subclass of fruit. Are there any other explanations? I see many definitions in the scala source file.

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• Scala @ operator

  - by lowercase

  What does scala @ operator do? For example at this page there is a something like this case x @ Some(Nil) => x

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• using 'new' operator

  - by notLikeCpp

  I have simple task concerning 'new' operator. I need to create array of 10 chars and then input those chars using 'cin'. Should it look like this ? : char c = new char[10]; for(int i=0; i < 10; i++) { cin >> char[i] >> endl; }

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• C# analog for sql in operator

  - by er-v

  There is in operator in SQL SELECT * FROM MyTable WHERE id IN (1, 2, 3, 4, 5) Is there similar sintax in C#, I mean if(variable in (1, 2, 3, 4, 5)){ }

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• App Engine datastore does not support operator OR

  - by JohnIdol

  I am trying to query the google datastore for something like (with pm -- persistanceManager): String filters = "( field == 'value' || field == 'anotherValue' )"; Query query = pm.newQuery(myType.class, filters); When I execute - I am getting back: App Engine datastore does not support operator OR. What's the best approach in people experience for this kind of queries? Any help appreciated!

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• biggest of two nos without using relational operator

  - by ratty

  i like to find the greatest of two nos without using < this relational operator. i tired this int a,b; if(a/b==0) { b is greater } else { a is greater } but this not working for negative nos .please help for this

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• Which namespace does operator<< (stream) go to?

  - by aaa

  If I have have some overloaded ostream operators, defined for library local objects, is its okay for them to go to std namespace? If I do not declare them in std namespace, then I must use using ns:: operator <<. As a possible follow-up question, are there any operators which should go to standard or global namespace?

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• How does the bitwise operator '^' work?

  - by SpawnCxy

  I'm a little confused when I see the output of following code: $x = "a"; $y = "b"; $x ^= $y; $y ^= $x; $x ^= $y; echo $x; //got b echo $y; //got a And I wonder how does the operator ^ work here?Explanations with clarity would be greatly appreciated!

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• What does the ^ operator do in Java?

  - by joroj

  What function does the "^" operator serve in Java? When I try this: int a = 5^n; ...it gives me: for n = 5, returns 0 for n = 4, returns 1 for n = 6, returns 3 ...so I guess it doesn't indicate exponentiation. But what is it then?

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