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Search found 4206 results on 169 pages for 'equals operator'.

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• Should I always include stddef.h if I use sizeof and size_t

  - by yCalleecharan

  Hi, if I'm using the sizeof operator and making use of size_t in my code, do I have necessarily have to include stddef.h? I haven't included stddef.h, and my code compiles without warning with both MVS2008 and with Borland C++ BuilderX. Thanks a lot...

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• ordering by a property on a joined table linq to sql

  - by Gazeth

  I have the following linq query from o in context.Opportunities join i in context.Interactions on o.OpportunityID equals i.OpportunityID into ints from i in ints.DefaultIfEmpty() orderby i.StatusID descending, o.StatusID descending select o Now i want to then do a distinct on the opportunities table but doing so removes my orderby. I know that you can do Distinct().OrderBy but how do i get a reference to the interactions table that was joined when I'm only selecting the opportunity entity?

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• Can I get a raw pointer from boost's weak_ptr?

  - by Czubaka

  Is it possible to get a raw pointer from boost::weak_ptr? Boost's shared_ptr has get() method and "-" operator. Is there some rationale behind weak_ptr not having the same functionality?

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• pls give reason why this java program always comes to the else part

  - by Anbu

  public class Test { public static void main(String[] args){ if (5.0 5) // (5.0<5) for both case it is going to else System.out.println("5.0 is greater than 5"); else System.out.println("else part always comes here"); /another sample/ if (5.0 == 5) System.out.println("equals"); else System.out.println("not equal"); } } can any one explain the first "if statement" why it always come to else part

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• concurrentmodificationexception hashmap in java

  - by chetan

  I write following code but when this run it generate concurrentmodificationexception if( attendancePolicy.getType().equals( AttendanceConstants.EMPLOYEE_ATTENDANCE_POLICY ) ) { synchronized( attendancePolicy.getListEmployee() ) { for( EmployeeAttendancePolicy employeeAttendancePolicy : attendancePolicy.getListEmployee() ) { employeeInfo = employeeInfoSessionBeanLocal.findEmployeeInfoEntityByEmployeeInfoId( employeeAttendancePolicy.getEmployeeId() ); if( employeeInfo != null ) { employeeAttendancePolicy.setEmpName( employeeInfo.getFirstName() + " " + employeeInfo.getMiddleName() + " " + employeeInfo.getLastName() ); company = companySessionBeanLocal.findCompanyById( employeeInfo.getCompanyId() ); employeeAttendancePolicy.setCompanyName( company.getName() ); department = departmentSessionBeanLocal.findDepartmentEntityByDepartmentId( employeeInfo.getDepartmentId() ); employeeAttendancePolicy.setDepartmentName( department.getName() ); } else { attendancePolicy.getListEmployee().remove( employeeAttendancePolicy ); } } } }

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• How to delete zero components in a vector in Matlab?

  - by xiaodai

  I have a vector for example a = [0 1 0 3] I want to turn a into b which equals b = [1 3] How do I perform this in general? So I have a vector with some zero components and I want to remove the zeroes and leave just the non-zero numbers. Sorry I am new to Matlab

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• Java lang object

  - by Neeraj

  why java Object class has two methods hashcode() and equals()? One of them looks redundant and its percolated to the bottom most derived class?

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• What is MySql equivalent of Sql Server Full Text Search?

  - by Nitesh Panchal

  Hello, I have worked with Sql Server in past and used it's very nice feature called Sql Full Text Search. Now i have to work with MySql. Can anybody tell me what is equivalent of Full Text Search in MySql? I am using free edition of MySql and not a commercial one. If not, then what else can we do to mimic Full Text Search and get over the limitations of LIKE operator? Thanks in advance :)

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• Groovy , what does -> mean

  - by user350325

  In examples of groovy code I find the -> operator everywhere, but the groovy tutorials nor the book I have seem to provide any explaination as to what this means.

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• Doubt in Conditional inclusion

  - by Philando Gullible

  This is actually extracted from my module (Pre-processor in C) The conditional expression could contain any C operator except for the assignment operators,increment, and decrement operators. I am not sure if I am getting this statement or not since I tried using this and it worked.Also for other manipulation a probable work around would be to simply declare macro or function inside the conditional expression,something like this to be precise. Also I don't understand what is the rationale behind this rule. Could somebody explain? Thanks

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• How to select a random element in std::set?

  - by dehmann

  How can I select a random element in an std::set? I naively tried this: int GetSample(const std::set<int>& s) { double r = rand() % s.size(); return *(s.begin() + r); // compile error } But the operator+ is not allowed in this way.

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• How to differentiate two tables

  - by Nemat

  I have two tables and I want to get all records from one table that are different from the records in second table. Eg.: if we have four records in the first table like A,B,C,D and three records in the second table thats A,B,C then the answer of query should be D. I have tried "EXCEPT" operator but it doesn't work fine. Kindly help me in writing correct query for the given problem.

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• mysql: Can I use two "where"s? Like, "SELECT * FROM table WHERE something and something"?

  - by KeriLynn

  I have a table with my products and I'm trying to write a page that would pull bracelets with certain colors from the database. So here's what I have right now (in php): $query = "SELECT * FROM products WHERE (products.colors LIKE '%black%')"; But I only want to select rows where the value for the column "category" equals "bracelet". I've tried a few different things, but I keep getting warnings and errors. I appreciate any help you can give, thank you!

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• Using two threads and controlling one from the other in java?

  - by sidra

  Can someone please help me out. I need to use two threads in a way that one thread will run permanently while(true) and will keep track of a positioning pointer (some random value coming in form a method). This thread has a logic, if the value equals something, it should start the new thread. And if the value does not equal it should stop the other thread. Can someone give me some code snippet (block level) about how to realize this?

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• How to trim minutes and hours and seconds from Date object?

  - by Roman

  I need to make map where Dates are keys. 2 date objects are equals if they have the same value of getTime() method. I'm interested only in year, month and day. How can I trim unnecessary hours and minutes to get 'clear' dates?

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• How Java do the string concatenation using "+"?

  - by Tom Brito

  I read about the way Java works with += operator, using StringBuilder. Is it the same with a ("a" + "b") operation?

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• What is the difference between is_a and instanceof?

  - by Daniel L

  I am aware that instanceof is an operator and that is_a is a method. Is the method slower in performance? What would you prefer to use?

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• MongoDB using NOT and AND together

  - by Stankalank

  I'm trying to negate an $and clause with MongoDB and I'm getting a MongoError: invalid operator: $and message back. Basically what I want to achieve is the following: query = { $not: { $and: [{institution_type:'A'}, {type:'C'}] } } Is this possible to express in a mongo query? Here is a sample collection: { "institution_type" : "A", "type" : "C" } { "institution_type" : "A", "type" : "D" } { "institution_type" : "B", "type" : "C" } { "institution_type" : "B", "type" : "D" } What I want to get back is the following: { "institution_type" : "A", "type" : "D" } { "institution_type" : "B", "type" : "C" } { "institution_type" : "B", "type" : "D" }

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• Why doesn't this inner class compile?

  - by Vincenzo

  This is my code: #include <algorithm> class A { void f() { struct CompareMe { bool operator() (int i, int j) { return i < j; } } comp; int a[] = {1, 2, 3, 4}; int found = std::min_element(a[0], a[3], comp); } } Error message: no matching function for call to ‘min_element(int&, int&, A::f()::CompareMe&) What am I doing wrong?

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• equal insread of distinct

  - by MirooEgypt

  SELECT DISTINCT IncreasmentAmount, Name, regionid FROM Pricing.GroupOfRegions where regionid in (6,7) i have this result 12.80 AB 6 13.00 ABC 6 15.00 AC 6 12.80 AB 7 13.00 ABC 7 i wanna add more condition where IncreasmentAmount are equals which means i got the rows where regionid in (6,7) and have the same IncreasmentAmount so i got finally 12.80 AB 6 12.80 AB 7

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• LINQ display row numbers

  - by timvaines

  I simply want to include a row number against the returned results of my query. I found the following post that describes what I am trying to achieve but gives me an exception http://vaultofthoughts.net/LINQRowNumberColumn.aspx "An expression tree may not contain an assignment operator" In MS SQL I would just use the ROWNUMBER() function, I'm simply looking for the equivalent in LINQ.

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• Explanation about a Java statement

  - by monn

  public static void main(String[] args) { int x = 1 + + + + + + + + + 2; System.out.println(x); } I can compile above method. Is there any explanation about the allowed multiple "+" operator?

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• Intermediate values in C++

  - by sterh

  Hello. I can not find how to implement a design in C++. In the language of Delphi in case the operator can write the following design: case s[j] of '0'..'9','A'..'Z','a'..'z','_': doSomeThing(); How can i do the same in c++. Attracts me is the construction type 'a' .. 'z' and etc... Thank you

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• Using rowDiffs() to calculate difference in values in matrix

  - by user1723765

  I'm using the rowDiffs() command to calculate the step by step difference in 116 rows in a matrix. I get the following error: Error in r[i1] - r[-length(r):-(length(r) - lag + 1L)] : non-numeric argument to binary operator I have no idea why this is happening. I could take the diff() separately for each row and it would work. Any ideas? Here's the data: https://dl.dropbox.com/u/22681355/data.csv Code: a=rowDiffs(data)

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• AS3 - Can I know if a class implements an interface (or is a subclass of another class) ?

  - by lk

  With this code function someFunction(classParam:Class):Boolean { // how to know if classParam implements some interface? } i.e. Comparing classParam with IEventDispatcher interface: someFunction(EventDispatcher) // returns true someFunction(Object) // returns false I know it can't be done with is operator. But, is there a way to do it? Is there a way to know if a class implements some interface? (or is a subclass of another class?)

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