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  • Mixing LINQ to SQL with properties of objects in a generic list

    - by BPotocki
    I am trying to accomplish something like this query: var query = from a in DatabaseTable where listOfObjects.Any(x => x.Id == a.Id) select a; Basically, I want to filter the results where a.Id equals a property of one of the objects in the generic list "listOfObjects". I'm getting the error "Local sequence cannot be used in LINQ to SQL implementation of query operators except the Contains() operator." Any ideas on how to filter this in an easily readable way using "contains" or another method? Thanks in advance.

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  • Add different themes to the android application

    - by mudit
    hi all. i want to add themes to my android application. In the application, user will have options to changes theme of the application. Just like OIShopping List appplication. Please help how do i implement this kind of structure to my application. Any help, tutorials, guidance are highly appreciated. thanks..

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  • Wrong effective-pom output

    - by Jin Kwon
    When calling help:effective-pom in some child modules position, the output prints wrong path. some url like .../${groupId}/${some_other_sibling's_artifactId}/... This is also make site deploy wrong. Can anybody help?

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  • Flex Nested Drag And Drop

    - by Soumitra
    i have a canvas where i can add layout say another canvas.So both the canvas have drag enter and drag drop event . I want to toggle this events .. i.e when outer canvas will accept drag inner will not accept and when inner will accept drag outer will not.I am facing a problem in nested drop events..Inner drop event is not working..Please help me out..Waiting for your help

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  • C++ and preprocessor macro gotcha

    - by aaa
    hello. Appologies for yet another gotcha question. Can you figure out what is wrong with the statement below? gcc error states: "type name declared as function returning array". #define MACRO(a) (a)[1] class index { typedef int index_type[2]; index_type& operator[](int i); }; int k = 0; int i = MACRO(index()[k]); ps: is such questions are deemed too annoying, I am going to stop.

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  • File Acces\Rename Issue

    - by Moon .
    Guys, i am having serious problem with media files (only video files). When i try to rename or delete a Files or the Folders that contained media files, i get an error. "Access Denied .... Some other program might be using this file..... bla bla bla" Previously for this knida problem i had a freeware "Unlocker" that used to work. What "Unlocker" used to do was simply kill the process that is using the file. But in my case, now that is, the process using the files is "Explorer.exe" W.T.F... A strange behavior, when i copy paste the same file. The copied file, I can rename it, i can delete it, i can shit on it if i want to.... but what is wrong with the original file. Check the following list. It will give you a better idea of my situation. I am using Win XP SP 2 I have got Div Player installed (latest) The media files are from both, my hard drive, created by many of my previous window installations. And new downloaded files. So Files ownership or Privacy is not an issue. I may not be able to rename\delete those files one moment, the next moment, in the next try, i might succeed. The problem is a major F. i can't figure it out. Please F1! its getting on my nerves.

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  • Facebook "like" button for blogger

    - by Veraa
    Hi, i have been looking for a javascript code which is like the facebook "like" widget to put in my blogger site. The examples of the buttons are like in the following website, http://textsfromlastnight.com/ Where people are able to flag the "Good Nights" or "Bad Nights". I have no experienced in writing scripts neither do i have any script writing programs, so was wondering if any people can help with the scripts, or maybe tutorials would be of great help! Thanks!

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  • Glib::ustring and Japanese characters

    - by user294787
    Glib::ustring is supposed to work well with UTF8 but I have a problem when working with Japanese strings. If you compare those two strings, "???" and "???", using == operator or compare method, it will answer that those two strings are equals. I don't understand why. How Glib::ustring works ? The only way I found to get false to the comparison is to compare strings of different sizes. For example "?????" and "????". Very strange...

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  • How to create and Expression tree to do the same as "StartsWith"

    - by Jonathan
    Hi to all. Currently, I have this method to compare two numbers Private Function ETForGreaterThan(ByVal query As IQueryable(Of T), ByVal propertyValue As Object, ByVal propertyInfo As PropertyInfo) As IQueryable(Of T) Dim e As ParameterExpression = Expression.Parameter(GetType(T), "e") Dim m As MemberExpression = Expression.MakeMemberAccess(e, propertyInfo) Dim c As ConstantExpression = Expression.Constant(propertyValue, propertyValue.GetType()) Dim b As BinaryExpression = Expression.GreaterThan(m, c) Dim lambda As Expression(Of Func(Of T, Boolean)) = Expression.Lambda(Of Func(Of T, Boolean))(b, e) Return query.Where(lambda) End Function It works fine and is consumed in this way query = ETForGreaterThan(query, Value, propertyInfo) As you can see, I give it an IQueryable collection and it add a where clause to it, base on a property and a value. Y can construct Lessthan, LessOrEqualThan etc equivalents as Expression has this operators predefined. ¿How can I transform this code to do the same with strings? Expression don't give me a predefined operator like "contains" or "startwith" and I'm really noob with Expression trees. Thanks, and please Post your answer in C#/VB. Choose the one that make you feel more confortable.

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  • Cast object as OleVariant in Delphi

    - by Alan Clark
    Is there a way to pass a wrap and unwrap a TObject descendent in an OleVariant? I am trying to pass a TObject across automation objects. I know it's not a good idea but I don't have a good alternative. Something like this: function GetMyObjAsVariant; var MyObj: TMyObj; begin MyObj := TMyObj.Create; result := OleVariant(MyObj); end; Which would be used by a client as var MyObj: TMyObj; begin MyObj := GetMyObjAsVariant as TMyObj; end; This fails to compile, returning E2015 Operator not applicable to this operand type.

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  • Sending E-mail from the client

    - by peterpan764
    hi guys i need some help the vb.net. my problem is that i have got an formular with "name" "password" "e-mail" and some other.... i want that the client file in his for example name and i want to recieve an e-mail at my e-emil acc. Can somebody help my please?

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  • What is the best solution to replace a new memory allocator in an existing code?

    - by O. Askari
    During the last few days I've gained some information about memory allocators other than the standard malloc(). There are some implementations that seem to be much better than malloc() for applications with many threads. For example it seems that tcmalloc and ptmalloc have better performance. I have a C++ application that uses both malloc and new operators in many places. I thought replacing them with something like ptmalloc may improve its performance. But I wonder how does the new operator act when used in C++ application that runs on Linux? Does it use the standard behavior of malloc or something else? What is the best way to replace the new memory allocator with the old one in the code? Is there any way to override the behavior or new and malloc or do I need to replace all the calls to them one by one?

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  • best book to start XML and Html5?

    - by asad26
    hey every one can some one help that , how can start XML and Html and what i have to start first and what steps should I take , and because I know Objective c as iphone programmer but i what to know more about web base application so please some one help me with steps should I take and as beginner? thanks

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  • summer training

    - by rohit-garg
    hi i wanna make a retail store software for my family retail store .... can anyone help me out with which language to use and just give me some basic ideas I'm an engineering student and have good knowledge of ASP, HTML, CSS, VBSCRIPT and have gone through java , c ,c++. please help me anyone

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  • View state is not getting in the Page PreInit event

    - by Jibu P C_Adoor
    Hii,, I need a help. I have a master page and i am changing the masterpage file property to some other master page dynamically in the page PreInit event and that changing url is taken from a viewstate. but the view state is not getting in the pre init event. If you finding any solution regarding this pls help me....

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  • Any way to make a generic List where I can add a type AND a subtype?

    - by user383178
    I understand why I cannot do the following: private class Parent { }; private class Child extends Parent { }; private class GrandChild extends Child { }; public void wontCompile(List<? extends Parent> genericList, Child itemToAdd) { genericList.add(itemToAdd); } My question is there ANY practical way to have a typesafe List where you can call add(E) where E is known to be only a Parent or a Child? I vaguely remember some use of the "|" operator as used for wildcard bounds, but I cannot find it in the spec... Thanks!

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  • C++ / Java: Toggle boolean statement?

    - by Martijn Courteaux
    Hi, Is there a short way to toggle a boolean? With integers we can do operations like this: int i = 4; i *= 4; // equals 16 /* Which is equivalent to */ i = i * 4; So is there also something for booleans (like the *= operator for ints)? In C++: bool booleanWithAVeryLongName = true; booleanWithAVeryLongName = !booleanWithAVeryLongName; // Can it shorter? booleanWithAVeryLongName !=; // Or something? In Java: boolean booleanWithAVeryLongName = true; booleanWithAVeryLongName = !booleanWithAVeryLongName; // Can it shorter? booleanWithAVeryLongName !=; // Or something?

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  • Best way to validate currency input?

    - by Abe Miessler
    I have created the TextBox and CompareValidator below which I thought would allow input in the following forms: 5 5.00 $5.00 Unfortunately it's not allowing the version with the dollar sign in it. What is the point of doing a type check against currency if you don't allow the dollar sign? Is there a way to allow this symbol? <asp:TextBox ID="tb_CostShare" runat="server" Text='<%# Eval("CostShare", "{0:$0.00}")%>' CausesValidation="true" /> <asp:CompareValidator ID="vld_CostShare" runat="server" ControlToValidate="tb_CostShare" Operator="DataTypeCheck" Type="Currency" ValidationGroup="vld" ErrorMessage="You must enter a dollar amount for 'Cost Share'." />

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  • Is call to function object inlined?

    - by dehmann
    In the following code, Foo::add calls a function via a function object: struct Plus { inline int operator()(int x, int y) const { return x + y; } }; template<class Fct> struct Foo { Fct fct; Foo(Fct f) : fct(f) {} inline int add(int x, int y) { return fct(x,y); // same efficiency adding directly? } }; Is this the same efficiency as calling x+y directly in Foo::add? In other words, does the compiler typically directly replace fct(x,y) with the actual call, inlining the code, when compiling with optimizations enabled?

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  • JavaScript eval() with `this`

    - by mojuba
    If I define a JavaScript code snippet in my HTML, like so: <div id=myElem onMyUpdate="alert('Update called for ' + this.id)">... then what is the most elegant way of evaluating it from within JavaScript with this properly assigned? What I came up with so far is something like this: if (elem.hasAttribute('onMyUpdate')) (function () { eval(elem.getAttribute('onMyUpdate')) }).call(elem); which looks terrible (to me), but works. Any better/more elegant alternatives? MDN says there used to be the second argument to eval() for doing just that but it's deprecated now; MDN then suggests to use operator with() instead, which, if you follow the link provided, turns out to be made deprecated by the latest standard. Dead end, in other words. (As a side note, StackOverflow ignores the word this in search terms and thus it may miss relevant answers - is there a way of telling it not to?) Edit: I forgot to mention: no jQuery please, just vanilla JavaScript

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  • How to retrieve all keys (or values) from a std::map?

    - by Owen
    This is one of the possible ways I come out: struct RetrieveKey { template <typename T> typename T::first_type operator()(T keyValuePair) const { return keyValuePair.first; } }; map<int, int> m; vector<int> keys; // Retrieve all keys transform(m.begin(), m.end(), back_inserter(keys), RetrieveKey()); // Dump all keys copy(keys.begin(), keys.end(), ostream_iterator<int>(cout, "\n")); Of course, we can also retrieve all values from the map by defining another functor RetrieveValues. Is there any other way to achieve this easily? (I'm always wondering why std::map does not include a member function for us to do so.)

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