ambiguity

问题 I want to fill out this form using Python: <form method="post" enctype="multipart/form-data" id="uploadimage"> <input type="file" name="image" id="image" /> <input type="submit" name="button" id="button" value="Upload File" class="inputbuttons" /> <input name="newimage" type="hidden" id="image" value="1" /> <input name="path" type="hidden" id="imagepath" value="/var/www/httpdocs/images/" /> </form> As you can see, there are two Parameters that are named exactly the same, so when I'm using

问题 I would like to know, if this is a bug or behavior, that is intended by the inventor. Here I have a minimal example of a dypgen grammar: { open Parse_tree let dyp_merge = Dyp.keep_all } %start main %layout [' ' '\t'] %% main: | a "\n" { $1 } a: | ms b { Mt ($1,$2) } | b <Mt(_,_)> kon1 b { Koo ($1, $2, $3) } | b <Mt(_,_)> kon2 b { Koo ($1, $2, $3) } | b { $1 } b: | k { $1 } | ns b { Nt ($1,$2) } /* If you comment this line out, it will work with the permutation, but I need the 'n' ! */ /* | b

问题 A client of ours reported that when trying to use our .NET .DLL in VB.NET they receive the error: error BC31429: 'OurClass' is ambiguous because multiple kinds of members with this name exist in namespace 'our.company.nspace' I've also been able to reproduce the error with a dummy project containing the single line of Dim x as our.company.nspace.OurClass Normally this is because there are several types with names differing only in case. But in this case there is no such ambiguity. OurClass is

问题 I have the following code written in ANTLRWorks 1.4 grammar hmm; s : (put_a_in_b)|(put_out_a)|(drop_kick)|(drop_a)|(put_on_a); put_a_in_b : (PUT_SYN)(ID)(IN_SYN)(ID); put_out_a : (PUT2_SYN)(OUT_SYN)(ID) | (E1)(ID); drop_kick : ('drop')('kick')(ID); drop_a : (DROP_SYN)(ID); put_on_a : (E2)(ID); PUT_SYN : 'put' | 'place' | 'drop'; PUT2_SYN : 'put' | 'douse'; IN_SYN : 'in' | 'into' | 'inside' | 'within'; OUT_SYN : 'out'; E1 : 'extinguish'|'douse'; DROP_SYN : 'drop' | 'throw' | 'relinquish'; WS :

问题 I'm going to bootstrap this question with a previous one I asked: LINQ to SQL: Multiple joins ON multiple Columns. Is this possible? So I have a LINQ query: var query = from t1 in myTABLE1List // List<TABLE_1> join t2 in myTABLE1List on new { t1.ColumnA, t1.ColumnB } equals new { t2.ColumnA, t2.ColumnB } join t3 in myTABLE1List on new { t2.ColumnA, t2.ColumnB } equals new { t3.ColumnA, t3.ColumnB } select new {t1.ColumnA, t2.ColumnA, t3.ColumnA } // Duplicate Anon type 'ColumnA' How can I

问题 I hope the title actually describes what I wanted to ask... I wrote a piece of code that compiles with gcc and works as I intended. However, it does not compile with llvm and the code executes differently when compiled with icc! Here is an example of the problem: #include <iostream> using std::cout; using std::endl; class A { public: virtual void foo() { cout << "A::foo()" << endl; } }; class B : public A { public: typedef A base; virtual void foo() { cout << "B::foo()" << endl; } }; int main

问题 Maybe I've been staring at this problem for too long, maybe there isn't an answer; either way I'm here now. I'm trying to permit a set of possible combinations in an XSD, but I can't seem to find an approach that doesn't result in ambiguity. Quick regexy respresentation: foo+ ( bar baz* | bar? baz+ qux* ) foo is required ( one-or-more ) If bar exists, baz is optional ( zero-or-more ) If baz exists, bar is optional ( zero-or-one ) and qux is optional ( zero-or-more ) qux can not exist if baz

问题 Forgive me, for I am fairly new to C++, but I am having some trouble regarding operator ambiguity. I think it is compiler-specific, for the code compiled on my desktop. However, it fails to compile on my laptop. I think I know what's going wrong, but I don't see an elegant way around it. Please let me know if I am making an obvious mistake. Anyhow, here's what I'm trying to do: I have made my own vector class called Vector4 which looks something like this: class Vector4 { private: GLfloat

问题 Consider the following snippet: void Foo() // 1 { } namespace { void Foo() // 2 { } } int main() { Foo(); // Ambiguous. ::Foo(); // Calls the Foo in the global namespace (Foo #1). // I'm trying to call the `Foo` that's defined in the anonymous namespace (Foo #2). } How can I refer to something inside an anonymous namespace in this case? 回答1: You can't. The standard contains the following section ( §7.3.1.1 , C++03): An unnamed-namespace-definition behaves as if it were replaced by namespace

问题 I wanted a Django model with 2 foreign keys from the same table. It's an event table which has 2 columns for employees: the 'actor' and the 'receiver'. But I get this error: Error: One or more models did not validate: tasks.task: Intermediary model TaskEvent has more than one foreign key to Employee, which is ambiguous and is not permitted. Is there a better way to model this? Thanks I think I'm going to add a TaskEvent_to_Employee table. There will be two records in it, one for each of the