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Search found 43 results on 2 pages for 'vincenzo'.

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• how to calculate a difference between two Zend_Date objects, in months

  - by Vincenzo

  I have two objects of Zend_Date class and I want to calculate the difference between them in full calendar months.. How can I do this? <?php $d1 = new Zend_Date('1 Jan 2008'); $d2 = new Zend_Date('1 Feb 2010'); $months = $d1->sub($d2)->get(Zend_Date::MONTH); assert($months == -25); // failure here Thanks in advance!

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• why my C++ output executable is so big?

  - by Vincenzo

  I have a rather simple C++ project, which uses boost::regex library. The output I'm getting is 3.5Mb in size. As I understand I'm statically linking all boost .CPP files, including all functions/methods. Maybe it's possible somehow to instruct my linker to use only necessary elements from boost, not all of them? Thanks.

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• how to use replace_regex_copy() from boost::algorithm library?

  - by Vincenzo

  This is my code: #include <string> #include <boost/algorithm/string/regex.hpp> string f(const string& s) { using namespace boost::algorithm; return replace_regex_copy(s, "\\w", "?"); } This is what compiler says: no matching function for call to ‘replace_regex_copy(const std::basic_string<char, std::char_traits<char>, std::allocator<char> >&, std::string, std::string) The link to the library: http://www.boost.org/doc/libs/1_43_0/doc/html/boost/algorithm/replace_regex_copy.html Could anyone please help? Thanks! ps. Boost library is in place, since other functions from it work fine.

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• How to implement fluent interface with a base class, in C++

  - by Vincenzo

  How can I implement this fluent interface in C++: class Base { public: Base& add(int x) { return *this; } } class Derived : public Base { public: Derived& minus(int x) { return *this; } } Derived d; d.add(1).minus(2).add(3).minus(4); Current code doesn't work since Base class doesn't know anything about Derived class, etc. I would be very thankful for a hint/suggestion.

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• memory leak in Zend_Db_Table_Row?

  - by Vincenzo

  This is the code I have: <?php $start = memory_get_usage(); $table = new Zend_Db_Table('user'); for ($i = 0; $i < 5; $i++) { $row = $table->createRow(); $row->name = 'Test ' . $i; $row->save(); unset($row); echo (memory_get_usage() - $start) . "\n"; } This is what I see: 90664 93384 96056 98728 101400 Isn't it a memory leak? When I have 500 objects to insert into DB in one script I'm getting memory overflow. Can anyone help?

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• How to discard const in c++

  - by Vincenzo

  This is what I'm trying to do and I can't: #include <string> using namespace std; class A { bool has() const { return get().length(); } string& get() { return s; } private: string s; }; The error I'm getting is: passing ‘const A’ as ‘this’ argument of ‘std::string& A::get()’ discards qualifiers I understand what the problem is, but how can I fix it? I really need has() to be const. Thanks.

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• How to get proper text name of typeid()

  - by Vincenzo

  My code: namespace test { class MyTest { }; } MyTest a; cout << typeid(a).name(); This is what I see (i686-apple-darwin10-gcc-4.2.1 (GCC) 4.2.1 (Apple Inc. build 5659)): N4test6MyTestE Is there any platform-independent way to get something like test::MyTest instead of this string?

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• 42S22 SQL error: Column not found, why?

  - by Vincenzo

  This is my SQL: SELECT `tbl`.*, 123 AS `test` FROM `tbl` GROUP BY `test` It works when I run it directly in MySQL. But PDO says: SQLSTATE[42S22]: Column not found: 1054 Unknown column 'test' in 'field list' Why so? How to cure this problem? I'm using Zend_Db.

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• Can't compile std::map sorting, why?

  - by Vincenzo

  This is my code: map<string, int> errs; struct Compare { bool operator() (map<string, int>::const_iterator l, map<string, int>::const_iterator r) { return ((*l).second < (*r).second); } } comp; sort(errs.begin(), errs.end(), comp); Can't compile. This is what I'm getting: no matching function for call to ‘sort(..’ Why so? Can anyone help? Thanks!

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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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• How to compare two vectors, in C++

  - by Vincenzo

  This is my code: #include <algorithm> void f() { int[] a = {1, 2, 3, 4}; int[] b = {1, 2, 100, 101}; // I want to do something like this: // int* found = compare(a[0], a[3], b[0]); // in order to get a pointer to a[2] } Maybe I missed this algorithm in the manual… Please help :)

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• MySQL VIEW vs. embedded query, which one is faster?

  - by Vincenzo

  I'm going to optimize a MySQL embedded query with a view, but I'm not sure whether it will give an effect: SELECT id FROM (SELECT * FROM t); I want to convert it to: CREATE VIEW v AS SELECT * FROM t; SELECT id FROM v; I've heard about "indexed views" in SQL Server, but I'm not sure about MySQL. Any help would be appreciated. Thanks!

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• How to find whether an element exists in std::map?

  - by Vincenzo

  My use case: map<string, Car> cars; bool exists(const string& name) { // somehow I should find whether my MAP has a car // with the name provided return false; } Could you please suggest the best and the most elegant way to do it in C++? Thanks.

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• can't compile min_element in c++

  - by Vincenzo

  This is my code: #include <algorithm> #include <vector> #include <string> using namespace std; class A { struct CompareMe { bool operator() (const string*& s1, const string*& s2) const { return true; } }; void f() { CompareMe comp; vector<string*> v; min_element(v.begin(), v.end(), comp); } }; And this is the error: error: no match for call to ‘(A::CompareMe) (std::string*&, std::string*&)’ test.cpp:7: note: candidates are: bool A::CompareMe::operator()(const std::string*&, const std::string*&) const I feel that there is some syntax defect, but can't find out which one. Please, help!

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• How to check the type name of an object in derived classes?

  - by Vincenzo

  This is my code: class Base { /* something */ }; class Derived : public Base { /* something */ }; vector<Base*> v; // somebody else initializes it, somewhere int counter = 0; for (vector<Base*>::iterator i=v.begin(); i!=v.end(); ++i) { if (typeof(*i) == "Derived") { // this line is NOT correct counter++; } } cout << "Found " << counter << " derived classes"; One line in the code is NOT correct. How should I write it properly? Many thanks in advance!

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• How to pass array to function without variable instantiation, in C++

  - by Vincenzo

  Can I do this in C++ (if yes, what is the syntax?): void func(string* strs) { // do something } func({"abc", "cde"}); I want to pass an array to function, without instantiating it as a variable. Thanks for suggestions.

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• what happens with memory when I throw an exception?

  - by Vincenzo

  This is the code (just a simplification of a real problem): <?php echo memory_get_usage() . "\n"; function f() { throw new Exception(); } function foo() { try { f(); } catch (Exception $e) { } } foo(); echo memory_get_usage() . "\n"; This is the output (PHP 5.3): 630680 630848 What happened with memory (168 bytes lost)? The exception object is not destroyed? Please, help! Thanks

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• Java & android: Help linking an item in a listView to its correct view, but not the way i know of.

  - by Capsud

  Hi, i'm developing an android app, and what i have is a String array of restaurants in one class... static final String[] AtoZ = new String[] { "Ananda", "Brambles Cafe", "Brannigans", "Buona Sera", "Cafe Mao", "Cafe Mimo", "Dante", "Eddie Rockets", "Frango's World Cuisine", "Nando's", "Overends Restaurant @ Airfield House", "Pizza Hut", "Roly Saul", "Siam Thai","Smokey Joes","Sohag Tandoori", "TGI Friday","The Rockfield Lounge", "Winters Bar", "Al Boschetto","Baan Thai", "Bella Cuba", "Bellamys","Bianconis","Canal Bank Cafe", "Canalettos Restaurant","Chandni Restaurant", "Chill Out Cafe", "Crowes", "Da Vincenzo", "Druids", "Dylan", "Epic Restaurant", "Jewel in the Crown", "Juniors", "Kanum Thai","Kites", "Koishi","Maia Restaurant", "Mangetu Restaurant", "Millers Pizza Kitchens", "O'Connells Restaurant", "Ocras Restaurant", "Orchid Szechuan Restaurant", "Roly's Bistro", "Ryans Beggars Bush", }; i have created a view for each of these restaurants aswell in my layouts folder. so this array is going to be displayed in a listView in my android app. What i want to know is what is the quickest way of linking the item clicked to its correct view, without having to type out each position in the array and have a serious of if statements which would take a year with this! i dont want to be doing something like this if(position == 1){ setContentView(R.layout.bentleys); as it would take a year doing that for each one... Please help. thanks alot.

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