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• PHP arrays. There must be a simpler method to do this

  - by RisingSun

  I have this array in php returned from db Array ( [inv_templates] = Array ( [0] = Array ( [inven_subgroup_template_id] = 1 [inven_group] = Wires [inven_subgroup] = CopperWires [inven_template_id] = 1 [inven_template_name] = CopperWires6G [constrained] = 0 [value_constraints] = [accept_range] = 2 - 16 [information] = Measured Manual ) [1] = Array ( [inven_subgroup_template_id] = 1 [inven_group] = Wires [inven_subgroup] = CopperWires [inven_template_id] = 2 [inven_template_name] = CopperWires2G [constrained] = 0 [value_constraints] = [accept_range] = 1 - 7 [information] = Measured by Automated Calipers ) ) ) I need to output this kind of multidimensional stuff Array ( [Wires] = Array ( [inv_group_name] = Wires [inv_subgroups] = Array ( [CopperWires] = Array ( [inv_subgroup_id] = 1 [inv_subgroup_name] = CopperWires [inv_templates] = Array ( [CopperWires6G] = Array ( [inv_name] = CopperWires6G [inv_id] = 1 ) [CopperWires2G] = Array ( [inv_name] = CopperWires2G [inv_id] = 2 ) ) ) ) ) ) I currently do this stuff foreach ($data['inv_templates'] as $key = $value) { $processeddata[$value['inven_group']]['inv_group_name'] = $value['inven_group']; $processeddata[$value['inven_group']]['inv_subgroups'][$value['inven_subgroup']]['inv_subgroup_id'] = $value['inven_subgroup_template_id']; $processeddata[$value['inven_group']]['inv_subgroups'][$value['inven_subgroup']]['inv_subgroup_name'] = $value['inven_subgroup']; $processeddata[$value['inven_group']]['inv_subgroups'][$value['inven_subgroup']]['inv_templates'][$value['inven_template_name']]['inv_name'] = $value['inven_template_name']; $processeddata[$value['inven_group']]['inv_subgroups'][$value['inven_subgroup']]['inv_templates'][$value['inven_template_name']]['inv_id'] = $value['inven_template_id']; } return $processeddata; EDIT : A var_export array ( 'inv_templates' = array ( 0 = array ( 'inven_subgroup_template_id' = '1', 'inven_group' = 'Wires', 'inven_subgroup' = 'CopperWires', 'inven_template_id' = '1', 'inven_template_name' = 'CopperWires6G', 'constrained' = '0', 'value_constraints' = '', 'accept_range' = '2 - 16', 'information' = 'Measured Manual', ), 1 = array ( 'inven_subgroup_template_id' = '1', 'inven_group' = 'Wires', 'inven_subgroup' = 'CopperWires', 'inven_template_id' = '2', 'inven_template_name' = 'CopperWires6G', 'constrained' = '0', 'value_constraints' = '', 'accept_range' = '1 - 7', 'information' = 'Measured by Automated Calipers', ), ), ) The foreach is almost unreadable. There must be a simpler way

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• How to pass a class method as an argument for another function in C++ and openGL?

  - by tsubasa

  I know this thing works: void myDisplay() { ... } int main() { ... glutDisplayFunc(myDisplay) ... } so I tried to include myDisplay() function to a class that I made. Because I want to overload it in the future with a different class. However, the compiler complains that argument of type 'void (ClassBlah::)()' does not match 'void(*)()' . Here is the what I try to make: class ClassBlah { .... void myDisplay() .... } ...... int main() { ... ClassBlah blah glutDisplayFunc(blah.myDisplay) ... } Does anybody knows how to fix this problem? Many thanks.

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• What is the best method of assessment for computer science students?

  - by Gavimoss

  This question is a bit more philosophical so feel free to remove if you like but it's been bugging me for the last 4 years! As a final year student I find that exams can be often be passed with a couple of days of cramming, without necessarily retaining or understanding the content i.e. a regurgitation of lecture notes is often enough to gain high marks. A friend of mine is about to graduate with an honours degree whose final year evaluation was based solely on practical work (a project, assignment marks and the creation of a poster) yet all of this work could have been completed by a third party. Personally I don't think either of these methods of assessment is sufficient as I am currently on track for a 1st class honours in artificial intelligence and computer science and believe this is mostly due to my skill in passing exams not my skill as a programmer or my vast in depth knowledge of any of the subjects I have "studied". Surely there is a better way to assess our skills - isn't there?

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• python mock patch : a method of instance is called?

  - by JuanPablo

  In python 2.7, I have this function from slacker import Slacker def post_message(token, channel, message): channel = '#{}'.format(channel) slack = Slacker(token) slack.chat.post_message(channel, message) with mock and patch, I can check that the token is used in Slacker class import unittest from mock import patch from slacker_cli import post_message class TestMessage(unittest.TestCase): @patch('slacker_cli.Slacker') def test_post_message_use_token(self, mock_slacker): token = 'aaa' channel = 'channel_name' message = 'message string' post_message(token, channel, message) mock_slacker.assert_called_with(token) how I can check the string use in post_message ? I try with mock_slacker.chat.post_message.assert_called_with('#channel') but I get AssertionError: Expected call: post_message('#channel') Not called

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• what is the best method of concatenating a series of binary files into one file?

  - by Andrew

  hello everyone i have a series of PDF byte arrays in a arraylist files that i wish to concatenate into one file, currently when the PDF application trys to open the file is it corrupted: foreach (byte[] array in files) { using (Stream s = new MemoryStream(downloadbytes)) { s.Write(array, 0, array.Length); } } downloadbytes is the resultant concatenated array of bytes below is another implementation which also failed foreach (byte[] array in files) { System.Buffer.BlockCopy(array, 0, downloadbytes, offset, array.Length); offset += array.Length; } any pointers?

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• how to structure code that uses std::rel_ops

  - by R Samuel Klatchko

  I was working on some code and wanted to make use of std::rel_ops. From what I can tell, you need to do using std::rel_ops to your source code to make use of them. But I'm not sure where the best place to put that is. Let's say I have a header file with a class that only defines the minimal operator== and operator<: // foo.h class foo { public: bool operator==(const foo &other) const; bool operator<(const foo &other) const; }; I'm not sure where to put using std::rel_ops. If I leave it out of the foo.h, then every user of foo.h needs to know the implementation detail that foo is not defining all the operators itself. But putting using std::rel_ops inside foo.h breaks the rule of thumb about not having a using in a header file. How do other people resolve this issue?

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• Is there any extension method which get void returning lamda expression ?

  - by Freshblood

  For example int[] Array = { 1, 23, 4, 5, 3, 3, 232, 32, }; Array.JustDo(x => Console.WriteLine(x));

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• how to call the chart in excel using poi method?

  - by Zen

  i have an excel template and there was a chart there, I was confuse on how can I call that chart when I'm coding in vb.net.. Can anyone help me on how can I call the chart for me to set the new value to fill the chart.. It is possible to call?

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• Is there a method / system / program to keep track of diffirent stages and changes in writing the co

  - by Luay

  forgive me, but I don't know the technical term to know what to search for. I am trying to find a way to keep track of changes in my code during the development of my program. something that would allow me to go back to a section of code that I deleted. I am not talking about "undo". But rather a way that would let me keep track or be able to retrieve a section of my code that I deleted but now want it back. Is there such a way. If there is, then what is this whole system/procedure called? Is there something that integrates with visual studio 2010? Many thanks for your help.

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• Why checking out working copy with svn:// access method, with 127.0.0.1 fails , but,with localhost w

  - by Banani

  Hi!, I have setup svnserve server (1.6.5,plain, without apache) on Fedora. I start the svnserve with the command 'svnserve -d --foreground --listen-port=3690 -r /usr/local/svn-repos/proj-test' When user trying to checkout working copy from the local machine with command 'svn checkout svn://127.0.0.1/proj-test' gets following error svn: URL 'svn://127.0.0.1/proj-test' doesn't exists but, 'svn checkout svn://localhost/proj-test' works. I am curious to know why using 127.0.0.1 with svn:// fails? Thanks. Banani

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• Why isn't the @Deprecated annotation triggering a compiler warning about a method?

  - by Scooter

  I am trying to use the @Deprecated annotation. The @Deprecated documentation says that: "Compilers warn when a deprecated program element is used or overridden in non-deprecated code". I would think this should trigger it, but it did not. javac version 1.7.0_09 and compiled using and not using -Xlint and -deprecation. public class test_annotations { public static void main(String[] args) { test_annotations theApp = new test_annotations(); theApp.this_is_deprecated(); } @Deprecated public void this_is_deprecated() { System.out.println("doing it the old way"); } }

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• "Forced constness" in std::map<std::vector<int>,double> > ?

  - by Peter Jansson

  Consider this program: #include <map> #include <vector> typedef std::vector<int> IntVector; typedef std::map<IntVector,double> Map; void foo(Map& m,const IntVector& v) { Map::iterator i = m.find(v); i->first.push_back(10); }; int main() { Map m; IntVector v(10,10); foo(m,v); return 0; } Using g++ 4.4.0, I get his compilation error: test.cpp: In function 'void foo(Map&, const IntVector&)': test.cpp:8: error: passing 'const std::vector<int, std::allocator<int> >' as 'this' argument of 'void std::vector<_Tp, _Alloc>::push_back(const _Tp&) [with _Tp = int, _Alloc = std::allocator<int>]' discards qualifiers I would expect this error if I was using Map::const_iterator inside foo but not using a non-const iterator. What am I missing, why do I get this error?

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• What have you learned from your students?

  - by Helper Method

  It is said that a true master learns from his students. Since I'm tutoring at university, from time to time a question or a comment from the students I'm working with made me to see something from a different perspective, you get deeper insights, etc. So, what have you learned from your students/junior developers/... ?

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• Is this linear search implementation actually useful?

  - by Helper Method

  In Matters Computational I found this interesting linear search implementation (it's actually my Java implementation ;-)): public static int linearSearch(int[] a, int key) { int high = a.length - 1; int tmp = a[high]; // put a sentinel at the end of the array a[high] = key; int i = 0; while (a[i] != key) { i++; } // restore original value a[high] = tmp; if (i == high && key != tmp) { return NOT_CONTAINED; } return i; } It basically uses a sentinel, which is the searched for value, so that you always find the value and don't have to check for array boundaries. The last element is stored in a temp variable, and then the sentinel is placed at the last position. When the value is found (remember, it is always found due to the sentinel), the original element is restored and the index is checked if it represents the last index and is unequal to the searched for value. If that's the case, -1 (NOT_CONTAINED) is returned, otherwise the index. While I found this implementation really clever, I wonder if it is actually useful. For small arrays, it seems to be always slower, and for large arrays it only seems to be faster when the value is not found. Any ideas?

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• package private static member class vs. package private class

  - by Helper Method

  I was writing two implementations of a linked list for an assignment, a doubly linked list and a circular doubly linked list. Now as the class representing a Link within the linked list is the same in both implementations, I want to use it in both. Now I wonder which approach would be better: Implement the Link class as a package private static member class in the first implementation and then use this class in the second implementation or make the Link class a package private class.

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• Using Linq-To-SQL I'm getting some weird behavior doing text searches with the .Contains method. Loo

  - by Nate Bross

  I have a table, where I need to do a case insensitive search on a text field. If I run this query in LinqPad directly on my database, it works as expected Table.Where(tbl => tbl.Title.Contains("StringWithAnyCase")) // also, adding in the same constraints I'm using in my repository works in LinqPad // Table.Where(tbl => tbl.Title.Contains("StringWithAnyCase") && tbl.IsActive == true) In my application, I've got a repository which exposes IQueryable objects which does some initial filtering and it looks like this var dc = new MyDataContext(); public IQueryable<Table> GetAllTables() { var ret = dc.Tables.Where(t => t.IsActive == true); return ret; } In the controller (its an MVC app) I use code like this in an attempt to mimic the LinqPad query: var rpo = new RepositoryOfTable(); var tables = rpo.GetAllTables(); // for some reason, this does a CASE SENSITIVE search which is NOT what I want. tables = tables.Where(tbl => tbl.Title.Contains("StringWithAnyCase"); return View(tables); The column is defiend as an nvarchar(50) in SQL Server 2008. Any help or guidance is greatly appreciated!

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• Error building QtDeclarative with Qt 4.6.2 on Mac OS X

  - by Viet

  I tried hard to build QtDeclarative with Qt 4.6.2 on Mac OS X (Leopard) and did lots of Googling without finding any cure. Could anyone please help to solve this problem? Thanks. Here goes the error: Undefined symbols: "QObjectPrivate::isSignalConnected(int) const", referenced from: QmlGraphicsKeysAttachedPrivate::isConnected(char const*)in qmlgraphicsitem.o QmlGraphicsMouseRegionPrivate::isConnected(char const*)in qmlgraphicsmouseregion.o ld: symbol(s) not found collect2: ld returned 1 exit status make: *** [.obj/QtDeclarative.framework/QtDeclarative] Error 1

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• Class<T> and static method Class.forName() drive me crazy.

  - by matt

  Hi, this code doesn't compile. I'm wondering what I am doing wrong: private static Importable getRightInstance(String s) throws Exception { Class<Importable> c = Class.forName(s); Importable i = c.newInstance(); return i; } where Importable is an interface and the string s is the name of an implementing class. The compiler says: ./Importer.java:33: incompatible types found : java.lang.Class<capture#964 of ?> required: java.lang.Class<Importable> Class<Importable> c = Class.forName(format(s)); thanks for any help! All the solutions Class<? extends Importable> c = Class.forName(s).asSubclass(Importable.class); and Class<? extends Importable> c = (Class<? extends Importable>) Class.forName(s); and Class<?> c = Class.forName(format(s)); Importable i = (Importable)c.newInstance(); give this error: Exception in thread "main" java.lang.IncompatibleClassChangeError: class C1 has interface Importable as super class where C1 is effectively a class implementing Importable, one of those i want to cast to Importable.

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• C++ stream as a parameter when overloading operator<<

  - by TheOm3ga

  I'm trying to write my own logging class and use it as a stream: logger L; L << "whatever" << std::endl; This is the code I started with: #include <iostream> using namespace std; class logger{ public: template <typename T> friend logger& operator <<(logger& log, const T& value); }; template <typename T> logger& operator <<(logger& log, T const & value) { // Here I'd output the values to a file and stdout, etc. cout << value; return log; } int main(int argc, char *argv[]) { logger L; L << "hello" << '\n' ; // This works L << "bye" << "alo" << endl; // This doesn't work return 0; } But I was getting an error when trying to compile, saying that there was no definition for operator<<: pruebaLog.cpp:31: error: no match for ‘operator<<’ in ‘operator<< [with T = char [4]](((logger&)((logger*)operator<< [with T = char [4]](((logger&)(& L)), ((const char (&)[4])"bye")))), ((const char (&)[4])"alo")) << std::endl’ So, I've been trying to overload operator<< to accept this kind of streams, but it's driving me mad. I don't know how to do it. I've been loking at, for instance, the definition of std::endl at the ostream header file and written a function with this header: logger& operator <<(logger& log, const basic_ostream<char,char_traits<char> >& (*s)(basic_ostream<char,char_traits<char> >&)) But no luck. I've tried the same using templates instead of directly using char, and also tried simply using "const ostream& os", and nothing. Another thing that bugs me is that, in the error output, the first argument for operator<< changes, sometimes it's a reference to a pointer, sometimes looks like a double reference...

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• Is there a better method for scrolling a page (with jQuery) in Safari for iPhone (scrollTop doesn't

  - by Keeron

  Hi there, I am working on an iPhone version of a website, and I am using jQuery .animate() with the scrollTop attribute to scroll to different sections of the page. Something like so: $('html,body').animate({ scrollTop: distance }, 300); On regular web browsers, the scrolling starts from the current window position to the desired position. On the iPhone, the window jumps back to the top of the document before scrolling to the desired position. This is apparently the intended action, but the pages just don't look good with all that movement. Alternatively, on Google.com for the iPhone, when the autosuggest is activated, there is a nice simple scroll to show the autosuggest options below the search box. That's what I'd like to do...

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• C++ Word-Number to int

  - by Andrew

  I'm developing a program that makes basic calculations using words instead of numbers. E.g. five + two would output seven. The program becomes more complex, taking input such as two_hundred_one + five_thousand_six (201 + 5006) Through operator overloading methods, I split each number and assign it to it's own array index. two would be [0], hundred is [1], and one is [2]. Then the array recycles for 5006. My problem is, to perform the actual calculation, I need to convert the words stored in the array to actual integers. I have const string arrays such as this as a library of the words: const string units[] = { "", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine" }; const string teens[] = { "ten", "eleven", "twelve", "thirteen", "fourteen", "fifteen", "sixteen", "seventeen", "eighteen", "nineteen" }; const string tens[] = { "", "", "twenty", "thirty", "forty", "fifty", "sixty", "seventy", "eighty", "ninety" }; If my 'token' array has stored in it two hundred one in index 0, 1, and 2, I'm not sure what the best way to convert these to ints would involve.

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• Is it true that in most Object Oriented Programming Languages, an "i" in an instance method always r

  - by Jian Lin

  In the following code: <script type="text/javascript"> var i = 10; function Circle(radius) { this.r = radius; this.i = radius; } Circle.i = 123; Circle.prototype.area = function() { alert(i); } var c = new Circle(1); var a = c.area(); </script> What is being alerted? The answer is at the end of this question. I found that the i in the alert call either refers to any local (if any), or the global variable. There is no way that it can be the instance variable or the class variable even when there is no local and no global defined. To refer to the instance variable i, we need this.i, and to the class variable i, we need Circle.i. Is this actually true for almost all Object oriented programming languages? Any exception? Are there cases that when there is no local and no global, it will look up the instance variable and then the class variable scope? (or in this case, are those called scope?) the answer is: 10 is being alerted.

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• Unicode version of base64 encoding/ decoding

  - by Yan Cheng CHEOK

  I am using base64 encoding/decoding from http://www.adp-gmbh.ch/cpp/common/base64.html It works pretty well with the following code. const std::string s = "I Am A Big Fat Cat" ; std::string encoded = base64_encode(reinterpret_cast<const unsigned char*>(s.c_str()), s.length()); std::string decoded = base64_decode(encoded); std::cout << _T("encoded: ") << encoded << std::endl; std::cout << _T("decoded: ") << decoded << std::endl; However, when comes to unicode namespace std { #ifdef _UNICODE typedef wstring tstring; #else typedef string tstring; #endif } const std::tstring s = _T("I Am A Big Fat Cat"); How can I still make use of the above function? Merely changing std::string base64_encode(unsigned TCHAR const* , unsigned int len); std::tstring base64_decode(std::string const& s); will not work correctly. (I expect base64_encode to return ASCII. Hence, std::string should be used instead of std::tstring)

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• Best ways to write a method that updates two objects in a multithreaded java environment?

  - by DanielHonig

  Suppose we have a class called AccountService that manages the state of accounts. AccountService is defined as interface AccountService{ public void debit(account); public void credit(account); public void transfer(Account account, Account account1); } Given this definition, what is the best way to implement transfer() so that you can guarantee that transfer is an atomic operation. I'm interested in answers that reference Java 1.4 code as well as answers that might use resources from java.util.concurrent in Java 5

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• Why doesn't the jQuery .html() method work with custom tags in IE8?

  - by William Calleja

  I have the following html code: <mytag> Just Some Text </mytag> And I have this jQuery command $('mytag').each(function () { alert($(this).html()); }); In all browsers except IE I'm getting the inner HTML, in IE I'm not. Anyone can shed any light on this mystery? I've tested this with IE8, Mozilla, Opera, Chrome and Safari

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