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  • What is the best way to store incremental downloaded data?

    - by afriza
    Inspired by Chromium's sha1 class, I am thinking to store incrementally downloaded data using std::string // pseudo-code char buff[BUFF_SIZE]; std::string data; do { size = ReadInternetFileTo(buff,BUFF_SIZE); data.append(buff,size); } while (not_finished); Any foreseeable problems with this method or better way to do it?

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  • Matplotlib: plotting discrete values

    - by Arkapravo
    I am trying to plot the following ! from numpy import * from pylab import * import random for x in range(1,500): y = random.randint(1,25000) print(x,y) plot(x,y) show() However, I keep getting a blank graph (?). Just to make sure that the program logic is correct I added the code print(x,y), just the confirm that (x,y) pairs are being generated. (x,y) pairs are being generated, but there is no plot, I keep getting a blank graph. Any help ?

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  • In php, how to detect the execution is from CLI mode or through browser ?

    - by binoy
    Hi, I have a common script which Im including in my php cron files and the files which are accessing through the browser. Some part of the code, I need only for non cron files. How can I detect whether the execution is from CLI or through browser (I know it can be done by passing some arguments with the cron files but I dont have access to crontab). Is there any other way ? Regards Binoy

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  • Make CMD sensitive to use with MySQL?

    - by acidzombie24
    I have a cleanup scrip in a bat file and i wanted to do the below but the problem is i get a mysql error saying unknown database and showing it as testdb. I guess i can change my code testdb but i would like to know. How do i have windows cmd use case sensitivity so i can execute queries properly instead of always in lower case? mysql.exe -u root -q "drop database TestDB; create database TestDB;"

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  • Mac laptop usage and development discussion?

    - by George2
    Hello everyone, I have got a new Mac book (MacBook Pro), and I am previously using Windows. I use this MacBook for personal (e.g. instant messaging, document, browsing the web) and development (writing C++ and Java code) purpose. Any recommended discussion group or forums (or I can directly ask here in StackOverflow)? I am a newbie. thanks in advance, George

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  • Weird gcc error stray/missing terminating " character in C

    - by DreamCodeR
    I get the following errors: error: missing terminating " character and error: stray `\' in program In this line of C code: system("sqlite3 -html /home/user/.rtcom-eventlogger/el.db \"SELECT service_id, event_type_id,free_text, remote_uid FROM Events WHERE remote_uid=\'%d\' ORDER BY start_time DESC;\" > lol.html", nr); "nr" is a integer variable. I have gone over this so many times but are totally stuck of finding a solution. EDIT: The errors is the ouput while compiling with gcc if I didn't make that clear.

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  • Pass variables to current tab via chrome extension

    - by iamthejeff
    I am writing my first chrome extension, and I want to pass a variable to the currently opened tab and manipulate the DOM with it. My extension has a button, and when clicked, is executing this code: chrome.tabs.getSelected(null, function(tab) { chrome.tabs.executeScript(tab.id, { file: 'tabscript.js' }); }); This works fine, but I see no way to pass a variable to tabscript.js so it can be used on the opened tab.

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  • Is it possible to profile memory usage of unit tests?

    - by Rowland Shaw
    I'm looking at building some unit tests to ascertain if resources are leaking (or not) using the unit testing framework that comes with Visual Studio. At present, I'm evaluating the latest version of ANTS Profiler, but I can't quite work out if it allows me to force a snapshot from code (so that I can take a snapshot, run a unit test a few hundred times, force a garbage collection, and take another snapshot, and save the results out for later analysis). Is this possible to do with ANTS/Visual Studio or should I be exploring options with other profilers?

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  • iframe in iframe

    - by TIT
    If I put a big iframe on the same page with all the content in the big iframe then can I put the search result onto the big iframe? any code for it?

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  • What am I not getting about this abstract class implementation?

    - by Schnapple
    PREFACE: I'm relatively inexperienced in C++ so this very well could be a Day 1 n00b question. I'm working on something whose long term goal is to be portable across multiple operating systems. I have the following files: Utilities.h #include <string> class Utilities { public: Utilities() { }; virtual ~Utilities() { }; virtual std::string ParseString(std::string const& RawString) = 0; }; UtilitiesWin.h (for the Windows class/implementation) #include <string> #include "Utilities.h" class UtilitiesWin : public Utilities { public: UtilitiesWin() { }; virtual ~UtilitiesWin() { }; virtual std::string ParseString(std::string const& RawString); }; UtilitiesWin.cpp #include <string> #include "UtilitiesWin.h" std::string UtilitiesWin::ParseString(std::string const& RawString) { // Magic happens here! // I'll put in a line of code to make it seem valid return ""; } So then elsewhere in my code I have this #include <string> #include "Utilities.h" void SomeProgram::SomeMethod() { Utilities *u = new Utilities(); StringData = u->ParseString(StringData); // StringData defined elsewhere } The compiler (Visual Studio 2008) is dying on the instance declaration c:\somepath\somecode.cpp(3) : error C2259: 'Utilities' : cannot instantiate abstract class due to following members: 'std::string Utilities::ParseString(const std::string &)' : is abstract c:\somepath\utilities.h(9) : see declaration of 'Utilities::ParseString' So in this case what I'm wanting to do is use the abstract class (Utilities) like an interface and have it know to go to the implemented version (UtilitiesWin). Obviously I'm doing something wrong but I'm not sure what. It occurs to me as I'm writing this that there's probably a crucial connection between the UtilitiesWin implementation of the Utilities abstract class that I've missed, but I'm not sure where. I mean, the following works #include <string> #include "UtilitiesWin.h" void SomeProgram::SomeMethod() { Utilities *u = new UtilitiesWin(); StringData = u->ParseString(StringData); // StringData defined elsewhere } but it means I'd have to conditionally go through the different versions later (i.e., UtilitiesMac(), UtilitiesLinux(), etc.) What have I missed here?

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  • How can I write this as a JavaScript function?

    - by Haluk
    I have the following code snippet embedded into some of my divs so when those divs get clicked a certain radio button gets checked. onclick="document.g1.city[0].checked=true;" However I would like to convert the above call to a function call like below: onclick="checkRadioButton(city[0]);" And the function will be something like this function checkRadioButton(input){ document.g1.input.checked=true; } Is there a way I can accomplish this?

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  • SQl function in android

    - by rui.pereira
    Cursor cursor = db.rawQuery("SELECT COUNT(rat) FROM "+ TABLE_NAME_EXTRA +" apkid=\""+apkid, null); cursor.moveToFirst(); int somatotal = cursor.getInt(0); I'm trying to do a SQL function like count and sum, but this code returns a exception saying "emptyvalues". anyone know why?

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  • c++ dynamic_cast error handling

    - by Nazgob
    Is there any good practice related to dynamic_cast error handling (except not using it when you don't have to)? I'm wondering how should I go about NULL and bad_cast it can throw. Should I check for both? And if I catch bad_cast or detect NULL I probably can't recover anyway... For now, I'm using assert to check if dynamic_cast returned not NULL value. Would you accept this solution on a code review?

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  • Sorting a Data Gridview

    - by Muhammad Waqas
    Hi, I am a beginner to asp.net. I want to sort a gridview but the problem i m facing is when sort event handler is called the exception of stack over flow is thrown. Following is my code for sorting function. protected void sortGridView(string strSortExpression) { if (strSortExpression != string.Empty) { if (ViewState["sortOrder"] == "desc") { dgvBookInfo.Sort(strSortExpression, SortDirection.Ascending); //string.Format("{0}{1}", ); } else { dgvBookInfo.Sort(strSortExpression, SortDirection.Descending); } } } Thanks

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  • how to create a dynamic sql statement w/ python and mysqldb

    - by Elias Bachaalany
    I have the following code: def sql_exec(self, sql_stmt, args = tuple()): """ Executes an SQL statement and returns a cursor. An SQL exception might be raised on error @return: SQL cursor object """ cursor = self.conn.cursor() if self.__debug_sql: try: print "sql_exec: " % (sql_stmt % args) except: print "sql_exec: " % sql_stmt cursor.execute(sql_stmt, args) return cursor def test(self, limit = 0): result = sql_exec(""" SELECT * FROM table """ + ("LIMIT %s" if limit else ""), (limit, )) while True: row = result.fetchone() if not row: break print row result.close() How can I nicely write test() so it works with or without 'limit' without having to write two queries?

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  • Case Order by using Null

    - by molgan
    Hello I have the following test-code: CREATE TABLE #Foo (Foo int) INSERT INTO #Foo SELECT 4 INSERT INTO #Foo SELECT NULL INSERT INTO #Foo SELECT 2 INSERT INTO #Foo SELECT 5 INSERT INTO #Foo SELECT 1 SELECT * FROM #Foo ORDER BY CASE WHEN Foo IS NULL THEN Foo DESC ELSE Foo END DROP TABLE #Foo I'm trying to produce the following output: 1 2 3 4 5 NULL "If null then put it last" How is that done using Sql 2005 /M

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  • How do I build a hello world class with maven?

    - by httpinterpret
    Now the source code is ready, how can I build it with maven? Suppose the source file is hw.java I've googled some time, all the solutions requires me to set the directory in a fixed manner. But what I want to do is keep hw.java in current directory (.), and then: vi pom.xml ... mkdir build cd build maven ... Can I have that kind of freedom with maven?

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  • How to inherit events between objects

    - by marduck19
    I need inherit events and properties for example move a picture around the form Y have this code to move the picture but y need create multiple images with the same behavior private void pictureBox_MouseDown(object sender, MouseEventArgs e) { if (e.Button == MouseButtons.Left) { x = e.X; y = e.Y; } } private void pictureBox_MouseMove(object sender, MouseEventArgs e) { if (e.Button == MouseButtons.Left) { pictureBox.Left += (e.X -x); pictureBox.Top += (e.Y - y); } }

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