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Why do we need a pure virtual destructor in C++?

...mp; aModelConf); virtual ~IParams() = 0; void setParameter(const N_Configuration::Parameter& aParam); std::map<std::string, std::string> m_Parameters; }; struct NumericsParams : IParams { NumericsParams(const ModelConfiguration& aNumericsConf); virtual ~NumericsP...
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input type=“submit” Vs button tag are they interchangeable?

... we have to think beyond pure functionality. – pierre_loic Jun 10 at 16:43 add a comment  |  ...
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What is the recommended way to delete a large number of items from DynamoDB?

... What I ideally want to do is call LogTable.DeleteItem(user_id) - Without supplying the range, and have it delete everything for me. An understandable request indeed; I can imagine advanced operations like these might get added over time by the AWS team (they have a history of st...
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Proper SCSS Asset Structure in Rails

...it. So they can be used in type.scss in the bootstrap folder but also in my_model.css.scss. After this create a folder named partials or modules. This will be the place of most of the other files. You can just add the import to the application.scss file so it will look like: @import "bootstrap/bo...
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Open-sided Android stroke?

...two shapes, one of which with height 1dp placed at the bottom optionscreen_bottomrectangle.xml: <layer-list xmlns:android="http://schemas.android.com/apk/res/android"> <!-- This is the line --> <item> <shape> <solid android:color="#535353" /> &...
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Initialise a list to a specific length in Python [duplicate]

... or [{} for _ in range(10)] to avoid lint warnings – Martin Konecny May 3 '13 at 1:22 7 ...
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How to implement has_many :through relationships with Mongoid and mongodb?

...ified example from the Rails guides , how does one model a relational "has_many :through" association using mongoid? 4 Ans...
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What is the exact meaning of IFS=$'\n'?

... From http://www.linuxtopia.org/online_books/bash_guide_for_beginners/sect_03_03.html: Words in the form "$'STRING'" are treated in a special way. The word expands to a string, with backslash-escaped characters replaced as specified by the ANSI-C stan...
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Suppressing “is never used” and “is never assigned to” warnings in C#

.... This satisfies the compiler and the warnings are not raised: struct HTTP_FILTER_PREPROC_HEADERS { // // For SF_NOTIFY_PREPROC_HEADERS, retrieves the specified header value. // Header names should include the trailing ':'. The special values // 'method', 'url' and 'version' can...
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How can I detect the touch event of an UIImageView?

...swipeRight.direction = UISwipeGestureRecognizerDirectionRight; [imgView_ addGestureRecognizer:swipeRight]; [swipeRight release]; UISwipeGestureRecognizer *swipeLeft = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selecto...