Eclipse tends to mess up your resources every now and then. This leads to some odd behavior such as strings and images being swapped all over your app, and more commonly classCastException(s), which happen when Eclipse switches your Views’ ids around. A few solutions to that problem: Clean your project. Modify an xml layout file … Read more
Why your code doesn’t work: Calling a virtual function on a value doesn’t use polymorphism. It calls the function which is defined for the type of this exact symbol as seen by the compiler, not the runtime type. When you insert sub types into a vector of the base type, your values will be converted … Read more
Welcome to const and reference collapsing. When you have const T&, the reference gets applied to T, and so does the const. You call g like g<int&>(n); so you have specified that T is a int&. When we apply a reference to an lvalue reference, the two references collapse to a single one, so int& … Read more
The issue is on the nature of lambdas. They are function objects with a fixed set of properties according to the standard, but they are not a function. The standard determines that lambdas can be converted into std::function<> with the exact types of arguments and, if they have no state, function pointers. But that does … Read more
Yes. You can read all about it here: https://docs.djangoproject.com/en/1.8/topics/auth/default/#django.contrib.auth.decorators.login_required … but here are some bullet points: add ‘django.contrib.auth.middleware.AuthenticationMiddleware’ to MIDDLEWARE_CLASSES in settings.py add ‘django.contrib.auth‘ and ‘django.contrib.contenttypes’ to INSTALLED_APPS in settings.py setup a URL for the login using django.contrib.auth.views.login for the view, such as url(r’^login/$’, ‘django.contrib.auth.views.login’,name=”my_login”) In your view, include the login_required decorator and add it … Read more
For template engines: Added security for end-user customization. Themes in pure PHP have unconstrained ability to cause harm to a user and their installation. Thus a template engine removes that risk, if it is a good one. Ease of use for non-programmers, such as graphic artists or web designers. For plain-php: The speed of pure … Read more
You can do this using a heredoc. e.g. generate.sh: #!/bin/sh #define parameters which are passed in. PORT=$1 DOMAIN=$2 #define the template. cat << EOF This is my template. Port is $PORT Domain is $DOMAIN EOF Output: $ generate.sh 8080 domain.example This is my template. Port is 8080 Domain is domain.example or save it to a … Read more
Check and download ASP.NET MVC 3 Futures on http://aspnet.codeplex.com/releases/view/58781 and see how the default source code looks. Note: this works for MVC 4 as well.
The default argument applies to the specialization — and, in fact, a specialization must accept (so to speak) the base template’s default argument(s). Attempting to specify a default in the specialization: template<class A = int, class B=double> class Base {}; template<class B=char> // … …is an error. Likewise, if we change the specialization so that … Read more
This is how I do it in JavaScript: var idx = 0; var data = { “names”: [ {“name”:”John”}, {“name”:”Mary”} ], “idx”: function() { return idx++; } }; var html = Mustache.render(template, data); Your template: {{#names}} {{name}} is {{idx}} {{/names}}