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Iterator Loop vs index loop [duplicate]
...nly one out of four distinct ways to iterate over a std::vector:
1) index-based iteration
for (std::size_t i = 0; i != v.size(); ++i) {
// access element as v[i]
// any code including continue, break, return
}
Advantages: familiar to anyone familiar with C-style code, can loop using dif...
Targeting position:sticky elements that are currently in a 'stuck' state
...s one that plagues just about any proposed selector that attempts to match based on a rendered or computed style: circular dependencies.
In the case of a :stuck pseudo-class, the simplest case of circularity would occur with the following CSS:
:stuck { position: static; /* Or anything other than s...
How to Generate unique file names in C#
...the same directory. Of course, the file name generation should be adjusted based on your specific needs.
– Mas
Jun 10 '13 at 12:27
...
Rails update_attributes without save?
..._attributes but it doesn't save the record:
class User < ActiveRecord::Base
attr_accessible :name
attr_accessible :name, :is_admin, :as => :admin
end
user = User.new
user.assign_attributes({ :name => 'Josh', :is_admin => true }) # Raises an ActiveModel::MassAssignmentSecurity::Erro...
How do I use reflection to invoke a private method?
...a group of private methods in my class, and I need to call one dynamically based on an input value. Both the invoking code and the target methods are in the same instance. The code looks like this:
...
List goals/targets in GNU make that contain variables in their definition
...
Can you parse the output from make -pn (i.e. make --print-data-base --dry-run)? It prints out all the variables, rules, implicit rules and which commands will be run in laborious detail.
share
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Where should @Service annotation be kept? Interface or Implementation?
... Spring Beans, and
have an injection point that use the interface for type based injection,
then you will get and NoUniqueBeanDefinitionException
(or you have a very special configurations setup, with Environment, Profiles or Qualifiers ...)
Conclusion: If you use @Component (or @Service, ...) ...
Can you attach a UIGestureRecognizer to multiple views?
... much like detecting that say we haven't used a variable, XCode could tell based on the code that we have passed the same recognizer to multiple views and could warn the coder.
– Zoltán Matók
Aug 18 '14 at 11:52
...
Override devise registrations controller
I have added a field to the sign-up form that is based on a different model, see How do I use nested attributes with the devise model for the gory details. This part is working fine.
...
Return type of '?:' (ternary conditional operator)
...2 have class type, and the underlying class types are the same or one is a base class of the other: E1 can be converted to match E2 if the class of T2 is the same type as, or a base class of, the class of T1, and the cv-qualification of T2 is the same cv-qualification as, or a greater cv-qualificati...