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When to use virtual destructors?
...e all automatic storage variables? ie there is no "special" or additional custom code to execute in the destructor. Is it ok then to leave off writing any destructors at all? Or will the derived class still have a memory leak?
– bobobobo
Jul 8 '12 at 18:27
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How to assign from a function which returns more than one value?
...The RHS of the operator is a vector, list, data frame, date object, or any custom object with an implemented destructure method (see ?zeallot::destructure).
Here are a handful of examples based on the original post,
library(zeallot)
functionReturningTwoValues <- function() {
return(c(1, 2))...
Purpose of Trigraph sequences in C++?
... They don't really say much except "results from an internal survey of customer feedback", but ah well. I am surprised that EBCDIC is still in widespread use though (and that these systems expect to use C++0x compilers)
– peterchen
Jul 27 '10 at 12:22
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Is there a “vim runtime log”?
Sometimes I try a customization/command in my vimrc. Everything seens to be correct, but it just doesn't work.
6 Answers
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How do I check if an element is really visible with JavaScript? [duplicate]
...he Element.getStyle() method and Element.visible() methods combined into a custom function. With getStyle() you can check the actual computed style.
I don't know exactly what you mean by "underneath" :) If you meant by it has a specific ancestor, for example, a wrapper div, you can use Element.up(cs...
Pagination in a REST web application
...this case the URI is not always
returning the same resource(s).
E.g. A customer stores a link to the product list page X, next time the link is opened the product in question might no longer be on page X.
share
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Placeholder in IE9
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We are working with a custom CRM. I added this code and the works as expected, but they submit their forms via javascript. The submit button has onclick="_IW.FormsRuntime.submit(this.form);". Is there anyway I can change this onclick event to firs...
Why are Python's 'private' methods not actually private?
...). :D Of course it doesn't work in classes, but you just have to define a custom function: def foo(self): self.private_function()
– Casey Kuball
May 8 '12 at 16:34
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Rails raw SQL example
...)
).each do |record|
# instead of an array of hashes, you could put in a custom object with attributes
@results << {col_a_name: record["col_a_name"], col_b_name: record["col_b_name"], ...}
end
Edit: as Huy said, a simple way is ActiveRecord::Base.connection.execute("..."). Another way is...
How to create EditText with rounded corners? [closed]
... Material Components Library you can use the MaterialShapeDrawable to draw custom shapes.
With a EditText you can do:
<EditText
android:id="@+id/edittext"
../>
Then create a MaterialShapeDrawable:
float radius = getResources().getDimension(R.dimen.default_corner_radius...