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Margin on child element moves parent element
...rent { overflow: hidden; }
This prevents the margins to collapse. Border and padding do the same.
Hence, you can also use the following to prevent a top-margin collapse:
.parent {
padding-top: 1px;
margin-top: -1px;
}
Update by popular request:
The whole point of collapsing margins is...
Using generic std::function objects with member functions in one class
... doesn't take any arguments (<void(void)>), you must bind the first (and the only) argument.
std::function<void(void)> f = std::bind(&Foo::doSomething, this);
If you want to bind a function with parameters, you need to specify placeholders:
using namespace std::placeholders;
std:...
Delete a closed pull request from GitHub
I accidentally made a wrong pull request and ended up closing the request myself. It's in a closed state right now but it's accessible via direct URL and showing on my activity bar.
...
How to correctly save instance state of Fragments in back stack?
.... In the fragment, save instance state by overriding onSaveInstanceState() and restore in onActivityCreated():
class MyFragment extends Fragment {
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
...
i...
Professional jQuery based Combobox control? [closed]
...refer the Combo Dropdown Box, but it still has some features that I'd want and it's still in alpha. The only think I don't like about this other than its being alpha... is that once I type in the combobox, the original dropdownlist items disappear. However, maybe there is a setting for this... or ma...
RegEx for Javascript to allow only alphanumeric
...y only works if the string is alphanumeric, meaning contains both a letter and a number. I just want one what would allow either and not require both.
...
How can I recover a removed file in Mercurial (if at all)?
...grep to find the deleted file you wish to recover. The output of this command will show you the last revision for which the file was present, and the path to the deleted file.
Second, run hg revert -r <revision number> <path to deleted file>
The deleted file will now be in your working ...
The import javax.servlet can't be resolved [duplicate]
... the project's classpath, or put a copy of the JAR in your Eclipse project and add it to the classpath from there.
If you want to leave the JAR in Tomcat's lib folder:
Right-click the project, click Properties.
Choose Java Build Path.
Click the Libraries tab
Click Add External JARs...
Browse to f...
Prevent user from seeing previously visited secured page after logout
...
You can and should not disable the browser back button or history. That's bad for user experience. There are JavaScript hacks, but they are not reliable and will also not work when the client has JS disabled.
Your concrete problem ...
How do I declare class-level properties in Objective-C?
... answered Mar 30 '09 at 4:50
Andrew GrantAndrew Grant
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