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What is a “Bitmap heap scan” in a query plan?
...ee also the wikipedia article.
In short, it's a bit like a seq scan. The difference is that, rather than visiting every disk page, a bitmap index scan ANDs and ORs applicable indexes together, and only visits the disk pages that it needs to.
This is different from an index scan, where the index is...
Select tableview row programmatically
...tRowAtIndexPath: message, nor does it send UITableViewSelectionDidChangeNotification notifications to observers.
What I would do is:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
[self doSomethingWithRowAtIndexPath:indexPath];
}
And then, from...
Android studio: why are minSdkVersion and targetSdkVersion specified both in AndroidManifest.xml and
...configuration options in the build.gradle file that override what is specified in the AndroidManifest.xml file.
2 Answe...
What does the variable $this mean in PHP?
... created by the interpreter for you, that contains an array of variables.
If you call $this inside a normal method in a normal class, $this returns the Object (the class) to which that method belongs.
It's possible for $this to be undefined if the context has no parent Object.
php.net has a b...
std::string length() and size() member functions
...ed length() for std::string (I always used size() ). Is there any specific reason for having this method in std::string class? I read both MSDN and CppRefernce, and they seem to indicate that there is no difference between size() and length() . If that is so, isn't it making more confusing...
WPF Textblock, linebreak in Text attribute
...
@Knasterbax if the text is specified as the content between <TextBlock> and </TextBlock> then yeah, you'll need <LineBreak/>. &#10; works inside the Text attribute: <TextBlock Text="..." />
...
Programmatically go back to the previous fragment in the backstack
...n().replace(R.id.content_frame,fragment).addToBackStack("tag").commit();" if you write addToBackStack(null) , it will handle it by itself but if you give a tag , you should handle it manually.
– Khaled Saif
Dec 8 '15 at 11:14
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New Line on PHP CLI
...e a something on linux but want to read it on a Mac-system, or Win-system. If you don't know the target system, or it can change (--> somebody forwards a mail with a generated file as attachment), use \n
– KingCrunch
Sep 12 '14 at 12:15
...
Handler “ExtensionlessUrlHandler-Integrated-4.0” has a bad module “ManagedPipelineHandler” in its mo
...in a scenario that it wasn't designed for. You are using it inside of IIS. If you look at the prior MSDN link (emphasis is mine):
Provides a simple implementation of the HttpWorkerRequest abstract class that can be used to host ASP.NET applications outside an Internet Information Services (IIS) ...
Perl flags -pe, -pi, -p, -w, -d, -i, -t?
I have seen lots of ways of running Perl code or scripts, with different flags. However, when I try to google for what each flag means, I mainly get results to generic Perl sites and no specific information regarding the flags or their use is found there.
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