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Best way to handle list.index(might-not-exist) in python?
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thing_index = thing_list.index(elem) if elem in thing_list else -1
One line. Simple. No exceptions.
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Attach a file from MemoryStream to a MailMessage in C#
...types by System.Net.Mime.MimeTypeNames like System.Net.Mime.MediaTypeNames.Application.Pdf
Based on Mime Type you need to specify correct extension in FileName for instance "myFile.pdf"
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Postgresql aggregate array
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Use array_agg: http://www.sqlfiddle.com/#!1/5099e/1
SELECT s.name, array_agg(g.Mark) as marks
FROM student s
LEFT JOIN Grade g ON g.Student_id = s.Id
GROUP BY s.Id
By the way, if you are using Postgres 9.1, you don't need ...
How do I know if a generator is empty from the start?
...quence in memory. So there's no backward traversal.
You could write a has_next function or maybe even slap it on to a generator as a method with a fancy decorator if you wanted to.
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Can't ignore UserInterfaceState.xcuserstate
...xcode; 2) go to the project directory and do an "ls -la" from the terminal app to make sure you see the .git and .gitignore files; 3) change "ProjectFolder" in the example above to the name of your project; 4) do the two git commands that matt shows; 5) Relaunch XCode and do a commit and verify that...
Example: Communication between Activity and Service using Messaging
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For sending data to a service you can use:
Intent intent = new Intent(getApplicationContext(), YourService.class);
intent.putExtra("SomeData","ItValue");
startService(intent);
And after in service in onStartCommand() get data from intent.
For sending data or event from a service to an applicati...
How do I check if a string contains another string in Objective-C?
...re on iOS 8 or OS X Yosemite, you can now do: (*NOTE: This WILL crash your app if this code is called on an iOS7 device).
NSString *string = @"hello bla blah";
if ([string containsString:@"bla"]) {
NSLog(@"string contains bla!");
} else {
NSLog(@"string does not contain bla");
}
(This is also...
Calculate the center point of multiple latitude/longitude coordinate pairs
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The simple approach of just averaging them has weird edge cases with angles when they wrap from 359' back to 0'.
A much earlier question on SO asked about finding the average of a set of compass angles.
An expansion of the approach re...
Why doesn't Internet Explorer 11 honour conditional comments even when emulating Internet Explorer 8
...nd below (via conditional comments), and the browser simply ignores them. -_-
This feature worked perfectly fine in Internet Explorer 10, and Microsoft just had to tinker with it, didn't they?
<!--[if lte IE 8]><script src="ie8-html5.js"></script><![endif]-->
Apart from...
How do I tidy up an HTML file's indentation in VI?
...really want to, you can get those tags to be indented like so:
:let g:html_indent_inctags = "html,body,head,tbody"
See "HTML indenting not working in compiled Vim 7.4, any ideas?" and "alternative html indent script" for more information.
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