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How to immediately see compile errors in project tree of IntelliJ Idea?
... docked on the left)
click the "Project" dropdown in the upper left corner
select "Problems" under "Scopes"
You'll see a tree of files and problems. Also, on the bottom toolbar, you should see a tab called "Problems" which lists everything as well. It's not as easy to use as the Eclipse "Problem...
pandas GroupBy columns with NaN (missing) values
...s far result in potentially dangerous behavior as it is quite possible you select a dummy value that is actually part of the dataset. This is increasingly likely as you create groups with many attributes. Simply put, the approach doesn't always generalize well.
A less hacky solve is to use pd.drop_...
How can I convert a character to a integer in Python, and viceversa?
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that is because the latter got selected as the answer lol
– Sean W
Aug 29 at 17:05
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How do I set ${user} in Eclipse to get the correct @author tag? [duplicate]
... Preferences > Java > Code Style > Code Templates > Comments
Select Types and edit the template to insert another value (possibly a fixed one for now, or change the user.name property as mmyers suggests)
/**
* @author myUserValue
*
* ${tags}
*/
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how to mix links ( tag ) and headings ( tag ) in web standard?
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a > h1 will cause difficulty in selecting text
Since both are completely valid in HTML5, it is better to use h1 > a
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How to use orderby with 2 fields in linq? [duplicate]
... in MyList
orderby x.StartDate, x.EndDate descending
select x).ToList();
ThenByDescending is an extension method on IOrderedEnumerable which is what is returned by OrderBy. See also the related method ThenBy.
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get string value from UISegmentedControl
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Objective-C
NSString *title = [segment titleForSegmentAtIndex:segment.selectedSegmentIndex];
Swift:
let title = segment.titleForSegment(at: segment.selectedSegmentIndex)
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Negative matching using grep (match lines that do not contain foo)
...s your friend:
grep --help | grep invert
-v, --invert-match select non-matching lines
Also check out the related -L (the complement of -l).
-L, --files-without-match only print FILE names containing no match
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How to switch databases in psql?
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You can select the database when connecting with psql. This is handy when using it from a script:
sudo -u postgres psql -c "CREATE SCHEMA test AUTHORIZATION test;" test
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Colon (:) in Python list index [duplicate]
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a[len(a):] - This gets you the length of a to the end. It selects a range. If you reverse a[:len(a)] it will get you the beginning to whatever is len(a).
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