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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_...
Why should you use an ORM? [closed]
...f query I am thinking of is a polymorphic query. A simple ORM query might select all shapes in your database. You get a collection of shapes back. But each instance is a square, circle or rectangle according to its discriminator.
Another type of query would be one that eagerly fetches an object ...
How to deal with a slow SecureRandom generator?
...
You should be able to select the faster-but-slightly-less-secure /dev/urandom on Linux using:
-Djava.security.egd=file:/dev/urandom
However, this doesn't work with Java 5 and later (Java Bug 6202721). The suggested work-around is to use:
-Djav...
Express res.sendfile throwing forbidden error
.... good catch. I didn't notice this small difference. I also wonder if the selected answer works not because it uses .sendfile but because it relies on something else completely (path). Thanks for pointing this out.
– tenor528
Feb 10 '16 at 15:53
...
get CSS rule's percentage value in jQuery
...ks fine, you have to add class="largeField" to the span, currently you are selecting an empty set.
– Adam Lassek
Jan 24 '12 at 0:19
...
Change Active Menu Item on Page Scroll?
... scroll event of the container (usually window).
Quick example:
// Cache selectors
var topMenu = $("#top-menu"),
topMenuHeight = topMenu.outerHeight()+15,
// All list items
menuItems = topMenu.find("a"),
// Anchors corresponding to menu items
scrollItems = menuItems.map(functio...
Where is the “Fold” LINQ Extension Method?
...is in part a consequence of picking a stupid name -- though not as bad as "select" for "map" -- and ignoring existing functional technology. As for Aggregate being a more familiar term in the OO realm ... no, not at all.
– Jim Balter
Aug 23 '13 at 23:16
...
Visual Studio jump to next error shortcut?
... Important: at least for VS 2017, I needed to in my "error view" have selected both "Build + Intellisense" in order for these shortcuts to work.
– Johan S
Feb 22 '18 at 10:23
...
IntelliJ IDEA jump from interface to implementing class in Java
...e some shortcut that would allow me after creating method in an interface, select and jump to implementing class of that interface?
...
What are naming conventions for MongoDB?
... singular (collections are plural)
MongoDB states a nice example:
To select a database to use, in the mongo shell, issue the use <db>
statement, as in the following example:
use myDB
use myNewDB
Content from: https://docs.mongodb.com/manual/core/databases-and-collections/#...