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What happens when there's insufficient memory to throw an OutOfMemoryError?
...5.3.
If a computation requires more heap than can be made available by the automatic storage management system, the Java virtual machine
throws an OutOfMemoryError.
So, it does a computation in advance before doing allocation of the object.
What happens is that the JVM tries to allo...
List of lists changes reflected across sublists unexpectedly
... objects, without seeing expressions. When you use * to multiply [[1] * 4] by 3, * only sees the 1-element list [[1] * 4] evaluates to, not the [[1] * 4 expression text. * has no idea how to make copies of that element, no idea how to reevaluate [[1] * 4], and no idea you even want copies, and in ge...
What does |= (ior) do in Python?
... # 3
where the final value of s1 is equivalent either by:
an assigned OR operation
an in-place OR operation
an in-place OR operation via special method++
Example
Here we apply OR (|) and the inplace OR (|=) to sets:
>>> s1 = {"a", "b", "c"}
>>> s2 = {"d", "e"...
Combine multiple Collections into a single logical Collection?
... 2, 3, 4, 5, 6, 7, 8, 9]
[1, 2, 3, 4, 5, 6, 7, 8, 9, 9999999]
Edit:
By Request from Damian, here's a similar method that returns a live Collection View
public final class CollectionsX {
static class JoinedCollectionView<E> implements Collection<E> {
private final Co...
How to save CSS changes of Styles panel of Chrome Developer Tools?
...der to Workspace. You can get to a stylesheet in the Sources panel quickly by clicking the stylesheet at the top-right of each CSS rule for a selected element in the Elements panel.
After adding the folder, you'll have to give Chrome access to the folder.
Next, you need to map the network reso...
Why doesn't Java support unsigned ints?
...stly, I'd say it was a reasonable decision. Possibly, I would have:
made byte unsigned, or at least have provided a signed/unsigned alternatives, possibly with different names, for this one data type (making it signed is good for consistency, but when do you ever need a signed byte?)
done away wit...
Max size of an iOS application
...onally, the total uncompressed size of the app must be less than 4 billion
bytes. However, consider download times when determining your app’s size. Minimize the file’s size
as much as possible, keeping in mind that there is a 100 MB limit for over-the-air downloads.
This information can be fou...
How to add column if not exists on PostgreSQL?
...
@HenrikSommerland: that is allowed - but only by the person who asked the question.
– a_horse_with_no_name
Jul 10 '19 at 9:42
...
How to write DataFrame to postgres table?
...variable, everything else should work just fine
– Bobby
Jul 12 '18 at 20:34
2
why do you do outpu...
Label encoding across multiple columns in scikit-learn
...
As mentioned by larsmans, LabelEncoder() only takes a 1-d array as an argument. That said, it is quite easy to roll your own label encoder that operates on multiple columns of your choosing, and returns a transformed dataframe. My code he...