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Using git repository as a database backend
...
I implemented a Ruby library on top of libgit2 which makes this pretty easy to implement and explore. There are some obvious limitations, but it's also a pretty liberating system since you get the full git toolchain.
The documentation includes some ideas a...
Bytecode features not available in the Java language
...sses can declare a receiver type and annotate these types. Constructors of top-level classes cannot annotate their receiver type as they most not declare one.
class Foo {
class Bar {
Bar(@TypeAnnotation Foo Foo.this) { }
}
Foo() { } // Must not declare a receiver type
}
Since Foo.class....
What is ViewModel in MVC?
...ntation model that contains another presentation model as a property. The top-level presentation model (i.e. view model) contains properties that are relevant to the page or application while the presentation model (property) contains properties that are relevant to application data.
We can take ou...
What does do?
...re using the X-UA-Compatible META tag you want to place it as close to the top of the page's HEAD as possible. Internet Explorer begins interpreting markup using the latest version. When Internet Explorer encounters the X-UA-Compatible META tag it starts over using the designated version's engine. T...
Why is a round-trip conversion via a string not safe for a double?
... showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg cla...
How does StartCoroutine / yield return pattern really work in Unity?
...it of work at one level – e.g. process a single A* node – and layer on top a way of grouping work together into larger chunks – e.g. keep processing A* nodes for X milliseconds. (Some people call this ‘timeslicing’, though I don’t).
Still, allowing the work to be broken up in this w...
Logical operators for boolean indexing in Pandas
..._and.reduce([m1, m2, m3])
This is powerful, because it lets you build on top of this with more complex logic (for example, dynamically generating masks in a list comprehension and adding all of them):
import operator
cols = ['A', 'B']
ops = [np.less, np.greater]
values = [5, 5]
m = np.logical_a...
Why does Java switch on contiguous ints appear to run faster with added cases?
...d bytecode uses a lookupswitch.
In tableswitch, the integer value on the top of the stack is used to index into the table, to find the branch/jump target. This jump/branch is then performed immediately. Hence, this is an O(1) operation.
A lookupswitch is more complicated. In this case, the intege...
demystify Flask app.secret_key
...ot spoof it. As stated a bit earlier this type of fingerprinting, where on top of the checksum one also provides a secret key, is called a Message Authentication Code.
What about Sessions?
Sessions in their classical implementation are cookies that carry only an ID in the content field, the se...
Usage of __slots__?
...ignificant recent contributions to.
Critiques of other answers
The current top answers cite outdated information and are quite hand-wavy and miss the mark in some important ways.
Do not "only use __slots__ when instantiating lots of objects"
I quote:
"You would want to use __slots__ if you are goin...