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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The current top answers cite outdated information and are quite hand-wavy and miss the mark in some important ways.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...
mmap() vs. reading blocks
...n, but I was looking for an answer and this question kept coming up at the top of Google results.)
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How to find list of possible words from a letter matrix [Boggle Solver]
...y isn't infinitely fast.
Perl Implementation
My implementation is a bit top-heavy because I placed importance on being able to know the exact path of every extracted string, not just the validity therein.
I also have a few adaptions in there that would theoretically permit a grid with holes in ...
Concurrent vs serial queues in GCD
...matically.Task are executed in parallel. With more than
that(maxConcurrentOperationCount) is reached, some tasks will behave
as a serial until a thread is free.
func doLongSyncTaskInConcurrentQueue() {
let concurrentQueue = DispatchQueue(label: "com.queue.Concurrent", attributes: .concurren...
Using Auto Layout in UITableView for dynamic cell layouts & variable row heights
...ges pinned to the edges of the cell's contentView (most importantly to the top AND bottom edges). NOTE: don't pin subviews to the cell itself; only to the cell's contentView! Let the intrinsic content size of these subviews drive the height of the table view cell's content view by making sure the co...
Move assignment operator and `if (this != &rhs)`
...uild the fastest operations in at the lowest level, and then to add API on top of that for fuller features at more expense. I.e. you need the strong exception guarantee, fine, you pay for it. You don't need it? Here's a faster solution.
Let's get concrete: Here's the fast, basic exception guara...