text stringlengths 1 1.11k | source dict |
|---|---|
javascript, node.js, library
isDate returns true for 37, it feels wrong. I would try to parse numbers as well. Furthermore the functional name lies a bit, it does not check whether value is a date, but whether it can be converted to a date.
I prefer list more than arr, it reads better as a whole word
arr.every((a,b,... | {
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"tags": "javascript, node.js, library",
"url": null
} |
ros, joystick, turtlesim-node
Title: Dropping connection
I am trying to run joy Tutorials/WritingTeleopNode on Ubuntu 11.4 with ROS electric. I am using a Cordless Rumble Pad 2. Everytime I get an [ERROR] [1323140529.624261794]: Client [/teleop] wants topic /joy to have datatype/md5sum [joy/Joy/e3ef016fcdf22397038b... | {
"domain": "robotics.stackexchange",
"id": 7533,
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"tags": "ros, joystick, turtlesim-node",
"url": null
} |
Maximum number of edges to be removed to contain exactly K connected components in the Graph, Count number of edges in an undirected graph, Program to find total number of edges in a Complete Graph, Number of Simple Graph with N Vertices and M Edges, Minimum number of edges between two vertices of a graph using DFS, Mi... | {
"domain": "stcroixboardwatch.org",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9902915212263165,
"lm_q1q2_score": 0.8164576595358845,
"lm_q2_score": 0.8244619306896955,
"openwebmath_perplexity": 312.30254003410147,
"openwebmath_score": 0.5566982626914978,
... |
java, beginner, mvc, tic-tac-toe
// evaluate the right-to-left diagonal
for (int i = 0; i < 3; i++) { // rows
for (int j = 0; j < 3; j++) { // columns
if (i + j == 2) {
if (gameGrid[i][j].getOwner() == Symbol.values()[0]) {
scores[7]++;
... | {
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"id": 19523,
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "java, beginner, mvc, tic-tac-toe",
"url": null
} |
formal-languages, formal-grammars, context-sensitive
Because the replacement in a context-sensitive rule must contain at least one symbol between the prefix and the suffix, the replaced string must be at least as long as the original, so the derivation must be monotonically non-shrinking. That makes it possible to enu... | {
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"tags": "formal-languages, formal-grammars, context-sensitive",
"url": null
} |
c#, multithreading, .net
}
}
} Locking
As I read the code I can see that any public method has big lock (m_locker) which should be fine for thread safety. Any transactional usage would need another locking, but that is not problem of your static class - well, you could somehow expose the locking (e.g. creating IDi... | {
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"tags": "c#, multithreading, .net",
"url": null
} |
bond, ions, ionic-compounds
Title: Why is the overall charge of an ionic compound zero?
My textbook simply says:
Since an ionic compound consists of equal number of positive and negative ions, the overall charge of an ionic compound is zero.
But why is the number of positive and negative ions equal?
Can’t an ionic ... | {
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"tags": "bond, ions, ionic-compounds",
"url": null
} |
# Extensible arrows
$\TeX$ code Result preview \xrightarrow{over} $\xrightarrow{over}$ \xRightarrow{abc} $\xRightarrow{abc}$ \xrightharpoonup{abc} $\xrightharpoonup{abc}$ \xrightarrow[under]{over} $\xrightarrow[under]{over}$ \xmapsto{abc} $\xmapsto{abc}$ \xrightharpoondown{abc} $\xrightharpoondown{abc}$ \xleftarrow{a... | {
"domain": "calculla.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9724147161743552,
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"lm_q2_score": 0.828938806208442,
"openwebmath_perplexity": 10316.063277768013,
"openwebmath_score": 1.0000098943710327,
"tags": n... |
values of f(x) increase without bound as x→+ or as x→− , then we write lim x→+ f(x)=+ or lim x→− f(x)=+ as appropriate; and if the values of f(x)decrease without bound as x→+ or as In general, the end behavior of any polynomial function can be modeled by the function comprised solely of the term with the highest power ... | {
"domain": "lincoln-marti.net",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9674102580527664,
"lm_q1q2_score": 0.8260839620823875,
"lm_q2_score": 0.8539127585282744,
"openwebmath_perplexity": 439.247835415362,
"openwebmath_score": 0.6195285320281982,
"... |
PS. None of the colleagues I asked the question is an expert in algebra, and I am a mathematics educator.
PPS. You may replace "monoid" with whatever you wish, providing that you keep the rest of the title intact! Please keep your example natural (if there is one)!
• See the first answer to this question. It also giv... | {
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"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9693242000616578,
"lm_q1q2_score": 0.8314553786835293,
"lm_q2_score": 0.8577681013541611,
"openwebmath_perplexity": 231.74603510354507,
"openwebmath_score": 0.9263762831687927,
"tag... |
c#, winforms, chess
{
foreach (var inputFigure in inputFigures)
{
RemoveFromTeam(inputFigure);
}
}
private static void RemoveMultipleFiguresFromFiguresList(params Figure[] inputFigures)
{
foreach (var inputFigure in inputFigures)
{
Figures.Rem... | {
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"openwebmath_score": null,
"tags": "c#, winforms, chess",
"url": null
} |
turing-machines
Title: Turing machine loop and reject example I'm getting confused on these both. Reject the string does a stop while loop the machine goes on and on.
My textbook has one example on a reject state and no physical one for loop:
Assume that no reject state was given. And I input a string
$1^{q_{1}}011$
A... | {
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"openwebmath_score": null,
"tags": "turing-machines",
"url": null
} |
samtools, mpileup
and run it through mpileup:
$ samtools mpileup -Q0 -B oneread.sam
This will show you that this read's base quality dips below 20 at the position you are interested in. Thus, as finswimmer suspected, your -Q20 is removing it at this position. | {
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"id": 1077,
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"tags": "samtools, mpileup",
"url": null
} |
let us discuss what is the area of a triangle, and different methods used to find the area of a triangle in the coordinate geometry. Since this process often involves placing geometric figures in a coordinate plane, it is commonly known as coordinate geometry. Now, just verify that d(AX) = d(BX), and that this is not e... | {
"domain": "sumcoop.com",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9896718496130619,
"lm_q1q2_score": 0.8068126433802972,
"lm_q2_score": 0.8152324871074607,
"openwebmath_perplexity": 587.6750757794822,
"openwebmath_score": 0.685784101486206,
"tags":... |
php, object-oriented, security, database, mysqli
/********************************************************************************
3) This function is used to Update records
@param: $tableName [required]
@param: $data [required] This is an associative array like 'tableColumn' => 'value to insert'
@pa... | {
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"tags": "php, object-oriented, security, database, mysqli",
"url": null
} |
Solution of the Poisson's equation on an unstructured mesh using Matlab distmesh and Finite DIfference. oregonstate. Then the main question in here. Numerical Modeling And Ysis Of The Radial Polymer Casting In. Finite Differences Finite differences. A FINITE DIFFERENCE SCHEME FOR OPTION PRICING IN JUMP DIFFUSION AND EX... | {
"domain": "cbeu.pw",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9888419671077918,
"lm_q1q2_score": 0.8084519532964451,
"lm_q2_score": 0.8175744761936437,
"openwebmath_perplexity": 593.6983759923623,
"openwebmath_score": 0.6288873553276062,
"tags": null,
... |
c++, algorithm, 2048
TEST_METHOD(testTwoTwos)
{
assertAllRotatedTransformTransitions(
{
{ 2, 2, 0, 0 },
{ 0, 0, 0, 0 },
{ 0, 0, 0, 0 },
{ 0, 0, 0, 0 }
},
"r",
... | {
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "c++, algorithm, 2048",
"url": null
} |
c++, game, adventure-game
Then we can just have one variable of type Race, that will get set as appropriate - and will definitely only ever refer to one Race. This should also probably be a member variable of Player. | {
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"tags": "c++, game, adventure-game",
"url": null
} |
haskell, primes
isPrime works fine for v=0 and v=1, but hangs forever for v>1. Ok, I get it : the mutual recursion creates an infinite loop, due to takeWhile trying to access a primes element which is not yet computed.
One thing I don't understand though, is why primes !! 0 and primes !! 1 hang forever, too.
I tried m... | {
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"tags": "haskell, primes",
"url": null
} |
## [2,] 1 1 0 0
## [3,] 1 1 0 0
## [4,] 1 0 1 0
## [5,] 1 0 1 0
## [6,] 1 0 1 0
## [7,] 1 0 0 1
## [8,] 1 0 0 1
## [9,] 1 0 0 1
# Using the library R function to compare:
round(a %*% ginv(a) %*% a,0) # round just for... | {
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"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9752018398044143,
"lm_q1q2_score": 0.8018003548766387,
"lm_q2_score": 0.8221891327004132,
"openwebmath_perplexity": 8614.690130796489,
"openwebmath_score": 0.6164302229881287,
"tags": null,
... |
c#, mysql, winforms, dapper
var mRep= new MaterialRepository();
comboBox1.Items.Clear();
foreach (var item in listMaterial)
It's not clear where listMaterial is coming from, and the coupling between what appears to be your UI (/form) and that MaterialRepository class isn't ideal either. Why instantiate a new Materia... | {
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"tags": "c#, mysql, winforms, dapper",
"url": null
} |
c++, reinventing-the-wheel, c++17, template, vectors
You are attempting to modify the input parameter (which is both const and reference to something else that should not be changed).
It seems to be a corruption of the copy and swap idiom.
The test for self assignment is counter productive. It will actually slow thing... | {
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"tags": "c++, reinventing-the-wheel, c++17, template, vectors",
"url": null
} |
physical-chemistry, thermodynamics, entropy
We estimate the saturation pressure at $T_1$ by the Clausius-Clapeyron equation
\begin{align}
P_1 &= P_2 \exp\bigg[-\dfrac{\Delta_\pu{vap} H}{R}\bigg(\dfrac{1}{T_1} - \dfrac{1}{T_2}\bigg)\bigg] \\
P_1 &= (\pu{1 bar}) \exp\bigg[-\dfrac{\pu{40639 J/mol}}{\pu{8.314 J/mol K}... | {
"domain": "chemistry.stackexchange",
"id": 17295,
"lm_label": null,
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "physical-chemistry, thermodynamics, entropy",
"url": null
} |
microbiology, homework, pathology, medicine
Title: What can cause a lump in the middle of the neck? (homework case study) What can cause an erythematous, fluctuant, nontender mass in the middle of the neck?
Full Case Study: (Its the last of 6 cases and I just can't figure this one out, because of all the possibilitie... | {
"domain": "biology.stackexchange",
"id": 4008,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "microbiology, homework, pathology, medicine",
"url": null
} |
is the energy possessed by an object because it is in motion. Let the mass of the triangle be M. What is the moment of inertia of this triangle for rotation about an axis that is perpendicular to the plane of the triangle and through one of vertices of the triangle? The moment of inertia of a rod rotated about its cent... | {
"domain": "cloudtools.it",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9911526441330527,
"lm_q1q2_score": 0.8628947828940822,
"lm_q2_score": 0.8705972667296309,
"openwebmath_perplexity": 368.8009363110306,
"openwebmath_score": 0.6580184102058411,
"tags": ... |
general-relativity, black-holes, spacetime, galaxies
Title: Mass and time relativity In the space between galaxies in the absence of matter, would time run faster than inside a galaxy? A black hole can slow time. Is there a cosmic opposite of that effect on time? Like the following question:
If time stood still at th... | {
"domain": "physics.stackexchange",
"id": 27977,
"lm_label": null,
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"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "general-relativity, black-holes, spacetime, galaxies",
"url": null
} |
mathematical-physics
F_i = -\frac{\partial U}{\partial x^i} + \frac{d}{dt} \left( \frac{\partial U}{\partial \dot{x}_i} \right) \\
2) & \boldsymbol{\nabla \times F} = 0 & | &
\frac{\delta F_i(t)}{\delta x_j(t')} - \frac{\delta F_j(t')}{\delta x_i(t)} = 0 \\
3) & \oint_{S^1} dt \, \boldsymbol{F}(\boldsymbol{r}(t)) \b... | {
"domain": "physics.stackexchange",
"id": 10630,
"lm_label": null,
"lm_name": null,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "mathematical-physics",
"url": null
} |
differentiation, non-linear-systems, dispersion, integrable-systems
To put it simply the third derivative is responsible for the dispersivity of the equation. If you add a scalar prefactor to this derivative you will observe a dispersion of your initial cosine wave. I found the following animation on the Wikepedia art... | {
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "differentiation, non-linear-systems, dispersion, integrable-systems",
"url": nul... |
python, object-oriented, python-3.x, web-scraping, xpath
self.visited.add(link)
print('Scraping Now: ' + link)
response = self.session.get(link)
tree = html.fromstring(response.text)
# extracting the follow up links
pizza_shop_links = tree.xpath("//div[@class='info']//a[@class... | {
"domain": "codereview.stackexchange",
"id": 26356,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "python, object-oriented, python-3.x, web-scraping, xpath",
"url": null
} |
a straight line drawn through a scatter of data points that best represents the relationship between them. Least Squares Surface Fitting This is a demo to go along with my blog post: Incremental Least Squares Surface and Hyper-Volume Fitting This page uses WebGL2, which should be enabled by default in chrome 56 in Janu... | {
"domain": "milanoporteeserramenti.it",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.989013056721729,
"lm_q1q2_score": 0.8108852078088641,
"lm_q2_score": 0.8198933293122506,
"openwebmath_perplexity": 843.3904012318386,
"openwebmath_score": 0.5453050136566162,... |
observational-astronomy, photography, space-telescope
Large, sensitive, low-noise IR detectors are now available; the current plan is to use a total of 18 individual 4k x 4k detectors -- a huge advance over the original mid-1990s 256 x 256 NICMOS detector installed in HST in 1997, and over the single 1k x 1k detector ... | {
"domain": "astronomy.stackexchange",
"id": 5216,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "observational-astronomy, photography, space-telescope",
"url": null
} |
ds.algorithms, co.combinatorics
Title: Finding small sets of integers in which every element is a sum of two others This is a follow-up to this question on math.stackexchange.
Let us say that a non-empty set S ⊆ ℤ is self-supporting if for every a ∈ S, there exist distinct elements b,c ∈ S such that a = b + c. For pos... | {
"domain": "cstheory.stackexchange",
"id": 27,
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"openwebmath_score": null,
"tags": "ds.algorithms, co.combinatorics",
"url": null
} |
python, python-3.x, web-scraping, asynchronous, python-requests
return chapters
def main():
loop = asyncio.get_event_loop()
chapters = loop.run_until_complete(run())
print(len(chapters))
if __name__ == '__main__':
main() Looks ... great? Not a lot to complain about really.
The semaphore doesn't do a... | {
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"id": 17062,
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"openwebmath_score": null,
"tags": "python, python-3.x, web-scraping, asynchronous, python-requests",
"url": null... |
experimental-physics, dark-matter, modified-gravity
Title: Have there been any physics experiments or searches to try to disprove the hypothesised existence of dark matter? Have there been any experiments or searches in which scientists have sought to disprove the hypothesis of the existence of dark matter? If so, wha... | {
"domain": "physics.stackexchange",
"id": 33358,
"lm_label": null,
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "experimental-physics, dark-matter, modified-gravity",
"url": null
} |
or have one property but not the other! I It is clearly not re exive since for example (2;2) 62 R . In mathematics, an equivalence relation is a binary relation that is reflexive, symmetric and transitive.The relation "is equal to" is the canonical example of an equivalence relation. Click hereto get an answer to your ... | {
"domain": "wasteclub.org",
"id": null,
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"lm_q1_score": 0.9284088005554475,
"lm_q1q2_score": 0.8222280473353932,
"lm_q2_score": 0.8856314662716159,
"openwebmath_perplexity": 387.0013629805693,
"openwebmath_score": 0.7882970571517944,
"tag... |
electrical-engineering, consumer-electronics
Title: Is it possible that an electronic device "half-works" when the power adapter supplies too much voltage? I work in a lab, and I've been trying to replace a lost AC-DC power adapter. I got one recently that has the exact specs that I need, which are apparently pretty r... | {
"domain": "engineering.stackexchange",
"id": 595,
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"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "electrical-engineering, consumer-electronics",
"url": null
} |
optics, photons, quantum-electrodynamics, refraction, quasiparticles
This is true. In a medium, photons can couple with the excitations (quasiparticles) of that medium. For example, a polariton is a superposition of a photon with a quasiparticle such as an exciton.
But why does that make them "quasiparticles" instea... | {
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"url": nu... |
electrical-engineering
The threaded rod provides positive locking at zero power with no prospect of "overhauling". As long as the door will not flex under Foxy assault when pulled solidly into its frame then dinner is off.
Level of travel can be set to suit by length of rod and mounting. Any door size up to a full do... | {
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} |
java, file, console, statistics
System.out.println("r = " + correlationCoefficient);
}
private static List<Point2D.Double>
readDataPointsFromFile(String dataFileName) throws IOException {
List<String> dataFileLines =
Files.readAllLines(new File(dataFileName).toPath());
... | {
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"url": null
} |
c#, strings, regex
Why do you only check if the yes regex is a match, what if the input is different from the one that matches the no answer? What do you expect the code to do in this case? You return a "No" in any case that the yes regex does not match, then why have the no regex declared at all?
This also applies to... | {
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"url": null
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java, multithreading, file
if (word.toString().equalsIgnoreCase(END_FLAG)) {
isInterrupted = true;
} else {
writer.write(word + " ");
}
}
} catch (InterruptedException | IOException ex) {
System.err.printf("Error wr... | {
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and vice versa.
For ${\displaystyle {\text{(1)}}\implies {\text{(2)}}}$, assume that all decompositions are unique. We will show that ${\displaystyle B_{1}\!{\mathbin {{}^{\frown }}}\!\cdots \!{\mathbin {{}^{\frown }}}\!B_{k}}$ spans the space and is linearly independent. It spans the space because the assumption that... | {
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"tags": ... |
Suppose that the numbers $a_0, \dots, a_n$ are chosen uniformly from an interval $[m, M]$ where $M - m \ll m$.
Note that the roots of the polynomial
$$p(x) = \sum_{i = 0}^n a_i x^i$$
are independent of the scaling of $p$, so if we divide by $(m + M)/2$ we may replace this with the following assumption:
Let $\epsilo... | {
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"openwebmath_score": 0.8915950655937195,
"tags... |
algorithm-analysis, runtime-analysis, dynamic-programming, knapsack-problems, pseudo-polynomial
$nW$ is polynomial in $n$ and $W$. However, we usually consider the running time of an algorithm as a function of the size of the input.
This is where the argument about $\log W$ comes in. Ignoring the values of the items f... | {
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Note that both results are equal.
`isequal(a,symmatrix(asym))`
```ans = logical 1 ```
### Display of Operations Involving Symbolic Matrix Variables
Matrices like those returned by `eye`, `zeros`, and `ones` often have special meaning with specific notation in symbolic workflows. Declaring these matrices as symbolic ... | {
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"tags":... |
java, swing, gui
int year = getYear();
if (year == -1) return;
start.set(year,
monthComboBox.getSelectedIndex(),
chooseDaySlider.getValue());
if (!isValidDate(start)) {
JOptionPane.showMessageDialog(null,
"The input date is invalid!",
"Erro... | {
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"openwebmath_score": null,
"tags": "java, swing, gui",
"url": null
} |
linear-systems
Second sequence
This sequence is supposed to be time-invariant.
\begin{align}y[n] &= \sum_{k=n-n_0}^{n+n_0} x[k]\\
y_2[k] &= \sum_{k=n-n_0}^{n+n_0} x_2[k] = \sum_{k=n-n_0}^{n+n_0} x_1[k - n_0] = \sum_{k=n_0-2n_0}^{n} x_1[k] = y_1[n-n_0]\end{align}
I followed the same steps but I'm still not sure about f... | {
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general-relativity
IMHO he could have found a way to explain things more clearly. Imagine you drop a 511keV electron into a black hole. Now, you know that gravity is not a force in the Newtonian sense. And you know about conservation of energy. So, after the electron has fallen in, you should know that the black hole ... | {
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java
Obviously the this.rules.get(i) on every iteration is inefficient, however as I need to maintain a counter, an enhanced for loop means keeping a separate counter and performing a check on it every time like so (list declaration skipped for space):
@Override
public boolean match(final InetAddress addr)
{
final... | {
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homework-and-exercises, elasticity, stress-strain
The question is saying that the stress in the narrow section of the composite bar is the same as in the uniform bar with which it is being compared. | {
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localization, navigation, gps, robot-localization
Comment by Gary Servin on 2014-08-20:
I finally went with using to separate ekf nodes, the first fuses twist and IMU using odom->base_link, the second fuses GPS, IMU and twist using map->gps_base_link (needed some topic re-stamping here to match the gps_base_link outpu... | {
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For part c): The sample space, containing all of the outcomes of the experiment that will take place, is $|N|=9870$. When it says that the thief won't use the same pair of digits in each try, does that not allow him trying the pin 8 5 2 1 in one try and the pin 8 2 5 1 in another try?
-
Ascending or descending is $14$... | {
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"openwebmath_score": 0.775648295879364,
"tags"... |
javascript, game, playing-cards
Suit and Rank are Value Objects from your domain. In which you can put more behavior. Now you can change relatively more easily from suit names to suit symbols for example.
As a rule of thumb if a property does not change during the life time of an object, do not calculate it in the o... | {
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} |
entanglement, experimental-realization
Method 2: you couple different qubits with a bus
In this method, you put many qubits in contact with a bus. This bus will mediate the interactions and can allow "in principle" to make any pair of qubits connected to this bus to interact to make a two qubit gate. This is much easi... | {
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functions • When I write "log(x)", I mean the natural logarithm (you may be used to seeing "ln(x)"). For centuries, logarithm was used to simplify calculations. Find an integration formula that resembles the integral you are trying to solve (u-substitution should accomplish this goal). Logarithmic Functions In this sec... | {
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"lm_q1_score": 0.9854964211605606,
"lm_q1q2_score": 0.812504271451398,
"lm_q2_score": 0.8244619199068831,
"openwebmath_perplexity": 2107.3554604779924,
"openwebmath_score": 0.5253328084945679,
"tag... |
java
Title: Counting the number of unique IP addresses in a very large file I made a test job to the position of Junior Java Developer. I did not receive any answer from the employer, so I would like to get a review here.
Task description
A simple text file with IPv4 addresses is given. One line is one address, someth... | {
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ruby, ruby-on-rails
...or create another method, if you fear overrides. Problem is, this approach could induce confusion (modifying in place a shipping address that is in fact a billing address without knowing it, for instance)
Solution without callbacks
Have an eye on DCI architecture. Some gems implement it. Using m... | {
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fourier-transform, wavelet, fourier-series, music, decomposition
Pros: Is fast, some algorithms are easy to understand, good quality in monophonic sounds.
Cons: Generally you'll need a very nice pitch track to splice in the right position, it is hard to do :-(, so if your pitch track fails or not work in Poliphonic so... | {
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When you do the sum, you sort of approximate the area with rectangles of base length equal to $1$. Draw the function $1/x^2$ and draw the rectangles with base length 1; you'll see that the area under the rectangles is much bigger than the area under the function $1/x^2$
Here is an illustration for the function $1/x$, ... | {
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"openwebmath_score": 0.7699971795082092,
"tag... |
the stack. This post was imported from blogspot.. Next, join the lower two points, and to define a lower line . Both are time algorithms, but the Graham has a low runtime constant in 2D and runs very fast there. There are numerous applications for convex hulls: collision avoidance, hidden object determination, and shap... | {
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"openwebmath_score": 0.45257630944252014,
"tags": null,
"... |
elements, hydrogen, density, noble-gases
A much less flammable choice would be water vapor which, with a molecular mass of $\approx \pu{18 Da}$, is only slightly less buoyant than methane at the same temperature and pressure. The obvious problem with water is that it's a liquid at ambient temperatures, which means i... | {
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"tags": "elements, hydrogen, density, noble-gases",
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vba, error-handling
Title: You're logged in, except it's an error I've automated downloading of data from a 3rd party website. The process involves logging into the site, downloading the data, then logging out - lather, rinse, repeat for each client.
The code is in VBA using Access as the host and Selenium Basic to ha... | {
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} |
xml
Originally posted by Chad Rockey with karma: 4541 on 2012-12-27
This answer was ACCEPTED on the original site
Post score: 1
Original comments
Comment by ChengXiang on 2012-12-27:
Thank you for the information, they are very helpful. | {
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programming, qiskit
I treated the circuits separately to obtain the results. I'm wondering is there a way I can simplify/shorten this code? Thanks for the help! How about something like this:
from qiskit.circuit import QuantumCircuit
def my_circuit(initial_gate_params, params):
circuit = QuantumCircuit(1)
circ... | {
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gazebo, ros-kinetic
My problem is that i don't know how to kill successfully the aforementioned process, ie., to perform basically CTRL+C.
If i call m_process->kill() i got in my onProcessFinished SLOT that the kill was successful: Process finished, exit code:9 status: 1, however the nodes are still running, the r... | {
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c++, beginner
Title: Basic TicTacToe implementation in C++ Just created my first C++ project, and wondering if I could get some feedback on where to improve? I might swap from arrays to vectors and add alpha beta pruning later, but wanted to first see where I can improve on the base code.
#include <iostream>
#include ... | {
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java, game, collision
if(this.velocity.y < 0) {
if(topLeft || topRight) {
this.velocity.y = 0;
ytemp = currRow * Tile.SIZE;
}
else {
ytemp += this.velocity.y;
}
}
else if(this.velocity.y > 0) {
if(bottomLeft || bottomRight) {
... | {
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} |
c#
static void SyncExample()
{
//Creates a Tick Engine that fires 50 ticks per Second
TickEngine.TickEngine engine = new TickEngine.TickEngine(tps);
//Set Event
engine.OnStart += (sender, e) =>
{
Console.WriteLine("[Sync] Started");
... | {
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} |
electromagnetic-radiation
$$dP=dIA=\frac{A\alpha}{\omega^4}d\omega$$
where $\alpha=\frac{e^2}{6\pi c}\left(\gamma\omega_p\right)^4$, considering the energy of a photon at a frequency $\omega$ is $E=\hbar\omega$ the number of photons at $\omega$ emmited per unit time for $dI$ is then
$$dN=\frac{A\alpha}{\hbar\omega^5}d... | {
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ros-melodic
And I am adding the plugin with:
<gazebo>
<plugin name="diff_controller" filename="libgazebo_ros_diff_drive.so">
<commandTopic>cmd_vel</commandTopic>
<odometryTopic>odom</odometryTopic>
<odometryFrame>odom</odometryFrame>
<odometrySource>world</odometrySource>
<publishOd... | {
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css, html5
nav
{
margin: 0;
padding: 0;
overflow: hidden;
background-color: navy;
}
nav a
{
float: left;
display: inline-block;
color: white;
text-align: center;
padding: 16px;
text-decoration: none;
}
... | {
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"openwebmath_score": null,
"tags": "css, html5",
"url": null
} |
black-holes, event-horizon
If you consider a slightly different case of two entangled particles, which are still a single quantum object i.e. described by a single wavefunction, then the calculations have lead some authors to very strange conclusions such as the existance of a firewall. | {
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quantum-field-theory, symmetry-breaking
In the UV, i.e. at short distances, the dimensionless couplings (and interactions) such as $\lambda$ are much more important than the positive-mass-dimension dimensionful couplings such as $\mu$.
It's still true that the high-energy theory wasn't exactly symmetric in the treatme... | {
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"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "quantum-field-theory, symmetry-breaking",
"url": null
} |
special-relativity, coordinate-systems, vectors
$$
U' = \Lambda U
$$
where it is understood that the components of $\Lambda$ are gathered together in a $4 \times 4$ matrix, and the lists of components $U$ and $U'$ are to expressed as the components of column vectors, and $\Lambda U$ is the ordinary matrix multiplicati... | {
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"tags": "special-relativity, coordinate-systems, vectors",
"url": null
} |
= +90Expected Output: x=0, y=4Actual Output: x=0, y=-4 Reply "Rotation of the coordinates" and "rotation of the coordinate axes" will reverse the direction of rotation. Let's let x prime, y prime be the coordinates of the point x, y after rotation. Rotation by an angle φ about the axis Oz = Ox3. Just use it. By putting... | {
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"openwebmath_score": 0.6907839775085449,
"... |
general-relativity, differential-geometry, tensor-calculus
$$\epsilon^{\large A_pC_{n-p}} \epsilon_{\large B_pC_{n-p}}$$
but :
$$\epsilon^{\large A_pC_{n-p}} \epsilon_{\large C_{n-p}B_p}$$
Where indices like $A_p$ means $a_1...a_p$
So, before applying general formulae concerning Levi-Civita tensor, you have to invert... | {
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"tags": "general-relativity, differential-geometry, tensor-calculus",
"url": null
} |
noise, algorithms, estimation, frequency-domain
Title: Idea for Noise Level Estimation / Automatic Thresholding in the Presence of Peaks I have the fft of some signal, and want a rough estimate of the noise level in order to choose an appropriate threshold for our peak detection algorithm. In general, the fft contains... | {
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"id": 7980,
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"openwebmath_score": null,
"tags": "noise, algorithms, estimation, frequency-domain",
"url": null
} |
To find the degree of a polynomial: Add up the values for the exponents for each individual term. Example: 5x, 6x + 3, 7x2 + 2x The D_____________ of a POLYNOMIAL is the greatest degree among the monomial terms of the polynomials. All About Polynomials. Polynomials in one variable should be written in order of decreasi... | {
"domain": "assistimi.it",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
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"lm_q1_score": 0.9845754488233528,
"lm_q1q2_score": 0.804963763409399,
"lm_q2_score": 0.8175744828610095,
"openwebmath_perplexity": 385.2108957500392,
"openwebmath_score": 0.7044321894645691,
"tags"... |
the instantaneous exchange rate of an amount with respect to time is proportional to the amount itself. To review continuous functions, see page 62, Exercises 60 and 61. Solve word problems involving exponential growth and exponential decay; Evaluate an exponential function at a given point (may be in Exponential Funct... | {
"domain": "libreriaperlanima.it",
"id": null,
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"lm_q1_score": 0.9852713852853137,
"lm_q1q2_score": 0.8374522814371483,
"lm_q2_score": 0.8499711794579723,
"openwebmath_perplexity": 1193.5853796587046,
"openwebmath_score": 0.3269873261451721,
... |
This is an overcount since it doesn't account for the condition $a < b < c$. First we should subtract the number of triples in which $a, b, c$ are not all distinct. There are 49 triples such that $a = b$: to count them, choose $x$ with $0 < x<50$, set $a = b = x$ and $c = 100-2x$. This accounts for all possible cases s... | {
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"lm_q1_score": 0.9828232889752296,
"lm_q1q2_score": 0.8232324112584049,
"lm_q2_score": 0.8376199673867852,
"openwebmath_perplexity": 110.50098260080557,
"openwebmath_score": 0.913634717464447,
"tag... |
thermodynamics
In order to compute the entropy of this reaction, you need to know the standard molar entropy of each species. The easiest thing to do is to look it up in a trustworthy reference source, for example a NIST database or CRC Handbook of Chemistry and Physics.
$$
\begin{array}{|c||c|}
\hline\hline
\text{sub... | {
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"openwebmath_score": null,
"tags": "thermodynamics",
"url": null
} |
transform
Title: recieve all data from tf message
listener.lookupTransform('/frame1', '/frame2', rospy.Time(0))
function works with 2 frames, so if i need to know all frames positions, relative to frame1, i have to call "lookupTransform" for each frame? Is that right way?
I mean, if i have 10 frames, i should call l... | {
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"id": 21702,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "transform",
"url": null
} |
entanglement
Title: How to check entanglement for multipartite states? While that question is only asking two-qubit, I'm asking with any size qubit in general about how to check if qubit with any size in entangled state?
For example is this 3-qubit in entangled state?
$\frac{1}{\sqrt{2}}(|010\rangle + |101\rangle)$
I ... | {
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"openwebmath_score": null,
"tags": "entanglement",
"url": null
} |
sequence-alignment
I prefer a tool that is packaged on bioconda. A tool that also does protein and RNA sequences is even more preferable. You are looking for the needle program from the EMBOSS suite. Available in bioconda.
http://emboss.sourceforge.net/apps/release/6.6/emboss/apps/needle.html
To read sequences from t... | {
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"id": 794,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "sequence-alignment",
"url": null
} |
vba, excel
Private Sub ArrangeFrames()
Dim vItem As Variant
Dim lTopRow As Long
If Not VisibleFrames Is Nothing Then
If VisibleFrames.Count > 0 Then
lTopRow = pStartPosition
For Each vItem In VisibleFrames.Items
vItem.Top = lTopRow... | {
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"id": 37513,
"lm_label": null,
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"lm_q1q2_score": null,
"lm_q2_score": null,
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"openwebmath_score": null,
"tags": "vba, excel",
"url": null
} |
in a different cell, each color represented a! Have chosen different variants of each component respectively can one become good at Data structures and Algorithms easily and to... Themselves strongly connected component be certain you 've found all components link code. ) – an undirected graph is strongly connected com... | {
"domain": "tunigite.com",
"id": null,
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"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9814534322330057,
"lm_q1q2_score": 0.813564838538191,
"lm_q2_score": 0.8289388083214155,
"openwebmath_perplexity": 709.5981566279488,
"openwebmath_score": 0.37950268387794495,
"tags... |
python, python-3.x, file
emmpty, serach
Please use a spell checker plugin in your IDE.
# ToDo: consider (a) parameter(s) to indicate that lines must start with,
# or be equal to, a search string, rather than just containing?
# That would make this even more generic, but would require (an) extra parameter... | {
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"openwebmath_score": null,
"tags": "python, python-3.x, file",
"url": null
} |
condensed-matter, quantum-information
Title: Exact diagonalization of a random-field Heisenberg Model I am working with the random-field Heisenberg model:
$$
H = \sum_{j=1}^L\left[J\, \vec{S_j}\cdot \vec{S_{j+1}} - h_jS_j^z\right].
$$
I am interested in the phenomenon of many-body localization, and so I need to exactl... | {
"domain": "physics.stackexchange",
"id": 91185,
"lm_label": null,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "condensed-matter, quantum-information",
"url": null
} |
quantum-field-theory, mass, perturbation-theory, higgs
This topic came up because I am doing research in QFT with him and in the book we're using I recently got to the part where it describes self-interactions and Yukawa interactions of fields (not yet quantized) using perturbative analysis. So, my professor used the ... | {
"domain": "physics.stackexchange",
"id": 96218,
"lm_label": null,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "quantum-field-theory, mass, perturbation-theory, higgs",
"url": null
} |
game, objective-c, ios, cocoa-touch
typedef struct {
ChessboardRow row;
ChessboardColumn column;
} ChessboardSquare;
I think it would be very beneficial to spend a lot of time studying the delegate/protocol pattern and write some unrelated practice projects dealing with UITableView and UICollectionView and re... | {
"domain": "codereview.stackexchange",
"id": 7731,
"lm_label": null,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "game, objective-c, ios, cocoa-touch",
"url": null
} |
human-biology, microbiology, teeth
Is plaque formed even when one does not eat any food?
Citations of scientific literature are welcome.
But I always assumed that plaque is formed by food remains in the mouth | {
"domain": "biology.stackexchange",
"id": 8796,
"lm_label": null,
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "human-biology, microbiology, teeth",
"url": null
} |
particle-physics, experimental-physics, terminology
Define “truth” objects, e.g. stable particles entering the detector, as close as possible to physics objects reconstructed in the detector
It seems to be an effort to understand detector effects better than up to now.
i.e "true" particles from the interaction verte... | {
"domain": "physics.stackexchange",
"id": 50542,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "particle-physics, experimental-physics, terminology",
"url": null
} |
ros, navigation, base-link, robot-pose-ekf, base-footprint
Location:
/tmp/buildd/ros-indigo-robot-pose-ekf-1.11.11-0trusty-20140805-0105/src/odom_estimation_node.cpp:OdomEstimationNode::imuCallback:234
---------------------------------------------------------------------------------------------------- | {
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"id": 19406,
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"openwebmath_score": null,
"tags": "ros, navigation, base-link, robot-pose-ekf, base-footprint",
"url": null
} |
statistics, measurement, hypothesis-testing
Here we see the curve of ADEV going down 1 decade for every decade of time along the horizontal axis; this is a $1/\sqrt{\tau}$, where $\tau$ is the units of time along the horizontal axis, out to about 300 to 600 seconds. This means out to this time duration, the underlying... | {
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"id": 12461,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "statistics, measurement, hypothesis-testing",
"url": null
} |
python, performance, python-2.x, random, simulation
Now to why I'm here on Code-Review in the first place with this monster. I feel I have whittled down some of the major performance issues, but fresh eyes tend to see things that I miss. I'm also looking to make things more Pythonic and readable. One thing I originall... | {
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"id": 29698,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "python, performance, python-2.x, random, simulation",
"url": null
} |
computability, closure-properties, semi-decidability
For starters, we can construct a decider for the language $L$. Given any string $w$, we can use it as input for both $M_L$ and $M_{L^C}$. $M_L$ will halt and accept if $w$ is in $L$ (and halt and reject or loop forever if not). Conversely, $M_{L^C}$ will halt and ac... | {
"domain": "cs.stackexchange",
"id": 4788,
"lm_label": null,
"lm_name": null,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "computability, closure-properties, semi-decidability",
"url": null
} |
navier-stokes, solid-mechanics
Title: Is it possible to use the Navier-Stokes equation for solid simulation? I had a PhD interview yesterday. One of the faculty asked me if it is possible to use a modified version of the Navier-Stokes equation for solid simulation, knowing that both are derived from Newton's law of mo... | {
"domain": "physics.stackexchange",
"id": 79579,
"lm_label": null,
"lm_name": null,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "navier-stokes, solid-mechanics",
"url": null
} |
quantum-chemistry
$$
\phi_1=e^{-\alpha_{11}r^2}
$$
Again the overlap matrix has a form like above matrix.
Are the mentioned explanations true? How should we apply these differences in a Mathematica code? A lot of stuff is going on in this question. So for clarity let's make this answer very explicit. We can try to con... | {
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"id": 10328,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "quantum-chemistry",
"url": null
} |
special-relativity, group-theory, representation-theory, poincare-symmetry, invariants
Title: Casimir of $SO(3)$, $SO(2)$, $IO(1,3)$, $T(4)$ It is known that $SO(3)$, a semisimple group of rank 1, has one Casimir $J^2$, and one can use this information to classify its irreps with the eigenvalues of $J^2$ and $J_3$: $(... | {
"domain": "physics.stackexchange",
"id": 74976,
"lm_label": null,
"lm_name": null,
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"tags": "special-relativity, group-theory, representation-theory, poincare-symmetry, invari... |
Specifically, I've found that, if you have an underdetermined system, (i.e., n independent equations with at least n+1 unknowns), and specify exactly n of the unknowns in the list of variables, then Solve will attempt to solve for those n variables while simultaneously eliminating them from all of the resulting express... | {
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"lm_q1_score": 0.9632305307578323,
"lm_q1q2_score": 0.8298599050262075,
"lm_q2_score": 0.8615382076534743,
"openwebmath_perplexity": 2591.673933182514,
"openwebmath_score": 0.5441804528236389,
"tag... |
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