I have a coding problem for which I have attempted to solve with the below coding. However, my program is assessed as too slow in its execution and thus needs to be optimized to reduce the execution time. Please help me in optimizing my program and reducing the execution time.
Problem definition...
@ckuhn203 and then a bunch of Questions show up all over the place that need flagging along with some comments, I think I placed like 4 flags or something like that
I have a few classes that use boost accumulators. I am currently typedef'ing them anew everywhere they are needed like so:
typedef boost::accumulators::accumulator_set< double, boost::accumulators::stats<
boost::accumulators::tag::mean> > MeanAccumulator;
What would be a good way to pa...
Just been putting together an audio meter by stacking bootstrap progress bars - http://getbootstrap.com/components/#progress-stacked and thought there is probably a better way, mathematically / logically, of achieving this?
levels = (vumeter) ->
green = if vumeter % 50 < vumeter then 50 else v...
What happens, is that he edits every question, and the asker thinks: who's so special that they think they know what I mean better than me...? so they click to look, and Jamal profits ;-)
Alice and Bob are playing a game called "Stone Game". Stone game is a two-player game. Let N be the total number of stones. In each turn, a player can remove 1, 2 or 3 stones. The player, who picks the last stone, wins. They follow the "Ladies First" norm. Hence Alice is always the one to make the first move. Your task is to find out whether Alice can win, if both pla…
Problem:
Each new term in the Fibonacci sequence is generated by adding the
previous two terms. By starting with 1 and 2, the first 10 terms will
be:
1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ...
By considering the terms in the Fibonacci sequence whose values do not
exceed four milli...
JavaFX Related
main() method : in Dashboard.java You do not need it. It's an IDE bug, It's only required for old IDEs. (I recommend using the latest NetBeans, version 8)
Use Toggle Buttons : in DashboardController.java you are doing
switch (generalButton.getText()) I suggest using ToggleButton...
I've just created my first tests using mock classes. So far my tests are running much faster and now I guess I'm solely focusing on a single class (in this case I'm testing UserTable and mocking the DatabaseAdapter instance I inject into it)
I haven't proceeded to do the write tests for the othe...
Description of the Readers–writers problem.
It looks like it works, but I have some doubts:
class ReadWriteBuffer<T> {
private static final Object writeLock = new Object();
private static final Object readWriteLock = new Object();
private int numberReaders = 0;
private int n...
^^^ implies the purpose of the code is to have read and read/write locks for the express purpose of concurrent usage, that is what the class is obviously supposed to do.... but it does not.
Just because testing for failure is hard, does not make it less broken.
2
I have a 'thing' with people who have code that works fine, in multi-threaded Java, but on a single memory controller, or even more, a single core.
when I use that code on a P750 with 4 sockets, 64 cores, 8 memory controllers, then the NUMA, and cache-line cleaning and other effects, things fall apart.
Meme: ho-ho-ho-napalm
Originator: Janos
Cultural Height: The 2nd Monitor
Background: Santa + Napalm Strike combo: you have upvoted (justifiably!) a question and all the answers on it. Declaring ho-ho-ho-napalm in chat indicates that you've just done this, on a question that's being discussed,...
Let's say that a website allows users to create profiles wherein, they can enter their social media links like - pinterest, YouTube, facebook etc.,
Are there any drawbacks for asking users just the enter the "handle" as opposed to the entire URL?
For example:
http://www.youtube.com/ [enter hand...
I will get superb female vocals in the next week or two, doing a cool remix of House of the Rising Sun and will then release a digital single, that's going to be exciting :D
I just saw this
this.viewportOffset = {
//offsets before and after resizing may be different in a responsive website
// (thinner <p> increases its height due to word-wrap, etc.)
oldTop: 0,
oldBottom: 0,
top: function () {
this.oldTop = that.documentOffset.top() ...
No problem. I took your problem-space and mocked up a remote camera, and then built a datagram comms unit to talk to it... ;-)
It's been a while since I worked with UDP.
I put together what I believe is an as-reliable-as-reasonable solution that allows you to get good timeout processing, without leaving hanging threads.
This is a single class and dependency free unit test framework for Java. The only assertion available is assertTrue (this can be used for all test cases).
What it does
Execute all methods with annotation Test. should fail if any arguments are needed.
Calculate elapsed time using a given repea...
Thanks to your insight I'm working on a new method that replaces all of the above code with more generalized code. Did I mention that our cameras all have at least 12 bit digitized resolution? I have not been able to talk to our engineer but think that if a command times out there's a serious problem and a hot reset is in order.
I provide one of two nio bytebuffers for responses. One for the image data 480 x 640 pixels as shorts and a shared 16 byte for all else. I've accepted your answer, BTW.
To improve my programming style, I have been writing solutions for popular code katas. I have a written a partial solution for the Berlin Clock kata. I've been trying to follow the SOLID Principles. I have found an issue with the solution because ordering of the returned lamps is incorrect. Can a...
There's a gap between the receipt of the image and requesting the next. The image data need to be copied to a form that ImageJ can use. i plan that the rest of the processing will be in a different thread. What will happen is that as soon as the image has been received i'll give a command to position the next filter (unless only one filter is being used) that can take nearly 800 ms.
As soon as that comand has been issued the image data are transferred to an ImageJ buffer and processing ensues. I can then reset the buffer and wait until the filter is positioned and ask for another image etc.
We don't know the timing on that yet. I need to request position and attitude data from the INS and create two real images: an annotated TIFF with raw data and one or two JPEGS
The JPEGS will be 32 bit images with false color to show landscape fire heat levels and retardant drops if any. Other software needs images from a particular band but the operatior may want to look at any one of the 4 bands.
My computer has an intel i7 CPU, 4 cores and two hardware threads per core. It's completely solid state and designed for aircraft (or ship, or vehicle) use.
I'm using Ubuntu 14.04 server, The newest Eclipse, and Java 8.
On the aircraft the computer will be 'headless' and all communications via a web page.
I think Java Project Valhalla (scheduled Java 10 I guess), can have real unsigned ints though... If implemented as a Value Type, you could perhaps do the conversion at construction time
I have data that are from C and are unsigned shorts (mainly) and some unsigned ints. it takes a lot of care (and cost CPU clycles) to do arithmetic on the shorts.
Eg: if a linkedlist contains 2->3->1->3->4 then the result should be 2->3->1->4. Notice that 3 has been eliminated
This code is attributed to geeksforgeeks. Looking for code-review, optimizations and best practices.
public class EliminateDuplicateUnsortedLL<T> {
private Node<T> first;
...
Jonah's answer really doesn't address the architectural issue with your code. Yes, he makes valid points about your presumptive casts, but honestly, if this is what your company is talking about when they say your code has "architecture issues", I'd be a little amazed.
The primary problem that ...
The code looks good and it's been improved in multiple ways (argparse, index file opened just once, dry-run flag instead of debug one, ...). Hence, this review is going to focus in small details:
Please add docstrings to document the code. This will make the code more readable and make easier t...
I am new to iOS development. I wrote this code, but the company said that this is bad architecture and is not acceptable. I want to improve this code.
UITabBarController * tab = (UITabBarController *) self.window.rootViewController;
UINavigationController * nav = (UINavigationController *) [[t...
It seems like it, also judging my the code given. However, they may not want the answers since they're mostly critiques. I think it could just be closed here if anything.
I just saw this
this.viewportOffset = {
//offsets before and after resizing may be different in a responsive website
// (thinner <p> increases its height due to word-wrap, etc.)
oldTop: 0,
oldBottom: 0,
top: function () {
this.oldTop = that.documentOffset.top() ...
this morning, I had left the comment requesting more context so that a better answer could be given... and then someone else posted an answer anyway.
The posted answer is actually on-topic (as an answer, doesn't make the question on-topic), but the posted answer misleadingly suggests that it is making architecture level recommendations, despite doing nothing of the sort.
I think what bothers me the most is that he came here asking about architecture because his company said his code had architecture problems. He clearly doesn't understand what they mean and want some help. That's fine. But the currently accepted answer doesn't address architecture at all, despite claiming to, and it was so quickly marked as accepted.
Now this guy will go to work and change his code based on the accepted answer, and his boss will go "Okay, that's slightly better, but you didn't address the architecture at all," unless his boss is an idiot and completely misused the word architecture in the first place.
The OP could be told about that, though it may not sway his opinion. I probably should've closed it right away, but I suppose I wasn't sure if that was enough code to review otherwise.
But the fact that there actually is an architectural problem, and the fact that Jonah's answer isn't something you'd really worry a WHOLE lot about typically (unless his boss is being extremely pedantic) makes me think his boss probably isn't an idiot and he really probably needs to address the issue my answer points out.
No, the other answer was accepted before mine was posted.
The question was posted 18 hours ago. I posted a comment asking for some more information 10 hours ago.
Jonah's answer was posted 5 hours ago, and was accepted at least 3-4 hours ago (there's no time stamp on the accept, but I looked at it earlier today and I never saw Jonah's answer posted and unaccepted).
Then I posted my answer an hour ago. And the only reason I posted an answer at all was because I felt that Jonah's answer completely missed the mark on what was actually being asked about and was concerned that the OP already accepted it.
I know he can change the accepted answer, and I'm not actually concerned with whether or not mine is marked as accepted. It's mostly just a little bothersome to me that someone thinks they could answer the question in the state it was in.
Hello there I am looking for improvements and better AI design etc for a game I'm making I also included the game in the article with a youtube video of it etc codereview.stackexchange.com/questions/59737/…
I'm not asking you from the perspective of a computer engineer, a language author, a compiler, an optimizer, etc. I'm asking you from the perspective of a programmer who is trying to learn a new language.
i'm trying to make a simple console application game. the code is a bit messy and i hope anyone can point out if there's something not right. Alternatively, i'm also looking for a way to sum up users' input and add them up separately. For example, round 1: player1 got x points, player2 got y poin...
It does omit it after the script is read and by default it is [Args("true")] which would mean you have to set it to false if you don't wish to use it.
However if you mean it should set it to "true" if you don't use the @Args variable then I would say that will be done eventually but right now this minute that is not done.
But as I stated it is not needed you can simply forget about ever using it and you will never have a problem
Yea I will of course make it flip it based on if you use the @Args or not but that is not the way it works right now in the current beta.
Also it is debatable if it can ever truly be detected.... Since Sputnik is extremely dynamic and people can spawn source code at runtime
So omitting it could be disastrous but that remains to be seen.
The reason I haven't looked into flipping the [Args("true/false")] switch automatically yet is because the user can do Eval() and other statements where strings or files can be loaded into the function as if it was physical code in the function and if that spawned code uses the @args when the preprocessor has disabled it since it couldn't see it being used.... You get the idea?
I will find an optimal solution for it eventually though.
But again the effect of it is so small it doesn't exactly matter in the grand scheme of things and can be left out permanently with no problem.
You should probably create a language that is better for the lowest common denominator user. A language that is easier for inexperienced users to write good code with is far more valuable than a language that makes it easier for highly knowledgeable computer engineers to write fast, memory-efficient code...
For example, in basically any IDE with an interface builder, when you drag a button onto the interface, by default the button is enabled, because 99.9% of all users who use a button want it to be enabled.
And I should certainly be able to completely omit it and still get the optimal result from my code because there's a good chance I'm coming from a language that has nothing like that at all, so I'm not going to use it and I don't know I need to do something special to make my code run faster.
I am not familiar with this language (no one is), but I will make some comments about the readability of your code. These are sort of general blanket statements that could be applied to any language, and definitely can be applied here.
The only time you ever wrap an if, else, or loop's body i...
I have a few classes that use boost accumulators. I am currently typedef'ing them anew everywhere they are needed like so:
typedef boost::accumulators::accumulator_set< double, boost::accumulators::stats<
boost::accumulators::tag::mean> > MeanAccumulator;
What would be a good way to pa...
Just been putting together an audio meter by stacking bootstrap progress bars - http://getbootstrap.com/components/#progress-stacked and thought there is probably a better way, mathematically / logically, of achieving this?
levels = (vumeter) ->
green = if vumeter % 50 < vumeter then 50 else v...
Problem:
Each new term in the Fibonacci sequence is generated by adding the
previous two terms. By starting with 1 and 2, the first 10 terms will
be:
1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ...
By considering the terms in the Fibonacci sequence whose values do not
exceed four milli...
Description of the Readers–writers problem.
It looks like it works, but I have some doubts:
class ReadWriteBuffer<T> {
private static final Object writeLock = new Object();
private static final Object readWriteLock = new Object();
private int numberReaders = 0;
private int n...
How to create Alphabet M using astricks using java by using nested for loop
Meme: ho-ho-ho-napalm
Originator: Janos
Cultural Height: The 2nd Monitor
Background: Santa + Napalm Strike combo: you have upvoted (justifiably!) a question and all the answers on it. Declaring ho-ho-ho-napalm in chat indicates that you've just done this, on a question that's being discussed,...
I just saw this
this.viewportOffset = {
//offsets before and after resizing may be different in a responsive website
// (thinner <p> increases its height due to word-wrap, etc.)
oldTop: 0,
oldBottom: 0,
top: function () {
this.oldTop = that.documentOffset.top() ...
Eg: if a linkedlist contains 2->3->1->3->4 then the result should be 2->3->1->4. Notice that 3 has been eliminated
This code is attributed to geeksforgeeks. Looking for code-review, optimizations and best practices.
public class EliminateDuplicateUnsortedLL<T> {
private Node<T> first;
...
Jonah's answer really doesn't address the architectural issue with your code. Yes, he makes valid points about your presumptive casts, but honestly, if this is what your company is talking about when they say your code has "architecture issues", I'd be a little amazed.
The primary problem that ...
The code looks good and it's been improved in multiple ways (argparse, index file opened just once, dry-run flag instead of debug one, ...). Hence, this review is going to focus in small details:
Please add docstrings to document the code. This will make the code more readable and make easier t...
I am new to iOS development. I wrote this code, but the company said that this is bad architecture and is not acceptable. I want to improve this code.
UITabBarController * tab = (UITabBarController *) self.window.rootViewController;
UINavigationController * nav = (UINavigationController *) [[t...
