Dstar | Visualizes the workings of the D * path finding algorithm | Learning library
kandi X-RAY | Dstar Summary
kandi X-RAY | Dstar Summary
Visualizes the workings of the D\ path finding algorithm.*.
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Top functions reviewed by kandi - BETA
- Initialize the components
- Apply the flow spinner
- Start the grid
- Helper method to set the slider
- Draw the fill button
- Returns the direction of the tile
- Sets the size of the button
- Helper method to set the flowSpinner
- Sets the current speed of all pixels
- Set start stop button
- Set the connection point
- Updates the labels
- Set the size of the grid
- Randomize the tiles
- Run the grid
- Move the target state
- Move time to update
- Called when mouse is pressed
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QUESTION
I implemented a path planning algorithm based on D*-Lite. When I do not turn on optimization (-O0), the program can run normally. But when I turn on the optimization level (-O1/2/3), the program cannot be terminated. In Visual Studio, both debug mode and release mode can run normally. In the above cases, the codes are the same.I don’t know how to find the problem, can anyone help me?
...ANSWER
Answered 2020-Jul-30 at 07:54As you did not provide any code, we can give you only some general hints to fix such problems.
As a first assumption your code has definitely one or more bugs which causes what we call undefined behaviour UB. As the result is undefined, it can be anything and is often changing behaviour with different optimization levels, compiler versions or platforms.
What you can do:
enable really ALL warnings and fix them all! Look especially for something like "comparison is always...", "use of xxx (sometimes) without initialization", " invalid pointer cast", ...
try to compile on different compilers. You should also try to use gcc and/or clang, even on windows. It is maybe hard in the first time to get the environment for these compilers run on windows plattforms, but it is really worth to do it. Different compilers will give different warnings. Fixing all warnings from all compilers is a really good help!
you should use memory tracers like
valgrind
. I have not much experience on windows, but I believe there are also such tools, maybe already integrated in your development suite. These tools are really good in finding "of by x" access, access freed memory and such problems.if you still run into such trouble, static code analyser tools may help. Typically not as much as managers believe, because today's compilers are much better by detecting flaws as expected by dinosaur programmers. The additional findings are often false positives, especially if you use modern C++. Typically you can save the money and take a class for your own education!
Review, Review, Review with other people!
snip the problem small! You should spend most of your development time by setting up good automated unit tests. Check every path, every function in every file. It is good to see at minimum 95% of all branches covered by tests. Typically these tests will also fail if you have UB in your code if you change optimizer levels and or compiler and platforms.
using a debugger can be frustrating. In high optimized code you jump through all and nothing and you may not really see where you are and what is the relation to your code. And if in lower optimizer level the bug is not present, you have not really much chance to see find the underlying problem.
last but not least: "printf debugging". But this may change the behaviour also. In worst case the code will run always if you add a debug output. But it is a chance!
use thread and memory sanitizers from your compiler.
QUESTION
when I try to pull a particular href for a .zip file, all that is returned is #
I have stripped my script down so only the tricky part is left. When I run the script with the test html ( which is a copy of target site ) without using my opener.open it works fine. When I run it on the actual site, I only receive #.
Any help would be very much appreciated.
...ANSWER
Answered 2018-Aug-11 at 04:17You can use Selenium/Chromedriver to navigate the site dynamically and grab the href:
QUESTION
I want to call function by storing in dictionary. Actually, I will collect
...ANSWER
Answered 2017-Dec-24 at 12:06Functions are first-class objects in Python and so you can store them inside a dictionary. For example, if foo
and bar
are functions, and my_dict
is a dictionary, you can store the functions inside the dictionary in the following manner:
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