downward | The Fast Downward domain-independent classical planning system | Reinforcement Learning library
kandi X-RAY | downward Summary
kandi X-RAY | downward Summary
Fast Downward is a domain-independent classical planning system. Copyright 2003-2020 Fast Downward contributors (see below).
Support
Quality
Security
License
Reuse
Top functions reviewed by kandi - BETA
- Parse command line arguments
- Set search options for an alias
- Print usage information
- Check for mutually exclusive arguments
- Process command line arguments
- Return the name of the output file
- Updates the occurrence of a symbol
- Perform sanity check
- Validate the state
- Parse the raw config
- Dump the table
- Add a scatter plot
- Run the translator
- Adds comparison table
- Render the document
- Return a list of the title text
- Return a dictionary of configs that can be optimized to run
- Fill the categories
- Set categories to fit
- Return a list of paragraphs
- Return a list of tokens
- Return the plot
- Run a search
- Check for CMake - Tidy
- Run the program
- Convert a pddl to a SAS dataset
downward Key Features
downward Examples and Code Snippets
Lines of Code : 6License : Permissive (MIT License)
Copydef _heapify_down(self, index):
"""Fixes the heap in downward direction of given index"""
valid_parent = self._get_valid_parent(index)
while valid_parent != index:
self._swap(index, valid_parent)
index, Community Discussions
Trending Discussions on downward
QUESTION
I am working on a (Open)Modelica library for simulating chemical processes. With commercial tools it is a common approach that the mixture configuration (e.g. how many and which chemical components are involved like water, ethanol, ...) is defined once for the feed-stream and then this information is propagated via the streams to all the subsequent unit operations.
Unfortunately, so far I did not manage to use the powerful modelica language to achieve this functionality. The ideal situation would be to model a "Process" like this:
...ANSWER
Answered 2022-Mar-14 at 16:09AFAIK, this is not possible with (Open)Modelica alone, but some tools have been amended with an automation capability:
Automatic propagation of fluid models through the ports is not directly possible with the Modelica 3.4 specification, but might be supported by the Modelica tool. For example, in Dymola the option Advanced.MediaPropagation=1 can be set to apply automatic propagation of media models in a circuit.
Dymola video demonstrating this: https://www.modelon.com/propagating-replaceable-medium-automatically/
The Modelica Specification issue in case you would like to see this included in the language/reopen discussion: https://github.com/modelica/ModelicaSpecification/issues/240
QUESTION
I'm trying to create a flexbox that is both horizontally as vertically scrollable in case its needed. It's kind of a table layout in flexbox. In the picture below you can see the concept that I'm trying to achieve. This works correctly when the viewport is not too small or too short.
We can then resize the viewport. This works correctly for the vertical overflow. A scrollbar appears and we can scroll downwards. This sadly doesn't work correctly horizontally. We also get a scrollbar for the horizontal part. But the yellow rows (with test) are not the full width I need it to be.
...ANSWER
Answered 2022-Mar-19 at 02:36Every red and blue cells have a minimal width (with flex-basis and flex-shrink: 0) but not the yellow.
The yellow are using the largest width possible for them, but the others are going out their container.
In this situation, the simplest way to "fix" it is to set a minimal width to the yellow bars too.
A small example (with variables to simplify maintainability)
Diff:
QUESTION
I am in the process of creating a fiber threading system in C, following https://graphitemaster.github.io/fibers/ . I have a function to set and restore context, and what i am trying to accomplish is launching a function as a fiber with its own stack. Linux, x86_64 SysV ABI.
...ANSWER
Answered 2022-Feb-25 at 05:34Agree with comments: your stack alignment is incorrect.
It is true that the stack must be aligned to 16 bytes. However, the question is when? The normal rule is that the stack pointer must be a multiple of 16 at the site of a call instruction that calls an ABI-compliant function.
Well, you don't use a call instruction, but what that really means is that on entry to an ABI-compliant function, the stack pointer must be 8 less than a multiple of 16, or in other words an odd multiple of 8, since it assumes it was called with a call instruction that pushed an 8-byte return address. That is just the opposite of what your code does, and so the stack is misaligned for the rest of your program, which makes printf crash when it tries to use aligned move instructions.
You could subtract 8 from the sp computed in your C code.
Or, I'm not really sure why you go to the trouble of loading the destination address into a register, then pushing and ret, when an indirect jump or call would do. (Unless you are deliberately trying to fool the indirect branch predictor?) An indirect call will also kill the stack-alignment bird, by pushing the return address (even though it will never be used). So you could leave the rest of your code alone, and replace all the r8/ret stuff in restore_context with just
QUESTION
There are some other posts out there related to this one, such as these: Post 1, Post 2, Post 3. However, none of them deliver what I am hoping for. What I want is to be able to draw a line segment from a specific point (a sampling location) to the edge of a polygon fully surrounding that point (a lake border) in a specific direction ("due south" aka downward). I then want to measure the length of that line segment in between the sampling point and the polygon edge (really, it's only the distance I want, so if we can get the distance without drawing the line segment, so much the better!). Unfortunately, it doesn't seem like functionality to do this already exists within the sf package: See closed issue here.
I suspect, though, that this is possible through a modification of the solution offered here: See copy-pasted code below, modified by me. However, I am pretty lousy with the tools in sf--I got as far as making line segments that just go from the points themselves to the southern extent of the polygon, intersecting the polygon at some point:
ANSWER
Answered 2022-Feb-24 at 08:35Consider this approach, loosely inspired by my earlier post about lines from points
To make it more reproducible I am using the well known & much loved North Carolina shapefile that ships with {sf} and a data frame of three semi-random NC cities.
What the code does is:
- iterates via for cycle over the dataframe of cities
- creates a line starting in each city ("observation") and ending on South Pole
- intersects the line with dissolved North Carolina
- blasts the intersection to individual linestrings
- selects the linestring that passes within 1 meter of origin
- calculates the lenght via
sf::st_lenghth() - saves the the result as a {sf} data frame called
res(short for result :)
I have included the actual line in the final object to make the result more clear, but you can choose to omit it.
QUESTION
I'm trying to deploy a HA Keycloak cluster (2 nodes) on Kubernetes (GKE). So far the cluster nodes (pods) are failing to discover each other in all the cases as of what I deduced from the logs. Where the pods initiate and the service is up but they fail to see other nodes.
Components
- PostgreSQL DB deployment with a clusterIP service on the default port.
- Keycloak Deployment of 2 nodes with the needed ports container ports 8080, 8443, a relevant clusterIP, and a service of type LoadBalancer to expose the service to the internet
Logs Snippet:
...ANSWER
Answered 2022-Feb-05 at 13:58The way KUBE_PING works is similar to running kubectl get pods inside one Keycloak pod to find the other Keycloak pods' IPs and then trying to connect to them one by one. Except Keycloak does that by querying the Kubernetes API directly instead of running kubectl.
To do that, it needs credentials to query the API, basically an access token.
You can pass your token directly, if you have it, but its not very secure and not very convenient (you can check other options and behavior here).
Kubernetes have a very convenient way to inject a token to be used by a pod (or a software running inside that pod) to query the API. Check the documentation for a deeper look.
The mechanism is to create a service account, give it permissions to call the API using a RoleBinding and set that account in the pod configuration.
That works by mounting the token as a file at a known location, hardcoded and expected by all Kubernetes clients. When the client wants to call the API it looks for a token at that location.
Although not very convenient, you may be in the even more inconvenient situation of lacking permissions to create RoleBindings (somewhat common in more strict environments).
You can then ask an admin to create the service account and RoleBinding for you or just (very unsecurely) pass you own user's token (if you are capable of doing a kubectl get pod on Keycloak's namespace you have the permissions) via SA_TOKEN_FILE environment variable.
Create the file using a secret or configmap, mount it to the pod and set SA_TOKEN_FILE to that file location. Note that this method is specific to Keycloak.
If you do have permissions to create service accounts and RoleBindings in the cluster:
An example (not tested):
QUESTION
After starting Xcode 13.0, I get plenty of Position and size are ambiguous for ... and Width and horizontal position are ambiguous ... layout warnings on an app, which didn't show up on previous Xcode version some days ago (I didn't change anything after Xcode upgrade). Mentioned objects show properly on device and simulator. Checking in detail, it reveals that all constraints seem to be correctly set.
Above example is pretty straight forward. I don't really see what the reason for the warning could possibly be.
Even more weird ... when I change the name of a label somewhere at the top of the tableview, most of the warnings (not all) just disappear. This label is in a cell which is totally unrelated to the objects generating the warnings. After restarting Xcode, the warnings are back again.
Also Update Frames doesn't solve the issue.
Is this an Xcode bug or do I miss something?
--- UPDATE 1 (20.10.2021) ---
I noticed that the
Main.storyboardshowsambiguous="YES"for concerned objects. Manual delete (while Xcode 13.0 is closed) doesn't help.ambiguous="YES"is back upon next Xcode start.I noticed that all warnings refer to constraints of objects, located after tableview cell 16 downwards (spread across 4 sections). This can't be a coincidence.
Are there any limits in the number of allowed cells inside a tableview and/or section?
--- UPDATE 2 (21.10.2021) ---
Some more details. After lots of testing and reading still no solution.
The entire issue is about a tableview controller, having 7 sections with a variable number of cells (2, 2, 1, 12, 1, 3, 2). The warnings show only after cell #11 in section #4, hence cell #16 counted from the top (disregarding section boundaries).
Xcode shows many incoherences in terms of change/impact relationship as shown below.
There is a setting to disable warnings (TARGETS > Build Settings > IBSC_WARNINGS), but this doesn't change anything to the number of warnings shown. Manually (depreciated) delete of
ambiguous="YES"inMain.storyboardfile doesn't help. I don't see anything bad in giving that a try (after a backup ofMain.storyboard). The question probably boils down to why Xcode adds the ambiguous tag toMain.storyboardat a first place.The project shows a yellow warning symbol top right corner of tab bar, as well as 10 warnings right of the target/device bar (very top of Xcode window). Clicking on that one opens the Issue navigator showing the 10 warnings. The storyboard shows however a red error symbol right of concerned tableview controller. Inside this list, only errors and no warnings (so now, errors or warnings?). The number is 16 errors, while the number of warnings in the top bar of Xcode shows 10 warnings. Trying to
Add missing constraintsdoesn't do anything. My manually added constraints are apparently correct. See trivial example of OP (Reset settings). Lots of contradictory information across Xcode window.Changing the Document label (Identity inspector) of a switch belonging to a cell issuing a warning (e.g. cell #16), the total number of warnings goes down to 0! This label is only used by Xcode storyboard interface and doesn't show up on app UI. So why does it have an impact to constraint warnings? Non-related change solves a problem?
If the warning count is 0 due (3.) above, restarting Xcode brings all back to previous state = 10 warnings. Why 0 warnings after a settting change, then again 10 warnings after restart?
As said before, the mess starts in cell #16. However this one is a copy/paste from cell #15, which doesn't generate any warnings.
View Debugging (Frames, Alignment rectangles) shows the interface correctly - on device and simulator.
When the app runs, the layout is actually displayed exactly as designed. These warnings don't seem to have any impact on actual operation. Also they didn't show prior Xcode 13.0.
There are quite some issues regarding layout ambiguities online, but rarely any solution. Most of the time, the author resigns by just accepting the nuisance. My intention is understand why these occur and to to fix potential hidden issues (if any).
...ANSWER
Answered 2021-Dec-30 at 23:13I noticed the same bug on my app. It's happening in Static cells in TableView Controller, and ambiguous layout warning appears only for those cells that can be reached after scrolling down.
Steps I took to remove layout warnings:
- Select the view controller that shows autolayout warnings
- Inspectors > Size > Simulated Size > Freeform (see image below)
- Change height so that all cells are displayed
Now all those warnings are gone!
Xcode version: 13.2 (13C90)
QUESTION
EDIT [resolved]
based on the answer from Thingamabobs below, the approach simply turns out to be making sure the elements you spawn are allocated to correct parents.
It is worthwhile to create a frame just to hold every scrollable element since you can't move widgets around between parents when using pack/place. So a common parents between all movable elements will give you the freedom to move them around, again just create a holder frame. See the answer and discussion below for more details.
EDIT2
Bryan's answer below has very good info and an alternate approach using just a canvas. The core concepts still stand the same.
original question begins here
The situationSo based on this answer by Bryan, I used this approach to spawn widgets on a scrollable frame (which is basically a Canvas wrapping a frame inside as we know cause Frames don't have scroll attributes).
The widgets in this case are just tk.Buttons which I spawn in a loop using lambda to preserve state. That aspect is completely fine.
Now everything works fine except when I spawn more elements (again just buttons), they seem to be cut off. and I can't seem to scroll down to see the remaining ones. I am only able to scroll upwards only to see empty space.
please see the video below to see what I mean (excuse my horrible color choices, this is for a quick demo)
In the video, there are more elements below template47 but I can not scroll to them. I can scroll upwards but it's just lonely up there. All the names are actually buttons with zero bd and HLthickness.
To begin, my first instinct was to attach a ttk.scrollbar to the canvas+frame, which I did but observed the exact same behavior.
Then I tried to see if i could use .moveTo('1.0') to scroll down to last entry and then since upward scrolling works already, shouldn't have an issue. But this didn't do anything either. Still the elements were cut off, and it obviously messed up upward scrolling too.
I don't think I can use pack/grid geoManagers since as the answer by bryan i linked to above suggests, using place with its in_ arg is the preferred way. If it is possible otherwise, let me know though.
as depicted in the answer linked above, I also have two frames, and I'm using the on_click callback function to switch parents (a lot like in example code in answer). Turned out place was the best bet to achieve this. and it is, all of that aspect is working well. It's just the scroll thingy which doesn't work.
some code (dare i say MCVE)how i bind to mousewheel
...ANSWER
Answered 2021-Dec-27 at 14:37The main issue is that you are using place and with place you will be the allmighty over the widget, means there will be no requested size to the master or any other magic tkinter provides in the background. So I do recommand to use another geometry manager that does that magic for you like pack. Also note that I set the anchor to nw.
In addition it appears that you can only use the optional argument in_ in a common master. So the key of that concept is to have an holder frame that is used as master parameter and use the in_ for children that are able to hold widgets.
QUESTION
Many programming languages today have happens-before relation and release+acquire synchronization operations.
Some of these programming languages:
- C/C++11: happens-before, release+acquire
- Rust and Swift adopted the C/C++ memory model in its entirety — so they have that too.
- Java: happens-before, release+acquire.
I would like to know if release+acquire can violate happens-before:
- if it's possible, then I would like to see an example
- if it's impossible, then I would like to get simple and clear explanations why
release+acquire and happens-before
Release/acquire establishes happens-before relation between different threads: in other words everything before release in Thread 1 is guaranteed to be visible in Thread 2 after acquire:
ANSWER
Answered 2021-Nov-01 at 04:59I would like to know if release+acquire can violate happens-before.
Happens-before relationship cannot be "violated", as it is a guarantee. Meaning, if you established it in a correct way, it will be there, with all its implications (unless there is a bug in the compiler).
However, establishing just any happens-before relationship doesn't guarantee that you've avoided all possible race conditions. You need to establish carefully chosen relationships between relevant operations, that will eliminate all scenarios when data race is possible.
Let's review this code snippet:
QUESTION
I'm trying to understand the WebAssembly memory model, specially from the perspective of: what kind of risks I'm exposed to when sharing linear memory between WebAssembly instances? The basic memory model that all C/C++ => wasm tutorials gives us is as follow (the stack starts as __heap_base - 1 and grows downwards):
ANSWER
Answered 2021-Nov-01 at 15:39In a multi-threaded setup, each thread will get its own stack into the shared memory. The stack pointer (the creation of it seems to be done by LLVM createSyntheticSymbols) is placed into a WebAssembly global variable. Currently these globals are used as a thread-local storage. That means that each thread has its own global variable.
At the start of the WebAssembly instance, the main thread will have its own global variable pointing to the main thread stack into the shared memory. If you start another thread, during its startup time, its global variable will point to another place into the shared memory, where the stack for this thread is placed.
The allocation of the stack seems to be done by Emscripten __pthread_create_js if the caller does not supply its own pointer. The allocation of variables into the current stack is done here with stackAlloc where:
QUESTION
Question: You are climbing a staircase. It takes n steps to reach the top. Each time you can either jump 1 or 2 or 3 steps. In how many total number of ways can you jump to the top?
My Explanation: Well I'm thinking of applying recursion because I can find the solution by solving similar subproblems and on that process, there will be many overlapping subproblems so I'll array data structure to save the denomination of similar subproblems so that I don't need to solve same subproblem twice. So I'm using top down DP approach.
My Doubt:
Now to build the solution, I need a base case where the program flow ends and it returns back to it's parent node(if you visualize it as a tree). So the base case what I was thinking is like when I was at the floor, at ground 0 so there will be no other ways I can reach ground 0 state, so it's the base case.
When n=0, I should return 0 or 1, that's my doubt? Well I have written the code, so the code work when I return 1, not 0 at n=0. So why I should return 1 when n=0, what's the reason behind it? Please Help!!!
My Code:
...ANSWER
Answered 2021-Oct-27 at 16:54In these kind of problems of counting number of ways, dp[0][..] is usually equal to 1, as there're 1 way to jump 0 step, doing nothing.
And with your problem, as you already figure out this is a DP problem, it can be solve easily with a for loop, resembling similarities to the Tribonacci sequence (https://oeis.org/A000073) with different base cases starting point:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install downward
You can use downward like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
Support
Reuse Trending Solutions
Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items
Find more librariesStay Updated
Subscribe to our newsletter for trending solutions and developer bootcamps
Share this Page
