robot | 🤖 A functional , immutable Finite State Machine library | Functional Programming library
kandi X-RAY | robot Summary
kandi X-RAY | robot Summary
A small functional and immutable Finite State Machine library. Using state machines for your components brings the declarative programming approach to application state. See thisrobot.life for the main documentation.
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Top functions reviewed by kandi - BETA
- Transitions to a service .
- Create a new machine
- Create a new state instance .
- Send an event to the service .
- Invokes a function within a Promise .
- Create a new transition .
- Interpret a connection .
- Load several users
- Convert transitions into a map .
- stack a function
robot Key Features
robot Examples and Code Snippets
Lines of Code : 5License : Permissive (MIT License)
Copydef __init__(self):
self.velocityX=4
self.velocityY=4
self.X=random.randint(0,768)
self.Y=random.randint(0,350) @GetMapping("/teapot")
@ResponseStatus(HttpStatus.I_AM_A_TEAPOT)
public void teaPot() {
} public void setNumberOfCarsInPark(Integer numberOfCarsInPark) {
this.numberOfCarsInPark = numberOfCarsInPark;
} Community Discussions
Trending Discussions on robot
QUESTION
I have an spring boot app, which contains an angular front
like this:
src/main/resources/static/zanori2
Where in zanori2 I have the result of ng build some like:
index.html, index.js, favico.ico and so on
I tried this resourceHandle:
...ANSWER
Answered 2022-Apr-02 at 10:49Spring will automatically search in a number of places for paths which aren't matched by any controllers or other settings in the web config. These locations are currently checked by default:
QUESTION
if running our lint checks with the python black pkg. an error comes up
ImportError: cannot import name '_unicodefun' from 'click' (/Users/robot/.cache/pre-commit/repo3u71ccm2/py_env-python3.9/lib/python3.9/site-packages/click/__init__.py)
related issues:
https://github.com/psf/black/issues/2976
https://github.com/dask/distributed/issues/6013
ANSWER
Answered 2022-Mar-30 at 08:58This has been fixed by Black 22.3.0. Versions before that won't work with click 8.1.0.
https://github.com/psf/black/issues/2964
E.g.: black.yml
QUESTION
Let me introduce the following three classes: AbstractProcessor and these two child classes. The code below is not complex because there are only two child classes, but what if procedures1 and procedure2 both has many N candidate implementation? In such case, there are NxN child classes and a lot of duplication will be made by hand-coding. In the code below for example, each procedure can either be fast one or accurate one. So there are 2x2 possible child classes.
I would ask about technique/design pattern to reduce duplication. More precisely, is there any technique to reduce that NxN hand-coding to 2N hand-coding?
Noting that procedure1 and procedure2 both have to share the same var_ (in my case it is measurement value of physical world of robot) and the common function foo(), procedure1 and procudure2 can hardly be composed by a has-a relationship. Actually in my application, there are lot of var_ because the robot access to many type of sensors.
ANSWER
Answered 2022-Feb-09 at 08:09Inheritance is not the solution to everything. Sometimes all the problems are gone once you don't use inheritance. There are many different ways to do what you want. One is to store the callables as members:
QUESTION
In my UML model I have a system and its subcomponents that talk to each other. For Example, I have a computer and a RC robot where they talk via Bluetooth. Currently in the diagrams the flow is something like:
"Computer" triggers "setVelocity()" function of "RC car".
At this point, I want to refine the communication by saying that
- computer sends "Movement" message
- with velocity field is set to 100 and direction field is set to 0
- which is acknowledged by RC car by sending ACK message
- with message id "Movement" and sequence number X.
How do I do that?
EDIT: Clarification
Normally this is what my diagram looks like without protocol details:
But when I tried to add messages, there are at least 2 problems:
- It seems like Computer first triggered the setVelocity() funciton and then sendBluetoothMessage() sequentially which are not sequential . The followings of setVelocity() are actually what happens inside that.
- sendBluetoothMessage() is actually a function of Computer. But here it belongs to RC Car. (or am I wrong?) And the same things for ACK.
Thanks for the responses. You are gold!
...ANSWER
Answered 2022-Jan-29 at 17:48There are two main ways of representing the sending of a movement message between two devices:
A
movement()operation on the target device, with parameters for the velocity and direction. You would typically show the exchange in a sequence diagram, with a call arrow from the sender to the receiver. The return message could just be label as ACK.A
«signal» Movement: Signals correspond to event messages. In a class diagram, they are represented like a class but with the«signal»keyword:velocityanddirectionwould be attributes of that signal.ACKwould be another signal. The classes that are able to receive the signals show it as reception (looks like an operation, but again with «signal» keyword).
In both cases, you would show the interactions of your communication protocol with an almost identical sequence diagram. But signals are meant for asynchronous communication and better reflect imho the nature of the communication. It's semantic is more suitable for your needs.
If you prefer communication diagram over interaction diagrams, the signal approach would be clearer, since communication diagrams don't show return messages.
Why signals is what you need (your edit)With the diagrams, your edited question is much clearer. My position about the use of signals is unchanged: signals would correspond to the information exchanged between the computer and the car. So in a class diagram, you could document the «signal»Movement as having attributes id, velocity and direction:
In your sequence diagram, you'd then send and arrow with Movement (X,100,0). Signal allows to show the high level view of the protocol exchanges, without getting lost on the practical implementation details:
The implementation details could then be shown in a separate diagram. There are certainly several classes involved on the side of the computer (one diagram, the final action being some kind of sending) and on the side of the car (another diagram: how to receive and dispatch the message, and decode its content). I do not provide examples because it would very much look like your current diagram, but the send functions would probably be implemented by a communication controller.
If you try to put the protocol and its implementation in the same diagram, as in your second diagram, it gets confusing because of the lack of separation of concerns: here you say the computer is calling a send function on the car, which is not at all what you want. The reader has then difficulty to see what's really required by the protocol, and what's the implementation details. For instance, I still don't know according to your diagram, if setVelocity is supposed to directly send something to the car, or if its a preparatory step for sending the movement message with a velocity.
Last but not least, keep in mind that the sequence diagram represents just a specific scenario. If you want to formally define a protocol in UML, you'd need to create as well a protocol state machine that tells the valid succession of messages. When you use signals, you can use their name directly as state transition trigger/event.
QUESTION
I am trying to find the end-effector spatial velocity Jacobian for a robot with a free-floating base. Due to the free-floating base, the jacobian should contain a base component and a manipulator comment (see https://spart.readthedocs.io/en/latest/Tutorial_Kinematics.html#jacobians)
V_ee = end-effector spatial velocity
J_b = base jacobian component
J_m = manipulator jacobian component
v = generalized velocities
V_ee = [J_b, J_m] v
Until now, I was using SPART toolbox to do this in Matlab (https://github.com/NPS-SRL/SPART) and now I am moving to Drake. I tried using CalcJacobianSpatialVelocity in the MultiBodyPlant and the manipulator Jacobian is correct when compared to SPART. However, the base component of the Jacobian is all zeros. This is different from what I expected and from SPART as for a free-floating base, the base velocities contribute to the end-effector spatial velocities.
An example reproduction of this issue can be found here: https://colab.research.google.com/github/vyas-shubham/DrakeTests/blob/main/freeFloating/computeJacobian.ipynb
I think I'm either doing one of these wrong while using Drake:
- Using the CalcJacobianSpatialVelocity wrong. This is unlikely as the manipulator jacobian is correct and the base frame is also correct (only 1 frame in URDF).
- Making a wrong URDF for calculating Jacobians for Free-Floating base. Maybe I need to specify differently in URDF a floating-base for Drake to include this in the Jacobian computation?
ANSWER
Answered 2022-Jan-03 at 23:01Your code is taking the Jacobian of the chaser relative to the target; there is no floating base between them (so the jacobian wrt to the floating base should, indeed, be zero). I think, perhaps, that you want to make frame_A=world_frame?
QUESTION
I am trying to implement Google Sign-In in Vaadin 21 application + Spring Security using available tutorial for Vaadin 14.
Login view:
...ANSWER
Answered 2021-Nov-27 at 00:11This is the solution to the problem.
QUESTION
How can I convert an objects position in PyBullet to pixel coordinates & draw a line onto the frame using PyBullet & OpenCV?
We would like to do this because PyBullet native addUserDebugLine() function is not available in DIRECT mode.
ANSWER
Answered 2021-Nov-15 at 22:50After a lot of fiddling, I came to a solution. Playing with it for a while, I came to a point where it looked almost OK except for a rotation of the axes given by the yaw angle. So, I did a second call to computeViewMatrixFromYawPitchRoll but with the opposite yaw in order to compute the transformation for the axes. Unfortunately, I'm not sure about why this works... But it works! Note: base_pos, _cam_dist, _cam_yaw and _cam_pitch have been displaced into render() Note also: the up direction has been reversed too (don't ask why... :-) ) A pretty messy explanation, I must admit...
QUESTION
I am trying to write code for a robot simulation. For the direction, I have a DU:
...ANSWER
Answered 2021-Nov-04 at 23:50What you have there is a discriminated union defining 4 cases. There's no automatic way to understand rotating the values but you can write your own functions to achieve this:
QUESTION
We are using firebase phone authentication to authenticate our users. We've been using it for over a year now.
Today at 13:00 GMT, new users are receiving 17028 An invalid safety_net_token was passed after entering their phone number.
I tried to verify each of the causes I found on the firebase docs:
- Verifying the SHA1 and SHA256 on the firebase console (We use the fingerprints that are on the play store console)
- Verifying the package name
The last app update was on October 1st and since then thousands of users created an account with Firebase Auth and there were no configuration changes on the firebase console.
Upon looking at other StackOverflow questions, the error we are getting is not the same as 17028 A safety_net_token was passed, but no matching SHA-256 was registered in the Firebase console. Please make sure that this application's packageName/SHA256 pair is registered in the Firebase Console Even though it is the same error code, in our case, it says an invalid token was passed.
We are using firebase with react-native-firebase module.
EDIT: After disabling Android device verification API from Google Cloud Console the verification is now working but with no device verification. (Users have to verify they're not robots with a CAPTCHA).
...ANSWER
Answered 2021-Oct-18 at 08:05Update: It is working fine now, and the outage has been fixed.
It looks to be a firebase internal issue, and the only solution now is to disable "Android Device Verification" and all your users will see the Recaptcha page.
check https://status.firebase.google.com/ https://status.firebase.google.com/incidents/TYeQBVB4kkzyk2kE8vbP
QUESTION
I have a pipeline with the steps below:
- Create a Resource Group
- Create a Virtual Machine from an image
- Copy a Python project to VM created in the previous step
This Python project is an RPA (Robotic Process Automation). Now, I need to execute this Python project inside the VM and get the outputs from it to know what is going on, what the robot is doing. This robot read some sites and internal software.
Is there a way to execute a script inside a Virtual Machine from a Pipeline and get its console outputs? Any clue?
I saw this running on Jenkins.
...ANSWER
Answered 2021-Oct-13 at 04:06If you are having Microsoft host the VM for you, there may be a way to "talk" to said VM as it is hosted on Microsoft's platform. However, the only way that I know of is to deploy an agent to the VM and select it as a resource target to run tasks on, such as copying your Python project and even running it.
Have you attempted this yet?
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