PolyM | PolyM is a very simple C++ message queue | Messaging library
kandi X-RAY | PolyM Summary
kandi X-RAY | PolyM Summary
PolyM is a very simple C++ message queue intended for inter-thread communication. There are three major requirement driving the design of PolyM:. PolyM (Polymorphic Message Queue) fulfills these requirements by usage of C++ move semantics.
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QUESTION
I want to compose a LitElement widget from two other widgets. The basic idea would be that one "selector" widget selects something, send an event to its parent "mediator" one, which in turns would update the related property in a "viewer" child widget (event up, property down). This follows the "mediator pattern" example of the documentation about composition, only that I need to deal with fully separated classes.
Below is a minimum working example, which builds and run in the LitElement TypeScript starter template project, with all dependencies force-updated with ncu --upgradeAll
.
The desired behavior would be that the Viewer widget does render the item["name"]
when the user selects something in the dropdown list.
So far, I managed to send an event up from the Selector to the Mediator, and to update the item_id
attribute within the Viewer. However, this does not seem to trigger an update of the item_id
property of the Viewer.
The approach used is to override updated
in the Mediator (l.36), loop through its children and do a child.setAttribute
, which is probably highly inelegant. There is surely another —cleaner— way, but I failed to clearly understand the update sequence of Lit.
ANSWER
Answered 2022-Mar-31 at 09:48You are setting the item only in the connectedCallback. Better you get the item dynamically via getter.
Regarding your question of setting an attribute of a slotted element, there is in my opinion no other way than programmatically.
QUESTION
I have a javascript function defined in polymer as such:
myTest(arg) {}
Inside this function, based on some conditions, I want to change the onclick
of a button defined in the polymer template to some other function. For this I'm doing document.getElementById('myButton').onclick = function() {myTest('someArg')};
The problem I'm having is that when the above line gets invoked I'm getting an error
Uncaught TypeError: myTest is not a function.
If I try to use the function keyword when declaring the function the compiler complains with
Unexpected token. A constructor, method, accessor, or property was expected.
What's the correct syntax to for changing the button's onclick function?
...ANSWER
Answered 2022-Mar-14 at 12:31It's hard to say for sure without seeing the the full source code example, but it sounds like the problem you're facing is related to JavaScript not inferring this
as the context for calling instance methods in the same way that e.g. Java does. To make things more complicated, this
wouldn't have the expected value inside the function
that you create for the click listener.
One way around that would be to use an arrow function since they aren't redefining the execution context:
QUESTION
We are using Vaadin Fusion, and are stuck for the time being with version 19. In this version it is not possible to add an NPM dependency that itself depends on Vaadin components.
E.g. if I have an app's package.json
like this:
ANSWER
Answered 2021-Aug-17 at 16:23Vaadin 19 requires vaadin-button version 2.4.0. Your addon requires the same version so there is no conflict and only one version will be used.
Vaadin 20.x.x requires vaadin-button version 20.x.x. which is not compatible with your addon.
The easiest solution is to bump the version of the vaadin-button in your addon to 20:
QUESTION
I have a 2D numpy array containing integers. My goal is to find the index of the array(s) that do not contain a given value (using numpy functions). Here is an example of such an array, named ortho_disc
:
ANSWER
Answered 2022-Feb-08 at 23:35In [13]: ortho_disc
Out[13]:
array([[1, 1, 1, 0, 0, 0, 0, 0, 0],
[1, 0, 1, 1, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 2, 2, 0]])
In [14]: polymer = 2
In [15]: (ortho_disc != polymer).all(axis=1).nonzero()[0]
Out[15]: array([0, 1])
QUESTION
here is the data and code that I'm using to plot the bar chart as shown in the output plot. The issue is with y-ticks, I need to have y-ticks aligned in a vertical manner such that they cover/coincides with all four bars. If we use rot = 'some int value' the ticks rotate, but they do not exactly align vertically covering four bars.
Polymer Depth Residual time HPAM7030 50 1159 HPAM7030 100 1638 HPAM7030 200 2170 HPAM7030 500 2718 APAM7525 50 2040 APAM7525 100 3101 APAM7525 200 4176 APAM7525 500 5270 ...ANSWER
Answered 2022-Feb-01 at 11:44I find it easier to use the Axes object returned by the pandas plotting method and set the y tick label alignment to 'center'
:
QUESTION
I have some data of longitudes and latitudes. My third variable is the penetration of the electric Vehicle in an municipality. Hence, I have sparse datas and I do not know the mapping from f(long,lat) -> MS_Year. I have the following datas
...ANSWER
Answered 2022-Jan-23 at 12:45I think you don't want a polynomial for the whole surface: that's likely to be very unstable, with huge amounts of variation between the points.
However, you might want a low degree local polynomial fit, or some low degree interpolation.
You haven't posted your real data, so I'll demonstrate with fake data. First, we do interpolation between the points:
QUESTION
I have a 3D simple cubic lattice, which I call Grid
in my code, with periodic boundary conditions of size 20x20x20 (number are arbitrary). What I want to do is plant multiple polymer chains with a degree of polymerization N (graphs with N nodes) that do no overlap, are self-avoiding.
At the moment, I can plant one polymer recursively. This is my code
...ANSWER
Answered 2022-Jan-16 at 04:24Self-avoiding walks has been studied at least since the 1960s and there's a vast literature on them. Fortunately, the problem you face belong to the simplest ones (walks' length is fixed at a relatively small value).
1The first thing you should be aware of is that your question is too broad to have a unique answer. That is, if you plant many polymers in the system, the result you're going to get depends on the dynamics of the polymer planting and growing. There are two major cases. Either you plant a number of seeds and start growing polymers from them, or you grow each polymer "elsewhere" and then try to plant them in the system at a random location, one by one, keeping the condition of self-avoidance. The two methods will result in statistically different distributions of polymers, and there's nothing you can do about it, except to specify the system dynamics in more detail.
I believe the second approach is a bit easier, as it saves you from deciding what to do if some polymers cannot grow to the desired length (restart the simulation?), so let's focus just on it.
The general algorithm might look like this:
- Set
maximum_number_of_attempts
to reasonably large, but not too large a value, say a million - Set
required_number_of_polymers
to the required value - Set
number_of_attempts
to 0 - Set
number_of_planted_polymers
to 0 - While
number_of_attempts
<maximum_number_of_attempts
ANDnumber_of_planted_polymers
<required_number_of_polymers
- increase
number_of_attempts
by 1 - generate the next random polymer
- chose a random position (lattice site) in the system
- check if the polymer can be planted at this position without intersections
- if and only if yes,
- accept the polymer (add it to the list of polymers; update the list of occupied lattice nodes)
- increase
number_of_planted_polymers
by 1
- increase
To speed thing up, you can be choosing the initial positions only from unoccupied sites (e.g. in a while
loop). Another idea is to try and use a polymer, on its first plating failure, several times (but not too many, you'd need to experiment) at different positions.
Now the next step: how to generate a self-avoiding random walk. Your code is almost OK, except for a few misconceptions.
In function void Grid::plant_polymer
there's one grave error: it always performs the search in the space of possible polymer shapes in exactly the same order. In other words, it is deterministic. For Monte Carlo methods it sounds like a disaster. One thing you might do to handle it is to randomly shuffle the directions.
QUESTION
I am running a Monte Carlo simulation of a polymer. The entire configuration of the current state of the system is given by the object called Grid
. This is my definition of Grid
:
ANSWER
Answered 2022-Jan-14 at 02:09One thing that you can certainly do to improve performance is to force moving _G
rather than coping it to G
:
QUESTION
I am working on a POC for Vaadin 8 to Vaadin 14 LTS migration for our project. After the application has migrated to 14, frontend directory under project directory is not found. Also I am not able to create a Vaadin Flow designer file because I get error as No Polymer is found in the project.
Should we create it manually under the project directory, or will it be created automatically after the maven build?
...ANSWER
Answered 2022-Jan-13 at 19:38Should we create it manually under the project directory
Yes. Maven plugin does not generate it automatically as the folder is normally in our archetypes and project starter templates.
QUESTION
I am try to automation a screen that has multiple shadow elements. For example, I have to set data for a text field called 'Student Name'. This field has to traverse through multiple shadow elements.
...ANSWER
Answered 2022-Jan-13 at 16:08Go to cypress.json
and write. This makes sure that all your get and find queries automatically go through shadow dom's without explicitly mentioning it.
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