arc | React starter kit based on Atomic Design | Frontend Framework library
kandi X-RAY | arc Summary
kandi X-RAY | arc Summary
ARc (Atomic React) is a React starter kit based on the Atomic Design methodology. It's progressive, which means that you can start with the basic boilerplate and try the other features when you are comfortable. If you find this useful, please check out Reakit, a toolkit for building composable UI with React.
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QUESTION
I was following along with this tutorial on creating a concurrent counter struct for a usize
value: ConcurrentCounter
. As I understand it, this wrapper struct allows us to mutate our usize
value, with more concise syntax, for example:my_counter.increment(1)
vs. my_counter.lock().unwrap().increment(1)
.
Now in this tutorial our value is of type usize
, but what if we wanted to use a f32
, i32
, or u32
value instead?
I thought that I could do this with generic type arguments:
...ANSWER
Answered 2021-Jun-15 at 23:55I haven't come across such a ConcurrentCounter
library, but crates.io is huge, maybe you find something. However, if you are mostly concerned with primitives such as i32
, there is a better alternative call: Atomics, definitely worth checking out.
Nevertheless, your approach of generalizing the ConcurrentCounter
is going in a good direction. In the context of operation overloading, std::ops
is worth a look. Specifically, you need Add
, Sub
, and Mul
, respectively. Also, you need a Copy
bound (alternatively, a Clone
would also do). So you were pretty close:
QUESTION
In tkinter I have made a notepad and also added a scrollbar to this notepad. The problem is when I click on the scrollbar (not using any arrow keys nor mouse scroll wheel)
I have tried google but I'm not the best at finding the right websites.
Heres the code to the notepad
...ANSWER
Answered 2021-Jun-15 at 17:13In your code, you aren't using the Listbox
. So, I suggest to remove that part completely and do this.
QUESTION
I am modeling a Time-constrained CVRP. The problem is to minimize the total travel time (not including the package dropping time) subject to vehicle (delivery) capacity and total time spent (per vehicle) constraints. The package dropping time refers to an additional time to be spent at each node, and the total time spent equals to the travel time plus this additional time. I have the below model that works for a single vehicle-type case. I would like to introduce two-vehicle type concept in there, meaning that I have a set of V1
type vehicles and another set of V2
type vehicles. The only difference of the vehicle-types is the per time cost of travel. Let x
denote the per time unit cost of travel by V1
, and y
denote the per time unit travel cost of V2
. How can I design the model so that it incorporates this additional aspect?
ANSWER
Answered 2021-Jun-13 at 13:34Simply register two transits callbacks (i.e. one per vehicle type)
Then use the overload of AddDimension() to pass an array of registered transit callback index.
QUESTION
I know this is a Rust newbie problem, but I actually can't wrap my head around it. I need to pass around a PhysicalDevice
from the Vulkano library. The problem is, PhysicalDevice
holds a reference:
ANSWER
Answered 2021-Jun-14 at 20:54So the reason for the error message is that instance
is a local variable in your instantiate
function. Because you aren't moving its ownership to the return value, it will be dropped at the end of the function.
But then if it gets dropped, any reference to it would be invalid. That's why Rust doesn't let you return something holding a reference to the local variable.
First, your struct is redundant, because PhysicalDevice
already holds a reference for the instance. Even without the local variable problem, I think you'd run into an ownership problem.
Second, let's say you rewrite and get rid of your InstanceInfo
struct and instead you want to just return a PhysicalDevice<'static>
. Well if that's what you promise to the compiler, then you have to make sure that the instance
you create will live for as long as the program lives.
You can do that either by having instance
be a static variable of your module, or by creating it at the very beginning of the program and then simply pass a reference ot it around.
For example
QUESTION
I know this question has been asked many times, but I still can't figure out what to do (more below).
I'm trying to spawn a new thread using std::thread::spawn
and then run an async loop inside of it.
The async function I want to run:
...ANSWER
Answered 2021-Jun-14 at 17:28#[tokio::main]
converts your function into the following:
QUESTION
I know there are a few answer for this, but it seems this one is a bit different. I need to change doughnut chart, rounded the first one and the last but one too. So in my example the black (first dataset) only would be rounded on the beginning (one side) and the gray (last but one) would be rounded at the end, like on the picture.
Of course, this is the latest version (v3) of Chart.js.
I used some code from here: Chart.js Doughnut with rounded edges and text centered
Maybe it's better with a custom chart, but I couldn't even get this far with that.
This is my code so far. Only makes rounded the first dataset and unfortunately both sided of it.
...ANSWER
Answered 2021-Jun-14 at 16:44I have modified your code and made changes for roundedCornersFor
. It will now take an object structure which will define take start
and end
as keys and the values will be the arc positions which are according to labels.
QUESTION
I have a couple of arcs dataframes with a very similar structure to these:
Ah: i j 0 1 1 1 1 2 2 2 1 3 2 2 K: Ok Dk 0 3 4 1 1 2 2 2 1I need to find a way to create a new dataframe that merges both, following this structure:
Route: Ok i j Dk 0 3 1 1 4 1 3 1 2 4 2 3 2 1 4 3 3 2 2 4 4 1 1 1 2 5 1 1 2 2 6 1 2 1 2 7 1 2 2 2 8 2 1 1 1 9 2 1 2 1 10 2 2 1 1 11 2 2 2 1or this structure:
Route: i j k 0 1 1 0 1 1 2 0 2 2 1 0 3 2 2 0 4 1 1 1 5 1 2 1 6 2 1 1 7 2 2 1 8 1 1 2 9 1 2 2 10 2 1 2 11 2 2 2Currently I have a piece of code that can do something similar to that but instead of a pandas dataframe (which is what I want to use) I'm using dictionaries (the reason behind that is that each "route" has different caracteristics that makes them unique from each other so a dictionary is useful and at the time I was just learning Python) but the issue is that it takes too much time and uses a lot of memory so I'm trying to find a way to make it a little bit quicker, avoiding 'for' loops and trying to apply Pandas to create the merged dataframe.
This is an extract of the structure of my current piece of code, for this example, consider the 'A' dataframe as the one that holds every combination possible of arcs so the 'if' condition makes sure that a connection exists before creating the route.
...ANSWER
Answered 2021-Jun-14 at 14:22I think you can use pandas Concat function to merge your dictionaries the way you want to. https://pandas.pydata.org/pandas-docs/stable/user_guide/merging.html
It's kind of hard to see how you want it to be laid out, but I think you want to use .merge
QUESTION
I'm struggling with the following issue. I visualized a big social network and would like to customize the color palette of the edges captured in geom_segment
for better visibility. For instance, I want to replace my blue scale by a red scale. How can I achieve that in the easiest way possible?
I have the following code which is working fine:
...ANSWER
Answered 2021-Jun-14 at 07:36Thanks to stefan, I used the following code which changed the color from blue to red using scale_color_gradient
.
QUESTION
I am new to zimpl and I am currently trying to modell the GTSP. The setting is that we have nodes which are grouped into clusters. My problem is i dont know how to implement in zimpl which node belongs to which cluster.
What I did so far:
set V:= {1..6};
set A:= { in V*V with i < j};
set C:= {1,2,3};
set W:= { in C*C with p < q};
set P[]:= powerset(C);
set K:= indexset(P);
I am guessing something is missing because i want to group node 1,2
in cluster 1
, 3,4
in cluster 2
and 5,6
in cluster 3
.
Some background Information:
Let G = (V, A)
be a graph where V=1,2,...,n
is the set of nodes and A = {(i, j): i, j ∈ V, i ≠ j}
is the set of directed arcs (or edges), and let c_ij
be the travel distance (or cost or time) from node i to node j. Let V1, V2, ... , Vk
be disjoint subsets of V such that union of these subsets equals to V. These subsets are called clusters. The GTSP is to find the tour that (i) starts from a node and visits exactly one node from each
cluster and turns back to the starting node (ii) never
visit a node more than once and (iii) has the minimum total tour length.
Associated with each arc, let x_ij
be a binary variable equal to “1” if the traveler goes from node i to node j, and “0” otherwise.
Thats the mathematicl model I want to model:
min∑i∈V ∑j∈V\{i} cijxij
subject to:
∑i∈Vp ∑j∈V\Vp xij = 1 (p= 1, ..., k)
∑i∈V\Vp ∑j∈Vp xij = 1 (p= 1, ..., k)
∑j∈V\{i} xji − ∑j∈V\{i} xij = 0 (∀i∈V)
xij∈{0,1} ∀(i, j)A
up−uq+k ∑i∈Vp ∑j∈Vq xij+(k−2)∑i∈Vq ∑j∈Vp xij ≤ k−1 (p≠q;p,q=2,...,k)
up≥0 (p=2, ..., k)
(Thats the link for the paper: http://www.wseas.us/e-library/conferences/2012/Vouliagmeni/MMAS/MMAS-09.pdf)
Maybe someone can help! thanks
...ANSWER
Answered 2021-Jun-12 at 15:36You can use an indexed set (just as u did to implement the powerset of C
) and assign the sets as needed. Try this for example:
QUESTION
ANSWER
Answered 2021-Jun-13 at 18:47In order to understand what's going on, I'll reformat the code a bit in order to make it more clear and explicit:
Your original code:
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