sp | Shortest Path | Learning library

Here is how it works:

Let me 1. explain the reason behind this observation, and 2. how to fix it.

One needs to be careful about how the data is oriented when computing the divergence (or the gradient in general), since it is important to compute the gradient along the correct axis to obtain a physically valid result.

np.meshgrid can output the mesh in two ways, depending on how you set the index parameter

While editing my initial question to add more context as Jay proposed I think it found the issue.

What probably happens? The view where the crash is, contains a table view. Each cell will be configured before being presented. I use a flag which holds the information, if the amount of weight for this cell (it is a strength workout app) has been initially set or is a change. When prepareForReuse is being called, this flag has not been reset. And that now means scrolling through the table view triggers a DB write for each reused cell, that leads to unnecessary writes to the db. Unnecessary, because the exact same number is already saved in the db.

My speculation: Scrolling fast could maybe lead to a race condition (I have read something about that issue with realm) and that maybe causes this weird crash, because there are multiple single writes initiated in a short time.

Solution: I now reset the flag on prepareForReuse to its initial value to prevent this misbehaviour.

The crash only happens when the cell is set up and the described behaviour happens. Therefor I'm quite confident I fixed the issue finally. Let's see. -- I was not able to reproduce the issue, but it also only happens pretty rare.

The issue is that in your static plot, you have actually created a list of Line2D objects (try printing line1 and you will see its not a single instance).

But, in the animation function, you just create a single Line2D instance to set the xdata and ydata for.

We can change to creating a list of Line2D instances, then loop over them and set the appropriate x and y data for each segment like so:

What can I do to ensure that it's only called once?

Nothing, that's how it's meant to work. In the View system you would not ask "Why is my view invalidated 3 times?". The framework invalidates (recomposes) the view as it needs, you should not need to know or care when that happens.

The issue with your code is that your Composable is reading the old value from preferences, that is not how it should work, that value should be provided by the viewmodel as part of the state. Instead of providing just the new price, expose a Data Class that has both the new and old price and then use those 2 values in your composable to determine what color to show, or expose the price and the color to use.

Your first query should be fine just adjusted to match the format that Django expects.

First, replace ? with %s to pass parameters to the query

Second, replace % with %% as a single percent is an "escape" character and you need to escape the escape char

DOCS

Here's your original query truncated to show an example of how it could work

You need to add scala-compiler configuration to your pom.xml. The problem is without that there is nothing to compile your SparkTrans.scala file into java classes.

Add:

I suggest first create MultiIndex in columns by header=[0,1] by convert first 2 headers rows: