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I have a situation where my code needs to make one network call to fetch a bunch of items, but while waiting for those to come down, another network call might fetch an update to those items. I'd love to be able to enqueue those secondary results until the first one has finished. Is there a way to accomplish that with Combine?

Importantly, I am not able to wait before making the second request. It’s actually a connection to a websocket that gets made at the same time as the first request, and the updates come over the websocket outside of my control.

Update

After examining Matt’s thorough book on Combine, I settled on .prepend(). But as Matt warned me in the comments, .prepend() doesn’t even subscribe to the other publisher until after the first one completes. This means I miss any signals sent prior to that. What I need is a Subject that enqueues values, but perhaps that’s not so hard to make. Anyway, this is where I got:

Initially I was going to use .append(), but I realized with .prepend() I could avoid keeping a reference to one of the publishers. So here’s a simplified version of what I’ve got. There might be syntax errors in this, as I’ve whittled it down from my (employer’s) code.

There’s the ItemFeed, which handles fetching a list of items and simultaneously handling item update events. The latter can arrive before the initial list of items, and thus must be sequenced via Combine to arrive after it. I attempt to do this by prepending the initial items source to the update PassthroughSubject.

Below that is an XCTestCase that simulates a lengthy initial item load, and adds an update before that load can complete. It attempts to subscribe to changes to the list of items, and tries to test that the first update is the initial 63 items, and the subsequent update is for 64 items (in this case, “update” results in adding an item).

Unfortunately, while the initial list is published, the update never arrives. I also tried removing the .output(at:) operators, but the two sinks are only called once.

After the test case sets up the delayed “fetch,” and subscribes to changes in feed.items, it calls feed.handleItemUpatedEvent. This calls ItemFeed.updateItems.send(_:), but unfortunately that is lost to oblivion.

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I have two arrays, arr1 is an array of objects and arr2 is just a regular array. I am trying to match arr2 values with the "original" value from the objects of arr1 and return the "new" value into a new resulting array. There's usually more than 2 items in arr2 and the order isn't the always same that's why I couldn't just match by the index each time.

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Question

In my funnel plot, I want to change textinfo annotation to my client's language(Chinese).To be more specific, I want to change "initial" to "总体", and "previous" to "上层". Also, I want to change the format of inside values too, e.g. "3000" to "3千". Is there any method to do it? Thanks a lot!

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I am displaying a table and want to show some notes above some table labels. Tried to maximize z-index of hovered element, but did not work. Stil the tooltip is showing below the th elements.

Is there a way to show the tooltip above all other layers?

I put smaller version of table into a code snippet. Problematic part is already at the beginning in the second cell, with number 2021. I made the tooltip really long to show that it is actually displaying but for some reason it is behind the background.

Thank you in advance for any help.

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I have data that looks like this:

Date Vendor Revenue 2021-01-01 Mickey Mouse 100 2021-01-15 Mickey Mouse 150 2021-01-01 Donald Duck 100 2021-01-01 Goofy 100 2021-02-01 Mickey Mouse 200 2021-02-01 Donald Duck 200 2021-02-01 Goofy 200

And have some more data like this:

Month Vendor Snack Percentage January 2021 Mickey Mouse Churros 0.5 January 2021 Mickey Mouse Funnel Cake 0.25 January 2021 Mickey Mouse Apples 0.25 January 2021 Goofy Churros 0.34 January 2021 Goofy Funnel Cake 0.33 January 2021 Goofy Water 0.33

I would like to perform an operation using Pandas that yields the following:

Date Vendor Snack Revenue 2021-01-01 Mickey Mouse Churros 50 2021-01-01 Mickey Mouse Funnel Cake 25 2021-01-01 Mickey Mouse Apples 25 2021-01-15 Mickey Mouse Churros 75 2021-01-15 Mickey Mouse Funnel Cake 37.5 2021-01-15 Mickey Mouse Apples 37.5 2021-01-01 Goofy Churros 34 2021-01-01 Goofy Funnel Cake 33 2021-01-01 Goofy Water 33 2021-01-01 Donald Duck 100 2021-02-01 Donald Duck 200 2021-02-01 Mickey Mouse 200 2021-02-01 Goofy 200

I know how to do this using cross joins in Redshift but can't quite nail down the syntax here using either pd.merge or np.dot. Here are the sample data frames:

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I am implementing Bloom Filter in a maven project using

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I have a table that has user_seq_id and no of days a user was active in the program. I want to understand the drop-off funnel. Like how many users were active on day 0 (100%) and on day 1, 2 and so on.

Input table :

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I'm trying to make a simple Python Kivy app (using a kv file for the layout) that I will use to keep inventory of my parts for work. I am very new to python and kivy, so I need a little bit of direction on this.

One of the basic functions will be to allow the user to input a new part on the "Add Part to Inventory" screen (one of four screens). The user input consists of four items (part name, serial number, on-hand quantity, and the minimum amount needed).

Once the user enters this info and presses the 'Submit' button, I would like that data to be appended to a new row in a google sheet that I'm using as a backend database using the Google Drive/Sheets API (which I was able to get working).

Most of the example apps that I've found online only have one screen, and are only dealing with one type of user input (usually text, whereas my input will be text and integers).

I'm confused as to where I need to put my ids in the kv file (I'm assuming under the AddPartWindow layout), how to call a function when a button is pressed that is not in the root class, how to store the user input into a list since I'm not sure what the ObjectProperty function is really doing, and finally, how to append that list to a new row in my google sheet.

I'm not looking for a cut and paste answer, just some direction would be nice as I have not been able to find a good reference for exactly what I'm trying to do. My main confusion lies in having multiple screens, and how to transfer data between the different screens and their respective classes. Should data only be funneled through a single root class? Or can each class be used to handle data coming from their respective screens (windows) in the app? What exactly is the ObjectProperty function doing? I find the kivy website to be a bit convoluted when describing the properties class.

Any help/direction woud be greatly appreciated.

Here is the main.py code:

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I am trying to create a contour-enhanced funnel plot in R for a meta-analysis. A contour-enhanced funnel plot also shows the areas of the plot corresponding to different p-values (see Peters et al, 2008, Contour-enhanced meta-analysis funnel plots help distinguish publication bias from other causes of asymmetry).

I found this very useful guide to meta-analytic procedure online (https://bookdown.org/MathiasHarrer/Doing_Meta_Analysis_in_R/smallstudyeffects.html) suggesting the following code to create such a plot:

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