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QUESTION
I have a class Foo
which contains one of math comparison operations op
as a string: '<', '>' or '='. Also Foo
contains a number val
.
ANSWER
Answered 2021-Jun-06 at 17:50This will work with eval
. But caution must be used with eval
! See this post for a safer way by first parsing with ast.literal_eval
.
test a boolean expression in a Python string
The safer approach might not count any longer as "simpler" or "more elegant".
QUESTION
I'm trying to update the text nodes of my D3 tree every time I press a HTML button, adding one every time, but I don't know how to do it properly without having to create the tree again. Can anyone help me with it?
The following snippet exemplarizes the state that I'm now
...ANSWER
Answered 2021-Apr-06 at 08:20It seems that I was not selecting correctly the text. I changed it to select the class that I chose for the text inside the nodes (.nodeText
) and it's currently working as expected. In the following snippet you can see the changes
QUESTION
I have data that's comprised of several "chunks" of columns. In each chunk, the columns names are the same but distinguished by a prefix: A_color
, B_color
, C_color
, XX_height
, YY_height
, ZZ_height
, etc. Sometimes, there might be just the stem name without any prefix. Also, in each chunk there's only one column with data and the others are NA
:
ANSWER
Answered 2021-Mar-06 at 08:48You can try the contains
function inside coalesce
therefore you don't need to split the column names into before _ and after_. Instead you are just looking for columns that have for example the word "RmiNdhdGoy" inside their name.
In short you tell R to create a new column based on all columns already including a certain expression.
QUESTION
I follow this tutorial on commands in MVVM:
https://metanit.com/sharp/wpf/22.3.php
Here's an example code of a Command from the tutorial
...ANSWER
Answered 2021-Feb-16 at 20:55You might be missing the part in C# where any assignment returns the value that was assigned, as a result
QUESTION
Is it possible to upload an Android app on a Android play store for testing purposes only (before the actual release) so that :
The developers can test the publication process under real conditions.
The testers can download the app for free and test it before it is available to the public (possibly with a password).
The public at large does not see this test version of the app.
(Basically it’s like asking an editor for a proof exemplar, before the actual publication of a book)
This is not the same as « How to publish a beta version on Google Play ? », since a beta version is in theory accessible to all users an not to a limited (chosen, specific) list of testers.
...ANSWER
Answered 2021-Feb-09 at 12:47Yes, that is possible.
I assume you are talking about the Google Play Store specifically, since it's the biggest and most official app store for android.
Google Play Store offers various test tracks:
- Internal test: For up to 100 testers, invitation only
- Closed test: Same as internal, just for more users
- Open Test: Anyone can join
In all test tracks, users can only leave feedback instead of reviews and app ratings. You can create multiple different tests and versions at the same time and invite different users. For example if you want to test features only in certain regions.
Additionally, there is internal app sharing which allows you to quickly share app bundles or APKs via a link through Google Play Store. This is for example usefull for CI / CD where each build is uploaded to internal app sharing. This is also currently the only solution for this usecase which supports Android App Bundles. Other solutions like Microsoft Appcenter only allow APK uploads.
Imporant info before you uploadOnce you upload an APK or app bundle for the first time, certain parameters will be set and become unchangable in the specific play store entry:
- app package name
- app signing key
So once you upload an app in either of the test tracks, without even releasing it, you can not change the app's package name or upload it with a different signing key. A different package name will require a new play store entry.
The signing key can only be changed when the original key is still present (there is a roll-over process for that, but you need the original signing key for that!). So make sure you back up the signing key and don't use the default debug signing key for test uploads.
Further info:
QUESTION
So an exemplar format would be:
...ANSWER
Answered 2020-Dec-15 at 06:48Use f-Strings for this and it's pretty simple and easy too.
QUESTION
I want to compare the output of a scalar function with a scalar value in a CHECK statement when creating a table, but it doesn't seem to do the right comparisons. I want the check statement to be "checked" if the scalar function returns 1. Is there any way to do this? (The function is called in the last check statement)
The statement runs successfully, and if I run the function out of the CHECK function it returns the right values (0 or 1), but when I insert data that satisfies 1 in the function returned value, errors are returned. This is my code and what I've tried,
...ANSWER
Answered 2020-Dec-01 at 00:44Marx,
I see no error with the CHECK statement in your table. See the dbfiddle here; it is working as intended, because the value you are trying to INSERT violates the CHECK statement and will not work.
If you click the link and scroll down, you see that based on the data you provided, there is no way for the function to return 1 for some of these rows. Namely, here is one example that fails:
QUESTION
this is my table:
...ANSWER
Answered 2020-Nov-24 at 18:16I think the problem is this constraint:
QUESTION
I want to make a function that accepts a class exemplar/class name and returns a collection of a certain number of exemplars of said class, initalized and populated. So far I have come up with this solution:
...ANSWER
Answered 2020-Sep-17 at 11:34Ideally, you don't (to answer the question as titled) - that way your code doesn't silently break when a class gets renamed, for example.
There's a better way, one that gives you an immediate compile-time error as soon as something breaks, and that works nicely with static code analysis and refactoring tools, such as Rubberduck - full disclosure, that's my website, and I manage the Rubberduck open-source project.
You could formalize the task of creating an instance of a class by defining an abstract factory interface. Add a new class module, call it IObjectFactory
:
QUESTION
I am new to osm. Currently I am trying to retrieve multiple cities' building polygon using osmnx package in python.
Code:
...ANSWER
Answered 2020-Aug-28 at 20:45It looks like OSMnx's footprints
module is not correctly handling or disregarding a complex (and possibly invalid?) multipolygon geometry. Note that efforts are underway to replace the footprints
and pois
modules with a more powerful, robust, generalizable geometries
module. In the meantime, I believe you can accomplish your goal with the pois
module like this:
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