How to symbolically manipulate the closed form series output from the easyFourier package?

EasyFourier by @xzczd is a nice package to obtain a Fourier series in closed form, e.g.

f = x^2 easyFourierTrigSeries[f, {x, -\[Pi], \[Pi]}, \[Infinity]] 

enter image description here

However, the output cannot be manipulated symbolically, at least I don’t know how to. For instance, differentiating the Fourier series is not possible like this:

D[easyFourierTrigSeries[f, {x, -\[Pi], \[Pi]}, \[Infinity]],x] 

enter image description here

What I would like to do is something comparable to the following, where I have copied the summand manually into a regular Mathematica Sum:

enter image description here

BTW: How do I downscale the size of pictures in stack exchange? Is there no easier way to insert Mathematica output? How can I insert complicated Mathematica input code in 2d-mode? (Thanks for hints to these "meta" questions, too.)

Incorrect precedence when saving notebook as Wolfram language package

I want to save a notebook as a Wolfram language package. When I use the menu command File>Save As and choose ".wl" then the resulting package contains precedence issues which were not there in the original notebook file. For example, a code which is correctly interpreted as (a^2).b in the notebook becomes (a^2.)*b in the package.

Example: A notebook which calculates (a^2).b

nb=CreateDocument[]; NotebookWrite[nb,Cell[BoxData[RowBox[{SuperscriptBox["a","2"],".","b"}]],"Code"]] 

Use File>Save As and choose Wolfram language package. Resulting package looks as follows:

(* ::Package:: *)  a^2.b 

This package evaluates (a^2.)*b instead of (a^2).b.

Is there a possibility to save a notebook as a Wolfram language package preserving correct precedence?

Database maximum size when import bacpac file using sql package

Can be specify Database maximum size when import bacpac file using sql package? Maximum size 32GB is auto sizing but my actual DB size is over 35GB. originally: DatabaseMaximumSize=(INT32).

eg. import parameter /p:DatabaseEdition=GeneralPurpose /p:DatabaseServiceObjective=GP_Gen5_2 /p:DatabaseMaximumSize=(INT60)

How do I get to the Terrain Tools and Advance option in Package Manager in Unity?

I am not able to find the Terrain Tools option in Package Manager when I search it. I am new to Unity and that’s why I was following a tutorial. The video was about building a terrain and there he told to get the terrain tools first.

For the terrain tools we need to go: Window > Package Manager > Packages > All Packages and then search it

But in the Packages I don’t have the All packages option and also I don’t have the Advance option as told in the video. I am sure that the Unity editor in the video is of an old version. Currently I am using 2020.3.8 version of Unity.

If there are some major changes between that version(used in the video) and my version(2020.3.8) then where do I find the Terrain Tools and the Advance option?

Screenshot From My Computer – Screenshot From My Computer

[NOTE: If there are any confusions, please refer the video]

Composer Installed Package with WordPress Rest API Endpoint

I am trying to use the Square SDK with a WordPress website. I installed Composer and the Square SDK. I created a WP_Rest_API, but when trying to use the Square classes inside of the .php file, I get an error.

  1. I created a new plugin in my wordpress plugins folder.
  2. In the .php file inside my plugin, I require the "autoload.php" file of Composer from my root directory.
  3. When trying to use the classes from the Square SDK I get an error.


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Kali Linux package installation error

I installed anonsurf on Kali Linux in VMware and now i can’t use apt-get install and i can’t uninstall it or stop it i don’t know why i can’t even remove any package.
this is the error when trying to install beef-xss for example:

You might want to run ‘apt –fix-broken install’ to correct these.
The following packages have unmet dependencies:
beef : Depends: libcattle-1.0-0 (>= 1.2.0) but it is not going to be installed
kali-anonsurf : Depends: i2p but it is not going to be installed
Recommends: gtkdialog but it is not installable
Recommends: gufw but it is not going to be installed
E: Unmet dependencies. Try ‘apt –fix-broken install’ with no packages (or specify a solution).

i tried the following:
apt-get remove anonsurf (unable to locate package)

rm -rf anonsurf (it worked and i the directory is deleted but anonsurf still works)

anonsurf stop

anonsurf stopi2p

  • stopping I2P services
    sudo: unknown user: i2psvc
    sudo: unable to initialize policy plugin

how to fix it
Thanks in Advance.

Kafka source code on github and from the apache website is missing the “org.apache.kafka.common.message.” package? [closed]

I tried downloading the source code of Kafka from Github as well as from Apache’s website. I found that both the sources were missing the “org.apache.kafka.common.message.” package. Can anybody kindly let me know why this might be the case.

Kindly note that I had downloaded the source of “AK RELEASE 2.5.0” from Apache’s website. Similarly I used “trunk” branch from the current github repository for kafka.