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Mastering Development

How can I use ckeditor5 in Angular Material

I am trying to implement WYSIWYG editor in my angular application v10. The editor is this. Now when I am implementing it on plane component(without angular material) it works fine. The problem starts when I want it to implement it using Angular Material under mat-form-field. Here is my code <form class="example-form"> <mat-form-field class="example-full-width" appearance="outline"> <mat-label>Request […]

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User Help

Cannot repair BTRFS partition because there is too little space left

I cannot mount a BTRFS partition because its metadata store is too full. The machine started complaining that the disk is full (it was the metadata) and while trying to fix the situation by running balance in various forms (it wouldn’t complete, because there was not enough space on the device, or it would get […]

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Linux Mastering Development Ubuntu

Iptables masqurading fails on outbound interface

I’m trying to set up an Ubuntu 18.04 box as a router behind my ISP router, with a local subnet behind the box. I have a home subnet provided through the ISP router with addresses in the 192.168.1.0/24 range, on interface enpo1 of the box. The address of the box’s interface on the 192.168.1.0/24 subnet […]

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Linux Mastering Development Ubuntu

Iptables masqurading fails on outbound interface

I’m trying to set up an Ubuntu 18.04 box as a router behind my ISP router, with a local subnet behind the box. I have a home subnet provided through the ISP router with addresses in the 192.168.1.0/24 range, on interface enpo1 of the box. The address of the box’s interface on the 192.168.1.0/24 subnet […]

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Mastering Development

Combine multiple arrays to a new dataframe

Here I have 2 arrays, First array (arr1) : array([[ 4.],[ 4.],[ 2.],[ 3.]]) Second array (arr2) : array([[ 7.],[ 7.],[ 8.],[ 8.]]) I want to make a new dataframe from the two arrays, so it looks like this : arr1 arr2 4 7 4 7 2 8 3 8 I already made code like […]

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Linux Mastering Development

How can I get line numbers to appear automatically each time I call vim? [duplicate]

How can I get line numbers to appear automatically each time I call vim? I know “:set number” works interactively and I tried to put it in .bashrc, but it didn’t work.

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Linux Mastering Development Ubuntu

NetSpeed Indicator In Focal Fossa

Does Netspeed working in Focal Fossa and if it does, does anyone help installing it? I try from some repository: sudo add-apt-repository ppa:nilarimogard/webupd8 ,but it didnt work,I get this: dpkg: error: cannot access archive ‘indicator-netspeed’: No such file or directory after adding repository I type : sudo add-apt-repository universe after that normally type Sudo apt-update […]

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Linux Mastering Development

How can I get line numbers to appear automatically each time I call vim?

How can I get line numbers to appear automatically each time I call vim? I know “:set number” works interactively and I tried to put it in .bashrc, but it didn’t work.

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Mastering Development

VSCode disable highlight matching

How can I replace this annoying white rectangle with anything nicer? I tried to disable it in user settings using “editor.matchBrackets”: “never”, but it didn’t work.

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Ask Mathematics

Vector space, direct sums involving linear maps and polynomials

Let be $V$ a vector space over $K$ and lets $a\in K\setminus\{0\}$ and $T:V \to V$ a linear map s. t. $a^2T-3aT^2+T^3=0$. Show that $V = Ker(T) \oplus Im(T)$. My professor told me an observation: This result is more general, that is, if I have a polynomial $P$ such with $P(0) = 0$ and $P'(0) […]