Problem with compiling the code by terminal in linux [closed] - linux

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I have a problem with compiling the code in the terminal. As in the photo, When I compile the code, it shows the same answer

The file elnur.c is not saved, because it has (*elnur.c), the '*' sign means that the file is not save.
Save the file and run again.

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What is "neg_mean_absolute_error" and where can I find it? [closed]

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I am new to machine learning. I am trying to learn feature selection from this link. Here they have a line of code which is given below
search = GridSearchCV(pipeline, grid, scoring='neg_mean_squared_error', n_jobs=-1, cv=cv)
But whenever I try to run this code I get the error
I cannot find where to import neg_mean_squared_error from. I am not sure where I should write the function myself or not. The tutorial isn't clear on this issue.
It is just a typo.
You need
neg_mean_absolute_error
You typed
neg_mean_absolure_error
using an r instead of t
Reference: https://scikit-learn.org/stable/modules/model_evaluation.html

Compile error: Sub or Function not defined - I want to add an Enter button to my form [closed]

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Compile error: Sub or Function not defined - I want to add an Enter button to my form
Change "STE" to "SET"
It happens to the best of us :-)

Bash terminal error when using 'unmask' command [closed]

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Any time i type the 'unmask' command in my bash terminal i get the error below:
'bash: unmask: command not found'
Please, any ideas on how i can solve this problem, I believe 'unmask' is a built in command.
I am using bash --version 5.0.16(1)
Could it be that you actually meant umask?

COUNTIF function with wild cards isn't working [closed]

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Have an excel sheet, I am trying to do a =COUNTIF(29:29, *TBB*). however these wild cards dont seem to be working. Any Ideas.
Try this
=COUNTIF(29:29,"*TBB*")

What happens if I type > / on linux [closed]

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When I type > file.extension I know that the file is replaced by a empty file.
What if then I type > / ? My / partition will be erased and I'll lost everything in it?
I'm curious and wondering if someone already tried this.
You cannot redirect to a directory

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