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How to zero pad a sequence of integers in bash so that all have the same width?
...uce the following output:
00010
00011
00012
00013
00014
00015
More generally, bash has printf as a built-in so you can pad output with zeroes as follows:
$ i=99
$ printf "%05d\n" $i
00099
You can use the -v flag to store the output in another variable:
$ i=99
$ printf -v j "%05d" $i
$ echo $j...
Get first and last day of month using threeten, LocalDate
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Going with this one, uses the API resources specifically made to handle this particular problem.
– jpangamarca
Jul 11 '17 at 16:53
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How to fix “Headers already sent” error in PHP
...ders must be invoked before any output is made.
summary ⇊
Otherwise the call fails:
Warning: Cannot modify header information - headers already sent (output started at script:line)
Some functions modifying the HTTP header are:
header / header_remove
session_start / session_regenerate_id
se...
What's “this” in JavaScript onclick?
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Yea... you didn't really answer the question :-/ nothing personal!
– Dave
Oct 23 '12 at 10:48
1
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Ternary operator (?:) in Bash
... 20 -- this can also be a result of an expression.
This approach is technically called "Parameter Expansion".
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Remove columns from dataframe where ALL values are NA
I'm having trouble with a data frame and couldn't really resolve that issue myself:
The dataframe has arbitrary properties as columns and each row represents one data set .
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JavaScript: Upload file
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Pure JS
You can use fetch optionally with await-try-catch
let photo = document.getElementById("image-file").files[0];
let formData = new FormData();
formData.append("photo", photo);
fetch('/upload/image', {method: "POST", body: formData});
async fu...
How to check whether mod_rewrite is enable on server?
...nfiguration file, make sure the virtual host in question has the directive AllowOverride All somewhere like this:
<VirtualHost *:80>
...
<Directory "directory/of/your/.htaccess">
AllowOverride All
</Directory>
</VirtualHost>
Basically, this states to ...
Image Segmentation using Mean Shift explained
Could anyone please help me understand how Mean Shift segmentation actually works?
2 Answers
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psql - save results of command to a file
I'm using psql's \dt to list all tables in a database and I need to save the results.
10 Answers
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