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Identifying and removing null characters in UNIX
I have a text file containing unwanted null characters (ASCII NUL, \0 ). When I try to view it in vi I see ^@ symbols, interleaved in normal text. How can I:
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Check if one list contains element from the other
...h(
list2.stream()
.map(Object2::getProperty)
.collect(toSet())
::contains)
...which collects the distinct values in list2 and tests each value in list1 for presence.
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Python concatenate text files
I have a list of 20 file names, like ['file1.txt', 'file2.txt', ...] . I want to write a Python script to concatenate these files into a new file. I could open each file by f = open(...) , read line by line by calling f.readline() , and write each line into that new file. It doesn't seem very "el...
Chmod 777 to a folder and all contents [duplicate]
...or others.
If your production web folder has multiple users, then you can set permissions and user groups accordingly.
More info :
Understanding File Permissions: What Does “Chmod 777″ Mean?
What file permissions should I set on web root?
Why shouldn't /var/www have chmod 777
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How to get a password from a shell script without echoing
...ad secret string
read_secret()
{
# Disable echo.
stty -echo
# Set up trap to ensure echo is enabled before exiting if the script
# is terminated while echo is disabled.
trap 'stty echo' EXIT
# Read secret.
read "$@"
# Enable echo.
stty echo
trap - EXIT
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Regex for string not ending with given suffix
...robably use the PCRE module on NPM or similar to use them directly (it's a set of bindings so I don't think you can use it front-end)
– Eirik Birkeland
Mar 18 '16 at 13:16
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How to solve privileges issues when restore PostgreSQL Database
...dividual roles instead: https://www.postgresql.org/docs/current/static/sql-set-role.html and https://www.postgresql.org/docs/current/static/sql-alterrole.html.
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Replacing NAs with latest non-NA value
...hmarked my improved function and all the other entries here. For the basic set of features, tidyr::fill is fastest while also not failing the edge cases. The Rcpp entry by @BrandonBertelsen is faster still, but it's inflexible regarding the input's type (he tested edge cases incorrectly due to a mis...
What can you use Python generator functions for?
...til the next item is requested.
Generators are good for calculating large sets of results (in particular calculations involving loops themselves) where you don't know if you are going to need all results, or where you don't want to allocate the memory for all results at the same time. Or for situat...
DateTime format to SQL format using C#
...ssing it as a string to SQL-Server can lead to errors as it depends on the settings how the date is interpreted on the server side. In europe, we write '1.12.2012' to indicate december 1st 2012, whereas in other countries this might be treated as january 12th.
When issuing statements directly in SS...