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What is the difference between gsub and sub methods for Ruby Strings
...'ve been using :gsub and it appears that they are essentially the same. Can anyone explain the difference to me? Thanks!
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https connection using CURL from command line
I am new to Curl and Cacerts world and facing a problem while connecting to a server.
Basically, I need to test connectivity over https from one machine to another machine.
I have a URL to which I need to connect from Machine A (a linux machine)
I tried this on command prompt
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How to check if field is null or empty in MySQL?
...LL or field1 = '', 'empty', field1) as field1
from tablename
or
SELECT case when field1 IS NULL or field1 = ''
then 'empty'
else field1
end as field1
from tablename
If you only want to check for null and not for empty strings then you can also use ifnull() or co...
How to jump directly to a column number in Vim
... crash coordinates in the form of line number and column number. However I can't find a way to directly jump to the column number, even though I can jump to the line so easily.
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What is the difference between svg's x and dx attribute?
...n would be a proper time to use the axis shift attribute (dx) versus the location attribute (x)?
2 Answers
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Downloading Java JDK on Linux via wget is shown license page instead
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*Works as of 07-11-2020 for JDK 14
wget --no-check-certificate -c --header "Cookie: oraclelicense=accept-securebackup-cookie" https://download.oracle.com/otn-pub/java/jdk/14.0.1+7/664493ef4a6946b186ff29eb326336a2/jdk-14.0.1_linux-x64_bin.rpm -O ~/Downloads/jdk-14.0.1_linux-x64_bin.r...
Chmod recursively
... have an archive, which is archived by someone else, and I want to automatically, after I download it, to change a branch of the file system within the extracted files to gain read access. (I can't change how archive is created).
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R apply function with multiple parameters
... var2 = 1 and now I want to apply the function f() to the list L . Basically I want to get a new list L* with the outputs
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sql “LIKE” equivalent in django query
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Use __contains or __icontains (case-insensitive):
result = table.objects.filter(string__contains='pattern')
The SQL equivalent is
SELECT ... WHERE string LIKE '%pattern%';
share
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How to check the version before installing a package using apt-get?
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OK, I found it.
apt-cache policy <package name> will show the version details.
It also shows which version is currently installed and which versions are available to install.
For example, apt-cache policy hylafax+
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