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How to debug an apache virtual host configuration?
...d (Ubuntu)
apache2ctl -t
# MacOS
apachectl -t
List virtual hosts
To list all virtual hosts, and their locations:
# Red Hat-based (Fedora, CentOS) and OSX
httpd -S
# Debian-based (Ubuntu)
apache2ctl -S
# MacOS
apachectl -S
...
In Docker, what's the difference between a container and an image? [duplicate]
... running (or stopped) instances of some image.
Start with the base image called 'ubuntu'. Let's run bash interactively within the ubuntu image and create a file. We'll use the -i and -t flags to give us an interactive bash shell.
$ docker run -i -t ubuntu /bin/bash
root@48cff2e9be75:/# ls
bin bo...
Using std Namespace
...efined vector.
I am always against using using namespace std;. It imports all sorts of names into the global namespace and can cause all sorts of non-obvious ambiguities.
Here are some common identifiers that are in the std namespace: count, sort, find, equal, reverse. Having a local variable call...
Removing whitespace between HTML elements when using line breaks
...0 in width, and the images won't be affected.
Don't know if this works in all browsers, but I tried it with Chromium and some <li> elements with display: inline-block;.
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How do I work with a git repository within another repository?
I have a Git media repository where I'm keeping all of my JavaScript and CSS master files and scripts that I'll use on various projects.
...
Difference: std::runtime_error vs std::exception()
... in the exception hierarchy. It has no other uses. In other words, conceptually it is an abstract class (even though it is not defined as abstract class in C++ meaning of the term).
std::runtime_error is a more specialized class, descending from std::exception, intended to be thrown in case of vari...
How to get a list of user accounts using the command line in MySQL?
...RE user='someuser' and host='somehost'; If you do DELETE FROM mysql.user;, all users are gone. Logins after the next mysql restart or FLUSH PRIVILEGES; eliminate users from memory. Here is an example of one of my posts on doing DELETE FROM mysql.user responsibly : dba.stackexchange.com/questions/461...
Hibernate: hbm2ddl.auto=update in production?
...ite your own patches, review them with DBA, test them, then apply them manually.
Theoretically, if hbm2ddl update worked in development, it should work in production too. But in reality, it's not always the case.
Even if it worked OK, it may be sub-optimal. DBAs are paid that much for a reason.
...
Why does Math.Round(2.5) return 2 instead of 3?
...lows IEEE Standard 754,
section 4. This kind of rounding is
sometimes called rounding to nearest,
or banker's rounding. It minimizes
rounding errors that result from
consistently rounding a midpoint value
in a single direction.
You can specify how Math.Round should round mid-points usi...
What’s the difference between “Array()” and “[]” while declaring a JavaScript array?
...ceeds the size of the stack, and it has to be re-created. So there can actually, depending on the use case, be a performance increase when using new Array() because you can prevent the overflow from happening.
As pointed out in this answer, new Array(5) will not actually add five undefined items to...