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How to port data-only volumes from one host to another?
...Docker documentation on Working with Volumes there is the concept of so-called data-only containers, which provide a volume that can be mounted into multiple other containers, no matter whether the data-only container is actually running or not.
...
Check folder size in Bash
...arent sizes, rather than disk usage; although the apparent size is usually smaller, it may be larger due to holes in ('sparse')
files, internal fragmentation, indirect blocks, and the like
And of course theres no need for -h (Human readable) option inside a script.
Instead You can use ...
MongoDB Many-to-Many Association
... user document:
{name:"Joe"
,roles:["Admin","User","Engineer"]
}
To get all the Engineers, use:
db.things.find( { roles : "Engineer" } );
If you want to maintain the roles in separate documents then you can include the document's _id in the roles array instead of the name:
{name:"Joe"
,roles:...
How can I rename a project folder from within Visual Studio?
...s (answer "no" if asked to load a project from source control).
Go through all the unavailable projects and...
Open the properties window for the project (highlight the project and press Alt+Enter or F4, or right-click > properties).
Set the property 'File Path' to the new location.
If the pr...
“tag already exists in the remote" error after recreating the git tag
...ag—could retain its old tag. So while this tells you how to do it, be really sure you want to do it. You'll need to get everyone who already has the "wrong" tag to delete their "wrong tag" and replace it with the new "right tag".
Testing in Git 2.10/2.11 shows that retaining the old tag is the ...
'id' is a bad variable name in Python
... keyword or built-in function in any language is a bad idea, even if it is allowed.
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Difference between a virtual function and a pure virtual function [duplicate]
... class. Derived classes can override virtual functions. Virtual functions called through base class pointers/references will be resolved at run-time. That is, the dynamic type of the object is used instead of its static type:
Derived d;
Base& rb = d;
// if Base::f() is virtual and Derived o...
Import SQL dump into PostgreSQL database
...re you're already connected to the correct database. This command executes all of the SQL commands in the specified file.
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Find out a Git branch creator
...t/refs/heads/<branch> in your repository.
That written, if you're really into tracking this information in your repository, check out branch descriptions. They allow you to attach arbitrary metadata to branches, locally at least.
Also DarVar's answer below is a very clever way to get at this...
How can I create a link to a local file on a locally-run web page?
...a>
These will never open the file in your local applications automatically. That's for security reasons which I'll cover in the last section. If it opens, it will only ever open in the browser. If your browser can display the file, it will, otherwise it will probably ask you if you want to down...