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Copying files from Docker container to host
...m a container to the host, you can use the command
docker cp <containerId>:/file/path/within/container /host/path/target
Here's an example:
$ sudo docker cp goofy_roentgen:/out_read.jpg .
Here goofy_roentgen is the container name I got from the following command:
$ sudo docker ps
CONTA...
How to pass table value parameters to stored procedure from .net code
... to a stored proc as an nvarchar (separated by commas) and internally divide into single values. I add it to the SQL command parameters list like this:
...
How to get the instance id from within an ec2 instance?
How can I find out the instance id of an ec2 instance from within the ec2 instance?
32 Answers
...
ruby on rails f.select options with custom attributes
...e in your question. Using html5 data-attributes:
<%= f.select :country_id, options_for_select(
@countries.map{ |c| [c.name, c.id, {'data-currency_code'=>c.currency_code}] }) %>
Adding an initial selection:
<%= f.select :country_id, options_for_select(
@countries.map{ |c| [c.n...
Can I concatenate multiple MySQL rows into one field?
...
You can use GROUP_CONCAT:
SELECT person_id, GROUP_CONCAT(hobbies SEPARATOR ', ')
FROM peoples_hobbies
GROUP BY person_id;
As Ludwig stated in his comment, you can add the DISTINCT operator to avoid duplicates:
SELECT person_id, GROUP_CONCAT(DISTINCT hobbies SEPARA...
How to avoid using Select in Excel VBA
...en you have to select that sheet and cell. copy/paste is a bad example, at least in the case of values, it can be done faster by a code such as Sheets(2).[C10:D12].Value = Sheets(1).[A1:B3].Value
– robotik
Jun 20 '17 at 12:52
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Why are floating point numbers inaccurate?
... If you're talking about Python and floating-point, I'd suggest at least including the Python tutorial in your links: docs.python.org/3.4/tutorial/floatingpoint.html That's supposed to be the one-stop go-to resource for floating-point issues for Python programmers. If it's lacking in some ...
SQL Server indexes - ascending or descending, what difference does it make?
...y Optimiser's point of view.
For the table definition
CREATE TABLE T1( [ID] [int] IDENTITY NOT NULL,
[Filler] [char](8000) NULL,
PRIMARY KEY CLUSTERED ([ID] ASC))
The Query
SELECT TOP 10 *
FROM T1
ORDER BY ID DESC
Uses an ordered scan with scan direction BAC...
Check whether an input string contains a number in javascript
My end goal is to validate an input field. The input may be either alphabetic or numeric.
12 Answers
...
Converting JSON data to Java object
... Google's Gson as a potential JSON plugin. Can anyone offer some form of guidance as to how I can generate Java from this JSON string?
Google Gson supports generics and nested beans. The [] in JSON represents an array and should map to a Java collection such as List or just a plain Java array. The ...