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Using the RUN instruction in a Dockerfile with 'source' does not work
... base image. I generally add this line for every Dockerfile I write.
Edit by a concerned bystander
If you want to get the effect of "use bash instead of sh throughout this entire Dockerfile", without altering and possibly damaging* the OS inside the container, you can just tell Docker your intenti...
Rename multiple files by replacing a particular pattern in the filenames using a shell script [dupli
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You can use rename utility to rename multiple files by a pattern. For example following command will prepend string MyVacation2011_ to all the files with jpg extension.
rename 's/^/MyVacation2011_/g' *.jpg
or
rename <pattern> <replacement> <file-list>
...
Why .NET String is immutable? [duplicate]
... of the same principle. I once produced a memory saving of about half a GB by comparing immutable objects and replacing references to duplicates so that they all pointed to the same instance (time-consuming, but a minute's extra start-up to save a massive amount of memory was a performance win in th...
Randomize a List
...viceProvider();
int n = list.Count;
while (n > 1)
{
byte[] box = new byte[1];
do provider.GetBytes(box);
while (!(box[0] < n * (Byte.MaxValue / n)));
int k = (box[0] % n);
n--;
T value = list[k];
list[k] = list[n];
lis...
Super-simple example of C# observer/observable with delegates
I recently started digging into C# but I can't by my life figure out how delegates work when implementing the observer/observable pattern in the language.
...
Set active tab style with AngularJS
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One way of doing this would be by using ngClass directive and the $location service. In your template you could do:
ng-class="{active:isActive('/dashboard')}"
where isActive would be a function in a scope defined like this:
myApp.controller('MyCtrl', f...
What is the JavaScript convention for no operation?
...ight be some performance issues associated with this (as is also mentioned by others in comments or in other answers).
However, that being said, you can easily define your own noop function and, infact, many libraries and frameworks also provide noop functions. Below are some examples:
var noop = ...
Filter by process/PID in Wireshark
...xperimental build that does this, as described on the mailing list, Filter by local process name
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How to re-open an issue in github?
...sues if you closed them yourself
you cannot close or re-open issues opened by someone else
you cannot re-open your own issues if a repo collaborator closed them
The situation you report falls in the last case, so you cannot reopen it. You can ask in the issue thread if a repo collaborator can reop...
How to understand nil vs. empty vs. blank in Ruby
...clear definition of the differences of nil? , blank? , and empty? in Ruby on Rails. Here's the closest I've come:
14 A...