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I lose my data when the container exits
...
You need to commit the changes you make to the container and then run it. Try this:
sudo docker pull ubuntu
sudo docker run ubuntu apt-get install -y ping
Then get the container id using this command:
sudo docker ps -l
Commit chan...
What exactly does the “u” do? “git push -u origin master” vs “git push origin master”
...es not tell me, either. Please
specify which branch you want to use on the command line and
try again (e.g. 'git pull <repository> <refspec>').
See git-pull(1) for details.
If you often merge with the same branch, you may want to
use something like the following in your configuration fi...
What's the best way to communicate between view controllers?
...lar and reusable. And if you think about where the Stanford presenters are coming from (i.e., as Apple employees their job is to build classes that can easily be reused), reusability and modularity are high priorities. All of the best practices they mention for sharing data are part of dependency in...
Array Length in Java
... @PhilipRego It's in the language specification docs.oracle.com/javase/specs/jls/se8/html/jls-10.html#jls-10.3
– Torben
Apr 5 '19 at 7:12
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django template display item value or empty string
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In C# what is the difference between ToUpper() and ToUpperInvariant()?
...because it bit me years ago in Java, where I was upper-casing a string and comparing it with "MAIL". That didn't work so well in Turkey...
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How to read keyboard-input?
... can keep doing stuff instead of blocking on keyboard input: stackoverflow.com/a/53344690/4561887
– Gabriel Staples
Nov 16 '18 at 20:10
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What's the difference between “Write-Host”, “Write-Output”, or “[console]::WriteLine”?
... There is new guidance: avoid using Write-Output when possible. See github.com/PoshCode/PowerShellPracticeAndStyle/issues/… > Use return only for ending execution. > Avoid Write-Output (...). Instead, when you want to make output clearer, just assign output to a relevantly named variable. ...
Test if object implements interface
...or is null safe (the code you posted isn't).
instanceof is the built-in, compile-time safe alternative to Class#isInstance(Object)
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What are some uses of decltype(auto)?
... edited May 23 '17 at 12:02
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answered Jun 8 '14 at 19:07
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