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Execute combine multiple Linux commands in one line
...for example myscript, and make it executable:
chmod +x myscript
You can now execute that script like other programs on the machine. But if you don't place it inside a directory listed in your PATH environment variable (for example /usr/local/bin, or on some Linux distributions ~/bin), then you wi...
Deleting queues in RabbitMQ
I have a few queues running with RabbitMQ. A few of them are of no use now, how can I delete them? Unfortunately I had not set the auto_delete option.
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Create a submodule repository from a folder and keep its git commit history
... It contains some web demos in a demos folder and one of the demo should now have it's own repository. I would like to create a separate repository for this demo application and make it a subpackage submodule from main repository without losing its commit history.
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How to concatenate items in a list to a single string?
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It's very useful for beginners to know
why join is a string method.
It's very strange at the beginning, but very useful after this.
The result of join is always a string, but the object to be joined can be of many types (generators, list, tuples, etc).
.jo...
Get the current language in device
...ot change based on orientation, etc).
Because getConfiguration.locale has now been deprecated, the preferred way to get the primary locale in Android Nougat is:
Resources.getSystem().getConfiguration().getLocales().get(0);
To guarantee compatibility with the previous Android versions a possible ...
Converting an array of objects to ActiveRecord::Relation
...e def self.subjects variety, scopes, etc) on this array. The only way I know to run class methods on a group of objects is to have them be an ActiveRecord::Relation. So I end up resorting to adding a to_indicators method to Array .
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Does adding a duplicate value to a HashSet/HashMap replace the previous value
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ah I get it now. I understood that the key is the element of the Set, but just realized that put() will only override the value, not the key. In this case, it's the same value put alongside the key again, which may or may not be better t...
How do I pass data between Activities in Android application?
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Hey, I know this thread was quite a while back, but the link provided is now a dead end. Is there anywhere I can find the example?
– JuiCe
Jun 15 '12 at 14:38
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Reusing output from last command in Bash
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f() { bash -c "$BASH_COMMAND" >& /tmp/out.log; }
trap 'f' DEBUG
Now most recently executed command's stdout and stderr will be available in /tmp/out.log
Only downside is that it will execute a command twice: once to redirect output and error to /tmp/out.log and once normally. Probably th...
Why generate long serialVersionUID instead of a simple 1L?
...glected to use a serialVersionUID before, and then made a change that you know should be compatible but which causes serialization to break.
See the Java Serialization Spec for more details.
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