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When do I need to use AtomicBoolean in Java?
...pent in
managing the synchronization
mechanism itself (waiting, notifying,
etc). Since the new API uses hardware
level constructs (atomic variables)
and wait and lock free algorithms to
implement thread-safety, a lot more
of CPU time is spent "doing stuff"
rather than in managing
synchronization.
no...
Understanding $.proxy() in jQuery
...ary because this is about Context in ECMAScript, the this context variable etc.)
There are three different types of "Contexts" in ECMA-/Javascript:
The global context
Function context
eval context
Every code is executed in its execution context. There is one global context and there can be many...
How to display unique records from a has_many through relationship?
..., :select => "DISTINCT products.*). In the first case, ALL records are fetched and rails removes the duplicates for you. In the later case, only non-duplicate records are fetched from the db so it might offer better performance if you have a large result set.
– mbreining
...
background function in Python
... contexts when there are other "greenlets" running. Worries about locking, etc are much reduced, as there is only one thing running at a time, yet the image will continue to download whenever a blocking operation executes in the "main" context.
Depending on how much, and what kind of thing you want...
How do I programmatically shut down an instance of ExpressJS for testing?
... (like reading config options from a file, loading state from a datastore, etc) that it would be nice to test in the same framework I test everything else. I'd also like to have tests that, for instance, shutdown the server, bring it back up again, and make sure it didn't lose state in the process. ...
Thread pooling in C++11
...ble. You can use vectors with move-only types (unique_ptr, thread, future, etc.).
– Daniel Langr
Dec 20 '17 at 8:12
...
When to favor ng-if vs. ng-show/ng-hide?
... will be instant, whereas ng-if would require re-rendering, binding events etc. The downside as you say, is that creates watches executing in the background. Angular desperately needs ng-ifshowwatch
– poshest
Sep 3 '16 at 12:03
...
When do you use map vs flatMap in RxJava?
...
This does not call subscriber.onError() etc. All the examples I have seen have routed errors that way. Does that not matter?
– Christopher Perry
May 14 '14 at 5:42
...
How do I pull my project from github?
...lone the Repository
Open VS Code (or any IDE/CLI which has command prompt etc.). Go to the directory in which you want to clone, using cd commands, and type the below line.
git config --global github.user yourGitUserName
git config --global user.email your_email
git clone git@github.com:yourGit...
How do I append text to a file?
...ommand with sudo prepended. I recently found out this also works with nano etc (by accidentally trying to nano nano auth...)
– Sandra
May 11 '18 at 23:23
...