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Android: Go back to previous activity
...tp://developer.android.com/reference/android/content/Intent.html
As mentioned in the comments, if the activity is opened with startActivity() then one can close it with finish().
If you wish to use the Up button you can catch that in onOptionsSelected(MenuItem item) method with checking the item I...
Compare object instances for equality by their attributes
...e that in Python 2.5 and onwards, the class must define __eq__(), but only one of __lt__(), __le__(), __gt__(), or __ge__() is needed in addition to that. From that, Python can infer the other methods. See functools for more information.
– kba
Nov 19 '13 at 1:4...
Android Fragment lifecycle over orientation changes
...
You're layering your Fragments one on top of the other.
When a config change occurs the old Fragment adds itself to the new Activity when it's recreated. This is a massive pain in the rear most of the time.
You can stop errors occurring by using the same...
ConcurrentHashMap vs Synchronized HashMap
...re a lock.
Locking the entire collection is a performance overhead. While one thread holds on to the lock, no other thread can use the collection.
ConcurrentHashMap was introduced in JDK 5.
There is no locking at the object level,The locking is at a much finer granularity. For a ConcurrentHashMa...
NuGet auto package restore does not work with MSBuild
...folder.
If you have Nuget 2.7+ installed; it's important to pick one method for > managing Automatic Package Restore in Visual Studio.
Two methods are available:
(Nuget 2.7+): Visual Studio -> Tools -> Package Manager -> Package
Manager Settings -> Enable Auto...
How can I remove or replace SVG content?
...n the update button, it generates a new svg , so I want to remove the old one or update its content.
7 Answers
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insert multiple rows via a php array into mysql
...
Assembling one INSERT statement with multiple rows is much faster in MySQL than one INSERT statement per row.
That said, it sounds like you might be running into string-handling problems in PHP, which is really an algorithm problem, no...
How to detect the current OS from Gradle
... that it's still incubating though.
Mid 2018 Update: just like it was mentioned in comments, now this class moved to a different package, so one should use org.gradle.nativeplatform.platform.OperatingSystem.current()
As of mid 2015, Peter Kahn's answer is still valid. Environment-based profile acti...
How to get the first word of a sentence in PHP?
.... Unless a big array would be created I would go with Elliot version for a one liner.
– Sdlion
Feb 28 '17 at 0:13
What...
Pythonic way to create a long multi-line string
... string if I had the\n energy to type more and more ...'
Finally, one can also construct long lines in Python like this:
s = ("this is a very"
"long string too"
"for sure ..."
)
which will not include any extra blanks or newlines (this is a deliberate example showing wh...