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Why are static variables considered evil?
...data is encapsulated in objects (that can be extended, information hiding, etc). Statics, in the way you are describing using them, are essentially to use them as a global variable to avoid dealing with issues like scope. However, global variables is one of the defining characteristics of procedural...
What is Java String interning?
...exists even without interning (since GC is non-deterministic to start with etc), but it makes it somewhat worse. It's always a good idea to use char[] instead of String for sensitive text and zero it out as soon as it's no longer needed.
– chris
Apr 26 '17 at 1...
Why does the default parameterless constructor go away when you create one with parameters
...you accidentally end up not excluding it, you can screw up your invariants etc.
– Jon Skeet
Aug 3 '12 at 8:56
2
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What is an 'endpoint' in Flask?
...r Y reasons (someone refactored the code and found a more appropriate name etc...). The auto-generated endpoints by Flask helps you handle the changes of url. The explicit endpoint helps you deal with url changes and name changes of your func.
– IMCoins
Feb 20 ...
Android splash screen image sizes to fit all devices
...ndroid Developer Guide
Design images that have areas that can be safely stretched without compromising the end result
With this, Android will select the appropriate file for the device's image density, then it will stretch the image according to the 9-patch standard.
end of tl;dr. Full post ahead...
How to see which commits in one branch aren't in the other?
...hen check out a new branch, add some more, commit, check out a new branch, etc, until I have my big feature broken out into several sub-features. The problem is that my 30 commits are intermingled with the other 200 commits from other people due to my git merge master into my feature_branch, so reba...
What is the difference between integration and unit tests?
...sses use third-party classes (the String/string class, collection classes, etc.) which don't make sense to be mocked or isolated from; we simply regard them as stable and reliable dependencies which are outside the testing scope.
– Rogério
Apr 22 '15 at 21:58
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How to load/edit/run/save text files (.py) into an IPython notebook cell?
... I use windows and tried !dir, output !dir Volume in drive D is Documents etc... So it's not just bash but cmd as well!
– brian
Aug 22 '15 at 3:08
1
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How to pass the values from one activity to previous activity
...,putInt(),putFloat(),putLong() you can save your desired dtatype.
How to fetch
SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(this);
String userName = sharedPref.getString("userName", "Not Available");
http://developer.android.com/reference/android/content/SharedPre...
Are non-synchronised static methods thread safe if they don't modify static class variables?
... share data between threads - you must take care of atomicity, visibility, etc.
This method only operates on parameters, which reside on stack and references to immutable objects on heap. Stack is inherently local to the thread, so no sharing of data occurs, ever.
Immutable objects (String in this...