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Java: recommended solution for deep cloning/copying an instance
...PI's above provide a good control over what to and what not to clone (for example using transient, or String[] ignoreProperties), so reinventing the wheel isn't preferred.
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What is the difference between UNION and UNION ALL?
...u do not want the duplicates (especially when developing reports).
UNION Example:
SELECT 'foo' AS bar UNION SELECT 'foo' AS bar
Result:
+-----+
| bar |
+-----+
| foo |
+-----+
1 row in set (0.00 sec)
UNION ALL example:
SELECT 'foo' AS bar UNION ALL SELECT 'foo' AS bar
Result:
+-----+
| b...
How can I do DNS lookups in Python, including referring to /etc/hosts?
...ment: the result may be cached by the local resolver. nscd and nslcd on Unix boxes can do this. It could also be cached by a local name server configured for caching (a common setup, once upon a time. Probably not so much now). It's not a straightforward ‘no’ answer, unfortunately. These things ...
Detecting WPF Validation Errors
... based on errors thrown in your Data Layer during Data Binding using the ExceptionValidationRule or DataErrorValidationRule .
...
How do I get the name of the current executable in C#?
I want to get the name of the currently running program, that is the executable name of the program. In C/C++ you get it from args[0] .
...
How do I test a private function or a class that has private methods, fields or inner classes?
How do I unit test (using xUnit) a class that has internal private methods, fields or nested classes? Or a function that is made private by having internal linkage ( static in C/C++) or is in a private ( anonymous ) namespace?
...
What are the differences between json and simplejson Python modules?
...o use one or the other as a fallback.
try:
import simplejson as json
except ImportError:
import json
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Hide Twitter Bootstrap nav collapse on click
...av a').on('click', function(){
$('.btn-navbar').click(); //bootstrap 2.x
$('.navbar-toggle').click(); //bootstrap 3.x by Richard
$('.navbar-toggler').click(); //bootstrap 4.x
});
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Should commit messages be written in present or past tense? [closed]
...plicit question, "what will applying this changeset/patch do?" It will "Fix the XXX bug in YYY"!
For other verbs writing them as a command seems more natural, and works better if you have a specific goal up-front—you can literally write the commit summary along with up-front tests before the wor...