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defaultdict of defaultdict?
...ultdict(int)) will be called when you try to access a key that don't exist and the return value of it will be set as the new value of this key which mean in our case the value of d[Key_dont_exist] will be defaultdict(int), and if you try to access a key from this last defaultdict i.e. d[Key_dont_exi...
Can I add a custom attribute to an HTML tag?
...o verify this behavior: "If you download the sample files for this article and validate file internal.html, you can see this for yourself. Unfortunately, when you display the file in a browser, the ]> shows up on the screen. There’s no way around this bug, so this approach is right out."
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Text vertical alignment in WPF TextBlock
...ure that's always true. I've got this set-up, the border has height "Auto" and it's working fine. It's in a grid cell with starred row heights (and other things in the row).
– Bob Sammers
Apr 29 '15 at 7:17
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What are the recommendations for html tag?
...re deciding whether to use the <base> tag or not, you need to understand how it works, what it can be used for and what the implications are and finally outweigh the advantages/disadvantages.
The <base> tag mainly eases creating relative links in templating languages as you don't need...
log4j configuration via JVM argument(s)?
...o I have to set/pass as arguments to the JVM to get log4j to run properly? And by properly I mean not complain and print to the console. Can I see a typical example?
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returning a Void object
...id.
So any of the following would suffice:
parameterizing with Object and returning new Object() or null
parameterizing with Void and returning null
parameterizing with a NullObject of yours
You can't make this method void, and anything else returns something. Since that something is ignored,...
How to show full object in Chrome console?
... It should be noted that just printing varName in Chrome console and hitting Enter gives the same effect as console.dir(varName).
– Vadzim
Oct 16 '17 at 14:58
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Negation in Python
...an simply use os.mkdir() to get the result you need, with added exception handling goodness.
Example:
blues_sounds_path = "/usr/share/sounds/blues"
if not os.path.exists(blues_sounds_path):
try:
os.mkdir(blues_sounds_path)
except OSError:
# Handle the case where the directo...
Volatile vs. Interlocked vs. lock
...he point of volatile is that multiple threads running on multiple CPUs can and will cache data and re-order instructions.
If it is not volatile, and CPU A increments a value, then CPU B may not actually see that incremented value until some time later, which may cause problems.
If it is volatile, th...
Differences between Proxy and Decorator Pattern
Can you give any good explanation what is the difference between Proxy and Decorator ?
8 Answers
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