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What is the most efficient way to concatenate N arrays?
...method confers a huge performance advantage (~100x) over the simple concat call. I'm dealing with very long lists of short lists of integers, in v8/node.js.
– chbrown
Jul 14 '12 at 3:28
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How do I use DateTime.TryParse with a Nullable?
... I probably shouldn't argue with The Skeet, but... you should call your method Parse, since I would expect a method called TryParse to follow the TryParse convention and return a boolean. ;-)
– Myster
Apr 12 '15 at 22:09
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Get a list of all threads currently running in Java
... = rootGroup.getParent()) != null) {
rootGroup = parentGroup;
}
Now, call the enumerate() function on the root group repeatedly. The second argument lets you get all threads, recursively:
Thread[] threads = new Thread[rootGroup.activeCount()];
while (rootGroup.enumerate(threads, true ) == thr...
Changing the interval of SetInterval while it's running
...
Use setTimeout() instead. The callback would then be responsible for firing the next timeout, at which point you can increase or otherwise manipulate the timing.
EDIT
Here's a generic function you can use to apply a "decelerating" timeout for ANY functi...
Regex exactly n OR m times
Consider the following regular expression, where X is any regex.
6 Answers
6
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Are booleans as method arguments unacceptable? [closed]
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Late comment, but @Jay Bazuzi: If your method is called turnLightOn, and you pass in false, you may as well not call the method at all, passing in false says don't turn the light on. If the light is already on, it doesn't mean turn it off, it means don't turn it on... If yo...
Detect IF hovering over element with jQuery
I'm not looking for an action to call when hovering, but instead a way to tell if an element is being hovered over currently. For instance:
...
Find current directory and file's directory [duplicate]
...ative to the current working directory and is not changed by an os.chdir() call.)
To get the current working directory use
import os
cwd = os.getcwd()
Documentation references for the modules, constants and functions used above:
The os and os.path modules.
The __file__ constant
os.path.re...
Test if string is a guid without throwing exceptions?
... if class identifier was obtained successfully
/// Negative if the call failed
/// </returns>
[DllImport("ole32.dll", CharSet = CharSet.Unicode, ExactSpelling = true, PreserveSig = true)]
public static extern int CLSIDFromString(string sz, out Guid clsid);
}...
How can I output UTF-8 from Perl?
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I didn't know about this (I've only been putting UTF8 in a database, never printing it). +1.
– Paul Tomblin
Mar 9 '09 at 19:37
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