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HashMap and int as key
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You can't use a primitive because HashMap use object internally for the key. So you can only use an object that inherits from Object (that is any object).
That is the function put() in HashMap and as you can see it uses Object for K:
public V put(K key, V value) {
if (key == nu...
Drop columns whose name contains a specific string from pandas DataFrame
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I really wonder what the comments saying this answer is "elegant" means. I myself find it quite obfuscated, when python code should first be readable. It also is twice as slower than the first answer. And it uses the regex keywor...
Is there a standard for storing normalized phone numbers in a database?
...s flexible enough to handle international numbers, and also something that allows the various parts of the number to be queried efficiently.
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How do you force a CIFS connection to unmount
.... Detach the filesystem
from the filesystem hierarchy now, and
cleanup all references to the
filesystem as soon as it is not busy
anymore. (Requires kernel 2.4.11 or
later.)
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How do I see a C/C++ source file after preprocessing in Visual Studio?
...y get link a error saying some obj files cannot be found because it is actually not generated at all.
– smwikipedia
Aug 9 '16 at 2:16
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Need to handle uncaught exception and send log file
...st: filter your activity to be recognized by your exception handler.
Optionally, setup Proguard to strip out Log.d() and Log.v().
Now, here are the details:
(1 & 2) Handle uncaughtException, start send log activity:
public class MyApplication extends Application
{
public void onCreate ()
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jQuery and TinyMCE: textarea value doesn't submit
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Before submitting the form, call tinyMCE.triggerSave();
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What is an IIS application pool?
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Application pools allow you to isolate your applications from one another, even if they are running on the same server. This way, if there is an error in one app, it won't take down other applications.
Additionally, applications pools allow ...
How do I close an open port from the terminal on the Mac?
...t be the first attempt to kill a process, and it a very bad habit. As I recall, you should first just use kill PID(which implies -15), then try -2 and -1. -9 is the last resort only if every other options failed to work.
– Meow
Oct 8 '14 at 8:31
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A beginner's guide to SQL database design [closed]
...le, link to an address in a separate addresses table, for example.
I personally like having an integer or long surrogate key on each table (that holds data, not those that link different tables together, e,g., m:n relationships) that is the primary key.
I also like having a created and modified time...