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What does 'synchronized' mean?
...rint(String s) {
System.out.println(s+"\n");
}
}
public class TestThread extends Thread {
String name;
TheDemo theDemo;
public TestThread(String name,TheDemo theDemo) {
this.theDemo = theDemo;
this.name = name;
start();
}
@Override
public ...
Ruby's ||= (or equals) in JavaScript?
...
I believe teardown needs to be explicit on jsperf so this test should show the short circuit performance. My guess is that V8 has a special optimization for the form a = a || b.
– jchook
Mar 9 '16 at 2:31
...
Which is faster: multiple single INSERTs or one multiple-row INSERT?
... a time, where I could adjust the value of n before a run.) I also ran the test multiple times for each n.
Doing single VALUE blocks (eg, 1 row at a time) took 5.7 - 5.9 seconds to run. The other values are as follows:
2 rows at a time: 3.5 - 3.5 seconds
5 rows at a time: 2.2 - 2.2 seconds
10 rows...
ORA-12514 TNS:listener does not currently know of service requested in connect descriptor
... v$parameter where name='service_names'
Once I updated tnsnames.ora to:
TEST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = *<validhost>*)(PORT = *<validport>*))
)
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = *<servicena...
How to iterate over rows in a DataFrame in Pandas
...est method for an operation" is "it depends on your data". My advice is to test out different approaches on your data before settling on one.
Further Reading
10 Minutes to pandas, and Essential Basic Functionality - Useful links that introduce you to Pandas and its library of vectorized*/cythonize...
WPF Command Line
...e void OnStartup(StartupEventArgs e)
{
base.OnStartup(e);
if ( /* test command-line params */ )
{
/* do stuff without a GUI */
}
else
{
new Window1().ShowDialog();
}
this.Shutdown();
}
...
Convert Python program to C/C++ code? [closed]
...t works, doing the second version from existing Python (with existing unit tests, and with existing profiling data) will still be faster than trying to do the C code from scratch.
This quote is important.
Thompson's Rule for First-Time Telescope Makers
It is faster to make a four-inch mirror...
accepting HTTPS connections with self-signed certificates
...port the endpoint cert) into a BouncyCastle formatted keystore.
I didn’t test it, but I think the order of importing the certificates is important. This means, import the lowermost Intermediate CA certificate first and then all the way up to the Root CA certificate.
With the following command a ne...
How to retrieve inserted id after inserting row in SQLite using Python?
...ecute('INSERT INTO foo (username,password) VALUES (?,?)',
('test','test'))
print(cursor.lastrowid)
# 1
If two people are inserting at the same time, as long as they are using different cursors, cursor.lastrowid will return the id for the last row that cursor inserted:
cursor.execut...
Two submit buttons in one form
...he first solution shown in Parrot's answer is problematic, as it relies on testing the user-visible value. That is dubious - code that breaks when changing a user-visible word is considered "fragile". The second solution shown in Parrot's answer is fine - it is the same as this one. Parrot's second ...