大约有 24,000 项符合查询结果（耗时：0.0326秒） [XML]
Remove rows with duplicate indices (Pandas DataFrame and TimeSeries)
...-1]
df = df.iloc[ np.unique( df.index.values, return_index = True )[1] ]
Tests: 10k loops using OP's data
numpy method - 3.03 seconds
df.loc[~df.index.duplicated(keep='first')] - 4.43 seconds
df.groupby(df.index).first() - 21 seconds
reset_index() method - 29 seconds
...
How do I redirect output to a variable in shell? [duplicate]
...te process forks. That another reason that I had to add parenthesis. echo "test" | (read ROLE_X; echo $ROLE_X ) Read more about this forking at stackoverflow.com/a/13764018/117471
– Bruno Bronosky
Apr 7 '15 at 21:10
...
How to do an update + join in PostgreSQL?
...ulatedvalue
from t
where id = t.rowid
This approach lets you develop and test your select query and in two steps convert it to the update query.
So in your case the result query will be:
with t as (
select v.id as rowid, s.price_per_vehicle as calculatedvalue
from vehicles_vehicle v
...
How to change spinner text size and text color?
... work with android.support.v7.widget.AppCompatSpinner here is the simplest tested solution using styles:
<android.support.v7.widget.AppCompatSpinner
android:id="@+id/spefcialFx"
style="@style/Widget.AppCompat.Spinner.Underlined"
androi...
What is the difference between vmalloc and kmalloc?
...ory at boot.
*) This was true of earlier kernels. On recent kernels (I tested this on 2.6.33.2), max size of a single kmalloc is up to 4 MB! (I wrote a fairly detailed post on this.) — kaiwan
For a system call you don't need to pass GFP_ATOMIC to kmalloc(), you can use GFP_KERNEL. You're not...
Python timedelta in years
... accommodate the 0.08% of the population born on the 29th by inverting the test from "is birthday after today" to "is birthday before today". Does that solve it?
– John Mee
Dec 1 '09 at 4:35
...
UIActivityViewController crashing on iOS 8 iPads
I am currently testing my app with Xcode 6 (Beta 6). UIActivityViewController works fine with iPhone devices and simulators but crashes with iPad simulators and devices (iOS 8) with following logs
...
Algorithm to find Largest prime factor of a number
...e you've decided on how to split a number into two factors, here is the fastest algorithm I can think of to find the largest prime factor of a number:
Create a priority queue which initially stores the number itself. Each iteration, you remove the highest number from the queue, and attempt to split...
Retrieve the position (X,Y) of an HTML element relative to the browser window
... in the body. Meouw's solution works perfectly. If you want I have a small test to demonstrate the problem.
– CpnCrunch
Jul 1 '14 at 2:30
5
...
Create a GUID in Java
...OM = ThreadLocal.withInitial(SecureRandom::new);
}
/**
* For tests!
*/
public static void main(String[] args) {
System.out.println("// Using thread local `java.security.SecureRandom` (DEFAULT)");
System.out.println("RandomUuidCreator.getRandomUuid()");
...