大约有 43,200 项符合查询结果（耗时：0.0507秒） [XML]
Analyze audio using Fast Fourier Transform
...ly spaced frequencies, starting at 0. Because your sampling frequency is 44100 samples / sec. and the number of points in your FFT is 256, your frequency spacing is 44100 / 256 = 172 Hz (approximately)
The first coefficient in your array will be the 0 frequency coefficient. That is basically the av...
Why is Go so slow (compared to Java)?
As we could see from The Computer Language Benchmarks Game in 2010:
10 Answers
10
...
Alter Table Add Column Syntax
...
198
Just remove COLUMN from ADD COLUMN
ALTER TABLE Employees
ADD EmployeeID numeric NOT NULL ID...
binning data in python with scipy/numpy
...
184
It's probably faster and easier to use numpy.digitize():
import numpy
data = numpy.random.ran...
Generate random password string with requirements in javascript
...
18 Answers
18
Active
...
How I can I lazily read multiple JSON values from a file/stream in Python?
...
11 Answers
11
Active
...
Get current time in milliseconds in Python?
...
13 Answers
13
Active
...
How to correctly close a feature branch in Mercurial?
...
218
One way is to just leave merged feature branches open (and inactive):
$ hg up default
$ hg mer...
Signed to unsigned conversion in C - is it always safe?
...swer
Your i will be converted to an unsigned integer by adding UINT_MAX + 1, then the addition will be carried out with the unsigned values, resulting in a large result (depending on the values of u and i).
Long Answer
According to the C99 Standard:
6.3.1.8 Usual arithmetic conversions
...
Running a cron job at 2:30 AM everyday
...
541
crontab -e
add:
30 2 * * * /your/command
...