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libcurl的使用总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...等待时间
7. CURLOPT_FOLLOWLOCATION
设置重定位URL
CURLOPT_RANGE: CURLOPT_RESUME_FROM:
断点续传相关设置。CURLOPT_RANGE 指定char *参数传递给libcurl，用于指明http域的RANGE头域，例如：
表示头500个字节：bytes=0-499
表示第二个500字节：bytes=5...
How to use MySQL DECIMAL?
...xact representations, but they take up a lot more space for a much smaller range of possible numbers. To create a column capable of holding values from 0.0001 to 99.9999 like you asked you would need the following statement
CREATE TABLE your_table
(
your_column DECIMAL(6,4) NOT NULL
);
The co...
Python how to write to a binary file?
...knowing that the data you are writing all falls inside the printable ascii range. However, you are correct I think in this case, since the example data includes non printable characters.
– Perkins
Aug 21 '13 at 20:30
...
How to use OR condition in a JavaScript IF statement?
... @Murplyx: In most cases yes, but numbers outside the 32 bit range can fail. (Math.pow(2,32)-1) ^ 0; // -1 (success) ... Math.pow(2,32) ^ 0; // 0 (failure)
– user1106925
May 12 '16 at 0:44
...
How to find all occurrences of an element in a list?
...
Or Use range (python 3):
l=[i for i in range(len(lst)) if lst[i]=='something...']
For (python 2):
l=[i for i in xrange(len(lst)) if lst[i]=='something...']
And then (both cases):
print(l)
Is as expected.
...
Timeout on a function call
...at.
Code
import multiprocessing
import time
# bar
def bar():
for i in range(100):
print "Tick"
time.sleep(1)
if __name__ == '__main__':
# Start bar as a process
p = multiprocessing.Process(target=bar)
p.start()
# Wait for 10 seconds or until process finishes
...
Why can't I use a list as a dict key in python?
...on).
Some Timings for Example 3
>>> lists_list = [[i] for i in range(1000)]
>>> stupidlists_set = {stupidlist3([i]) for i in range(1000)}
>>> tuples_set = {(i,) for i in range(1000)}
>>> l = [999]
>>> s = stupidlist3([999])
>>> t = (999,)
>...
Find the division remainder of a number
...'s because Python's % performs a true modulus, which returns values on the range [0, divisor) and pairs well with floored division (towards negative infinity). C languages use the % operator for remainder operations which returns values on the range (-divisor, divisor) and pairs well with standard d...
How do I use arrays in C++?
...ointer assignment makes sense), array-to-pointer decay kicks in as usual.
Ranges
An array of type T[n] has n elements, indexed from 0 to n-1; there is no element n. And yet, to support half-open ranges (where the beginning is inclusive and the end is exclusive), C++ allows the computation of a poi...
How to calculate moving average using NumPy?
...[n:] = ret[n:] - ret[:-n]
return ret[n - 1:] / n
>>> a = np.arange(20)
>>> moving_average(a)
array([ 1., 2., 3., 4., 5., 6., 7., 8., 9., 10., 11.,
12., 13., 14., 15., 16., 17., 18.])
>>> moving_average(a, n=4)
array([ 1.5, 2.5, 3....