大约有 3,517 项符合查询结果（耗时：0.0186秒） [XML]
C++, copy set to vector
...n output iterator directly to std::copy, you must make sure it points to a range that is at least large enough to hold the input range.
std::back_inserter creates an output iterator that calls push_back on a container for each element, so each element is inserted into the container. Alternatively,...
How do you calculate the average of a set of circular data? [closed]
.... The first line computes the relative angle of a with respect to b in the range [-180, 179], the second computes the middle angle from that. I'd use b + diff/2 instead of a - diff/2 for clarity.
– starblue
Jul 21 '09 at 14:42
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Initialise a list to a specific length in Python [duplicate]
...ally-empty dict ten times, not ten distinct ones. Rather, use [{} for i in range(10)] or similar constructs, to construct ten separate dicts to make up your list.
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Which C++ idioms are deprecated in C++11?
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Actually there is a good excuse. You're using Boost.Range's algorithms, which are much nicer ;)
– Nicol Bolas
Feb 15 '12 at 18:42
10
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Can I convert long to int?
...method
But it will throw an OverflowException if it the value is outside range of the Int32 Type.
A basic test will show us how it works:
long[] numbers = { Int64.MinValue, -1, 0, 121, 340, Int64.MaxValue };
int result;
foreach (long number in numbers)
{
try {
result = Convert.ToInt32...
Get key by value in dictionary
...n each method 100000 times:
Method 1:
>>> profile.run("for i in range(0,100000): method1(list,16)")
200004 function calls in 1.173 seconds
Method 2:
>>> profile.run("for i in range(0,100000): method2(list,16)")
200004 function calls in 1.222 seconds
Method 3:
>...
Javascript - get array of dates between 2 dates
I'd like "range" to be an array of date objects, one for each day between the two dates.
24 Answers
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Usage of sys.stdout.flush() method
...ider the following simple Python script:
import time
import sys
for i in range(5):
print(i),
#sys.stdout.flush()
time.sleep(1)
This is designed to print one number every second for five seconds, but if you run it as it is now (depending on your default system buffering) you may not s...
Python: Making a beep noise
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This one is neat: def annoy(): for i in range(1, 10): winsound.Beep(i * 100, 200)
– Skurmedel
Jun 30 '11 at 15:56
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convert double to int
...etc - although you'll still need a cast afterwards.
Don't forget that the range of int is much smaller than the range of double. A cast from double to int won't throw an exception if the value is outside the range of int in an unchecked context, whereas a call to Convert.ToInt32(double) will. The r...