大约有 3,516 项符合查询结果（耗时：0.0137秒） [XML]
How can I time a code segment for testing performance with Pythons timeit?
...)
import time
def myfast():
code
n = 10000
t0 = time.time()
for i in range(n): myfast()
t1 = time.time()
total_n = t1-t0
In Windows, as Corey stated in the comment, time.clock() has much higher precision (microsecond instead of second) and is preferred over time.time().
...
Go Unpacking Array As Arguments
...n
import "fmt"
func my_func( args ...int) int {
sum := 0
for _,v := range args {
sum = sum + v
}
return sum;
}
func main() {
arr := []int{2,4}
sum := my_func(arr...)
fmt.Println("Sum is ", sum)
}
Now you can sum as many things as you'd like. Notice the important .....
Convert int to ASCII and back in Python
...
chr words in the range of the ascii characters (0 - 255), however, unichr works for the unicode character set.
– Shivendra Soni
Aug 15 '18 at 19:41
...
How to add title to subplots in Matplotlib?
...ke it shorter, you could write :
import matplolib.pyplot as plt
for i in range(4):
plt.subplot(2,2,i+1).set_title('Subplot n°{}' .format(i+1))
plt.show()
It makes it maybe less clear but you don't need more lines or variables
...
Using Linq to get the last N elements of a collection?
...by an order of magnitude. If the IEnumerable is calculated (via Enumerable.Range, e.g.), James's solution takes longer. I can't think of any way to guarantee a single pass without either knowing something about the implementation or copying values to a different data structure.
...
Select 50 items from list at random to write to file
...ce is a possible
selection in the sample.
To choose a sample in a range of integers, use xrange as an argument.
This is especially fast and space efficient for sampling from a
large population: sample(xrange(10000000), 60)
...
Input size vs width
...RUxkBbV-q561I6kFtXRa8TVwTICgirnJhmVJw.woff2) format('woff2');
unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2212, U+2215;
}
@font-face {
font-family: 'Open Sans Condensed';
font-style: normal;
font-weight: 300;
src:...
Why can I pass 1 as a short, but not the int variable i?
...int, or ulong, provided the value of the constant-expression is within the range of the destination type.
A constant-expression of type long can be converted to type ulong, provided the value of the constant-expression is not negative.
(Quoted from C# Language Specification Version 3.0)
...
Iteration over std::vector: unsigned vs signed index variable
...on't know. That will ensure your code runs as generic as possible.
Using Range C++11
for(auto const& value: a) {
/* std::cout << value; ... */
Using indices
for(std::vector<int>::size_type i = 0; i != v.size(); i++) {
/* std::cout << v[i]; ... */
}
Using arra...
Map and Reduce in .NET
... already has it albeit under different names.
Map is Select:
Enumerable.Range(1, 10).Select(x => x + 2);
Reduce is Aggregate:
Enumerable.Range(1, 10).Aggregate(0, (acc, x) => acc + x);
Filter is Where:
Enumerable.Range(1, 10).Where(x => x % 2 == 0);
https://www.justinshield.com/20...