大约有 47,000 项符合查询结果（耗时：0.0373秒） [XML]
How do I select elements of an array given condition?
Suppose I have a numpy array x = [5, 2, 3, 1, 4, 5] , y = ['f', 'o', 'o', 'b', 'a', 'r'] . I want to select the elements in y corresponding to elements in x that are greater than 1 and less than 5.
...
Operation on every pair of element in a list
... module. It does exactly what you describe.
import itertools
my_list = [1,2,3,4]
for pair in itertools.product(my_list, repeat=2):
foo(*pair)
This is equivalent to:
my_list = [1,2,3,4]
for x in my_list:
for y in my_list:
foo(x, y)
Edit: There are two very similar functions as...
Better techniques for trimming leading zeros in SQL Server?
...
15 Answers
15
Active
...
Calculate last day of month in JavaScript
...
var month = 0; // January
var d = new Date(2008, month + 1, 0);
alert(d); // last day in January
IE 6: Thu Jan 31 00:00:00 CST 2008
IE 7: Thu Jan 31 00:00:00 CST 2008
IE 8: Beta 2: Thu Jan 31 00:00:00 CST 2008
Opera 8.54: ...
Why is printing to stdout so slow? Can it be sped up?
...
159
How can it be that writing to physical disk is WAY faster than writing to the "screen" (pre...
Simple way to create matrix of random numbers
...
13 Answers
13
Active
...
UIRefreshControl - beginRefreshing not working when UITableViewController is inside UINavigationCont
...
15 Answers
15
Active
...
Maven Snapshot Repository vs Release Repository
...ring development. A Snapshot artifact has both a version number such as “1.3.0” or “1.3” and a timestamp. For example, a snapshot artifact for commons-lang 1.3.0 might have the name commons-lang-1.3.0-20090314.182342-1.jar.
Taken from refcard
...
How can I split and parse a string in Python?
...
142
"2.7.0_bf4fda703454".split("_") gives a list of strings:
In [1]: "2.7.0_bf4fda703454".split("...
Check if a string contains a string in C++
...
12 Answers
12
Active
...