大约有 15,000 项符合查询结果（耗时：0.0314秒） [XML]
Cast List to List in .NET 2.0
...new int[] { 1,2,3 } );
List<string> l2 = l1.ConvertAll<string>(x => x.ToString());
share
|
improve this answer
|
follow
|
...
How can I eliminate slow resolving/loading of localhost/virtualhost (a 2-3 second lag) on Mac OS X L
Since setting up my development environments on Mac OS X Lion (brand new macbook air purchased in January 2012), I have noticed that resolving to a virtual host is very slow (around 3 seconds) the first time but after that is fast as long as I continue loading it regularly.
...
How can I check if a var is a string in JavaScript?
...ed answer at who is more near to my specific problem, that I've not fully explained.
– vitto
Jun 9 '11 at 0:04
this wo...
How to sort a list of strings numerically?
... you want is:
list1 = ["1","10","3","22","23","4","2","200"]
list1 = [int(x) for x in list1]
list1.sort()
If for some reason you need to keep strings instead of ints (usually a bad idea, but maybe you need to preserve leading zeros or something), you can use a key function. sort takes a named par...
Google Maps v3 - limit viewable area and zoom level
....
You can also limit the zoom level very easily.
Consider the following example: Fiddle Demo
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>Google Maps JavaScript API v3 Example: Limit Panning and Zo...
One-liner to take some properties from object in ES 6
...for the v parameter.
({id, title}) => ({id, title})
(See a runnable example in this other answer).
@EthanBrown's solution is more general. Here is a more idiomatic version of it which uses Object.assign, and computed properties (the [p] part):
function pick(o, ...props) {
return Object.a...
deleting rows in numpy array
...rom arrays is the numpy.delete method.
Suppose I have the following array x:
x = array([[1,2,3],
[4,5,6],
[7,8,9]])
To delete the first row, do this:
x = numpy.delete(x, (0), axis=0)
To delete the third column, do this:
x = numpy.delete(x,(2), axis=1)
So you could find the ...
How to get the difference between two arrays in JavaScript?
...
1
2
3
Next
230
...
How can I strip the whitespace from Pandas DataFrame headers?
I am parsing data from an Excel file that has extra white space in some of the column headings.
3 Answers
...
How to retrieve an element from a set without removing it?
...le set:
for e in s:
break
# e is now an element from s
Or...
e = next(iter(s))
But in general, sets don't support indexing or slicing.
share
|
improve this answer
|
...