大约有 11,400 项符合查询结果（耗时：0.0270秒） [XML]
How to tell whether a point is to the right or left side of a line
...arate them into 2 distinct sets. To do this, I choose two points ( a and b ) and draw an imaginary line between them. Now I want to have all points that are left from this line in one set and those that are right from this line in the other set.
...
The multi-part identifier could not be bound
I've seen similar errors on SO, but I don't find a solution for my problem.
I have a SQL query like:
15 Answers
...
Array.sort() doesn't sort numbers correctly [duplicate]
In Chrome 14, and Firefox 5 (haven't tested other browsers), the following code doesn't sort the numbers correctly:
5 Answe...
How to use R's ellipsis feature when writing your own function?
...R language has a nifty feature for defining functions that can take a variable number of arguments. For example, the function data.frame takes any number of arguments, and each argument becomes the data for a column in the resulting data table. Example usage:
...
Flatten nested dictionaries, compressing keys
...
Basically the same way you would flatten a nested list, you just have to do the extra work for iterating the dict by key/value, creating new keys for your new dictionary and creating the dictionary at final step.
import coll...
Find row where values for column is maximal in a pandas DataFrame
...s np
>>> df = pandas.DataFrame(np.random.randn(5,3),columns=['A','B','C'])
>>> df
A B C
0 1.232853 -1.979459 -0.573626
1 0.140767 0.394940 1.068890
2 0.742023 1.343977 -0.579745
3 2.125299 -0.649328 -0.211692
4 -0.187253 1.908618 -1.862934
>>...
Setting git parent pointer to a different parent
If I have a commit in the past that points to one parent, but I want to change the parent that it points to, how would I go about doing that?
...
How to Right-align flex item?
Is there a more flexbox-ish way to right-align "Contact" than to use position: absolute ?
13 Answers
...
PHP Sort a multidimensional array by element containing date
...
Use usort() and a custom comparison function:
function date_compare($a, $b)
{
$t1 = strtotime($a['datetime']);
$t2 = strtotime($b['datetime']);
return $t1 - $t2;
}
usort($array, 'date_compare');
EDIT: Your data is organized in an array of arrays. To better distinguish those, le...
The modulo operation on negative numbers in Python
I've found some strange behaviour in Python regarding negative numbers:
8 Answers
8
...