大约有 7,000 项符合查询结果（耗时：0.0376秒） [XML]
In Django, how does one filter a QuerySet with dynamic field lookups?
...swered May 23 '13 at 15:55
Brent81Brent81
9261010 silver badges1919 bronze badges
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Apply multiple functions to multiple groupby columns
...8 0.076037 0.166946 0.439661 0.914612 1
3 0.133466 0.447946 0.014815 0.130781 0.268290 1
In [26]: f = {'A':['sum','mean'], 'B':['prod']}
In [27]: df.groupby('GRP').agg(f)
Out[27]:
A B
sum mean prod
GRP
0 0.719580 0.359790 0.1020...
Mercurial move changes to a new branch
...rebase extension. Suppose you have a history like this:
@ changeset: 2:81b92083cb1d
| tag: tip
| summary: my new feature: edit file a
|
o changeset: 1:8bdc4508ac7b
| summary: my new feature: add file b
|
o changeset: 0:d554afd54164
summary: initial
This means, r...
How can I profile C++ code running on Linux?
... 1 1 0.1 0.1 0.25974026
0.1 0.9 0.81 0.081 0.181 0.47012987
0.1 0.8 0.64 0.064 0.245 0.636363636
0.1 0.7 0.49 0.049 0.294 0.763636364
0.1 0.6 0.36 0.036 ...
Can a class member function template be virtual?
...swered May 24 '10 at 14:08
Brent81Brent81
9261010 silver badges1919 bronze badges
...
How do Trigonometric functions work?
...x3/6+x5
Chebyshev: max error around 6e-7, f(x) = 0.999995x-0.1666016x3+0.0081215x5
Range = -pi/4 to +pi/4, degree 7 (4 terms)
Taylor: max error around 3e-7, f(x) = x-x3/6+x5/120-x7/5040
Chebyshev: max error around 1.2e-9, f(x) = 0.999999986x-0.166666367x3+0.008331584x5-0.000194621x7
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Get Character value from KeyCode in JavaScript… then trim
...76]
"M", // [77]
"N", // [78]
"O", // [79]
"P", // [80]
"Q", // [81]
"R", // [82]
"S", // [83]
"T", // [84]
"U", // [85]
"V", // [86]
"W", // [87]
"X", // [88]
"Y", // [89]
"Z", // [90]
"OS_KEY", // [91] Windows Key (Windows) or Command Key (Mac)
"", // [92]
"CONTEX...
Is Java “pass-by-reference” or “pass-by-value”?
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81 Answers
81
Active
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std::vector performance regression when enabling C++11
...cles # 3.149 GHz ( +- 0.58% ) [81.20%]
206,804,948 stalled-cycles-frontend # 77.51% frontend cycles idle ( +- 0.91% ) [81.25%]
129,078,683 stalled-cycles-backend # 48.38% backend cycles idle ( +- 1.37% ) [69.49%]
18...
CSS selector based on element text? [duplicate]
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81
Not with CSS directly, you could set CSS properties via JavaScript based on the internal conten...