大约有 47,000 项符合查询结果（耗时：0.1117秒） [XML]
Is gcc std::unordered_map implementation slow? If so - why?
...gcc-4.7 is broken (or my installation, which is an installation of gcc-4.7.0 on Ubuntu - and another installation which is gcc 4.7.1 on debian testing).
I will submit a bug report.. until then: DO NOT use std::unordered_map with gcc 4.7!
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Checkboxes in web pages – how to make them bigger?
...r.
input[type='checkbox'] {
-webkit-appearance:none;
width:30px;
height:30px;
background:white;
border-radius:5px;
border:2px solid #555;
}
input[type='checkbox']:checked {
background: #abd;
}
<input type="checkbox" />
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Multiple INSERT statements vs. single INSERT with multiple VALUES
I'm running a performance comparison between using 1000 INSERT statements:
4 Answers
4...
How do you generate dynamic (parameterized) unit tests in python?
... self.assertEqual(a,b)
Which will generate the tests:
test_sequence_0_foo (__main__.TestSequence) ... ok
test_sequence_1_bar (__main__.TestSequence) ... FAIL
test_sequence_2_lee (__main__.TestSequence) ... ok
======================================================================
FAIL: test_s...
how do I make a single legend for many subplots with matplotlib?
... This should be the top answer.
– naught101
Dec 4 '17 at 7:28
1
This is indeed a much...
Two statements next to curly brace in an equation
...cument}
\begin{equation}
f(x)=\begin{cases}
1, & \text{if $x<0$}.\\
0, & \text{otherwise}.
\end{cases}
\end{equation}
\end{document}
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How do I reverse a C++ vector?
...{
std::vector<int> a;
std::reverse(a.begin(), a.end());
return 0;
}
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How do I retrieve the number of columns in a Pandas data frame?
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edited Nov 30 '13 at 7:22
answered Nov 30 '13 at 7:11
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Is “argv[0] = name-of-executable” an accepted standard or just a common convention?
When passing argument to main() in a C or C++ application, will argv[0] always be the name of the executable? Or is this just a common convention and not guaranteed to be true 100% of the time?
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Adjust UILabel height to text
...e just put this in a playground and it works for me.
Updated for Swift 4.0
import UIKit
func heightForView(text:String, font:UIFont, width:CGFloat) -> CGFloat{
let label:UILabel = UILabel(frame: CGRectMake(0, 0, width, CGFloat.greatestFiniteMagnitude))
label.numberOfLines = 0
lab...