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Is there a way to iterate over a dictionary?
....1+) appears to optimise loop iteration, so the loop approach is now about 20% faster than the block approach, at least for the simple case above.
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Convert two lists into a dictionary
...here that dict(zip(... does indeed run faster for larger datasets by about 20%.
>>> min(timeit.repeat(lambda: {k: v for k, v in zip(l1, l2)}))
9.698965263989521
>>> min(timeit.repeat(lambda: dict(zip(l1, l2))))
7.9965161079890095
...
Including another class in SCSS
...lly for class b
width: 100px;
&:hover{
color: darken(#FFFFFF, 20%);
}
}
More about Attribute Selectors on w3Schools
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How to increase the gap between text and underlining in CSS
...= #0054a6;
a {
color: $blue;
@include fake-underline(lighten($blue,20%));
}
a.thick {
color: $blue;
@include fake-underline(lighten($blue,40%), 86%, 99%);
}
Update 2: Descenders Tip
If you have a solid background color, try adding a thin text-stroke or text-shadow in the same colo...
WAMP/XAMPP is responding very slow over localhost
...
It reduced the response time to 20% on windows 8.1. Thanks for the answer. Same question as wowpartick's
– Ejaz
Feb 12 '15 at 17:50
...
Hash function that produces short hashes?
... bits), CRC-32 or Adler-32.
CRC-32 is slower than Adler32 by a factor of 20% - 100%.
Fletcher-32 is slightly more reliable than Adler-32. It has a lower computational cost than the Adler checksum: Fletcher vs Adler comparison.
A sample program with a few Fletcher implementations is given below:...
PHP: Move associative array element to beginning of array
... it is 3x faster and takes half as much memory. I also found that it takes 20% more time than moving the same element to the end of the array.
– Mark Eirich
Jul 1 '12 at 22:17
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Is optimisation level -O3 dangerous in g++?
...s of the code that takes more execution time and that alone can give up to 20% more speed.
– CoffeDeveloper
Apr 5 '15 at 15:45
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What columns generally make good indexes?
...olumn.
They will not be useful if:
You are selecting a large % (>10-20%) of the rows in the table
The additional space usage is an issue
You want to maximize insert performance. Every index on a table reduces insert and update performance because they must be updated each time the data chang...
原子vector的一种实现源码(atomic-vector) - C/C++ - 清泛网 - 专注C/C++及内核技术
...原版链接
源码依赖Facebook的folly库，稍加适配改成了独立运行的版本，代码比较简单，实现分配好空间，然后对元素进行原子交换，扩容采用链表的形式，代码可直接运行。
测试代码：
HPHP::AtomicVector<float> v_atom(2, 0.f);
void a...