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...数组作为优先队列)
图G(V,E), V为顶点集, E为边集
O(|V|^2)
O(|V|^2)
O(|V|)
Bellman-Ford最短路径算法
图G(V,E), V为顶点集, E为边集
O(|V||E|)
O(|V||E|)
O(|V|)
排序算法(来源)
算法
数据结构
时间复杂度
...
Get first day of week in SQL Server
... some sensible logic built in to round up or down:
SELECT DATEDIFF(YEAR, '2010-01-01', '2011-12-31');
SELECT DATEDIFF(YEAR, '2010-12-31', '2011-01-01');
To answer how to get a Sunday:
If you want a Sunday, then pick a base date that's not a Monday but rather a Sunday. For example:
DECLARE @dt D...
How to sort an array by a date property
...te) - new Date(a.date);
});
More Generic Answer
array.sort(function(o1,o2){
if (sort_o1_before_o2) return -1;
else if(sort_o1_after_o2) return 1;
else return 0;
});
Or more tersely:
array.sort(function(o1,o2){
return sort_o1_before_o2 ? -1 : sort_o1_after_o2 ?...
How do I override nested NPM dependency versions?
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243
You can use npm shrinkwrap functionality, in order to override any dependency or sub-dependenc...
byte + byte = int… why?
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229
The third line of your code snippet:
byte z = x + y;
actually means
byte z = (int) x + (in...
Access an arbitrary element in a dictionary in Python
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612
On Python 3, non-destructively and iteratively:
next(iter(mydict.values()))
On Python 2, non-...
What is the difference between precision and scale?
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205
Precision 4, scale 2: 99.99
Precision 10, scale 0: 9999999999
Precision 8, scale 3: 99999.99...
How to get indices of a sorted array in Python
...
>>> import numpy
>>> numpy.argsort(myList)
array([0, 1, 2, 4, 3])
http://docs.scipy.org/doc/numpy/reference/generated/numpy.argsort.html
This returns the arguments that would sort the array or list.
sha...
Add st, nd, rd and th (ordinal) suffix to a number
...
22 Answers
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