大约有 5,475 项符合查询结果（耗时：0.0145秒） [XML]
How does this JavaScript/jQuery syntax work: (function( window, undefined ) { })(window)?
...
Tested with 1000000 iterations. This kind of localization had no effect in performance. Not even a single millisecond in 1000000 iterations. This is simply useless.
...
Why can I initialize a List like an array in C#?
...s:
var grades = new Dictionary<string, int>
{
{ "Suzy", 100 },
{ "David", 98 },
{ "Karen", 73 }
};
Is roughly identical to:
var temp = new Dictionary<string, int>();
temp.Add("Suzy", 100);
temp.Add("David", 98);
temp.Add("Karen", 73);
var grades = temp...
How many constructor arguments is too many?
...ings in their head at once; they can only remember four (Susan Weinschenk, 100 Things Every Designer Needs to Know about People, 48). Even so, I consider four to be something of a high earth orbit. But that's because my thinking has been altered by Bob Martin.
In Clean Code, Uncle Bob argues for th...
jQuery animate backgroundColor
...: [0, 139, 139],
darkgrey: [169, 169, 169],
darkgreen: [0, 100, 0],
darkkhaki: [189, 183, 107],
darkmagenta: [139, 0, 139],
darkolivegreen: [85, 107, 47],
darkorange: [255, 140, 0],
darkorchid: [153, 50, 204],
darkred: [139, 0, 0],
...
How to return result of a SELECT inside a function in PostgreSQL?
... -- column alias only visible inside
, (count(*) * 100) / _max_tokens -- I added brackets
FROM (
SELECT t.txt
FROM token t
WHERE t.chartype = 'ALPHABETIC'
LIMIT _max_tokens
) t
GROUP BY t.txt
ORDER BY cnt DESC; ...
switch / pattern matching idea
...tPrice (v : Vehicle) =
match v with
| :? Motorcycle as bike -> 100 + bike.Cylinders * 10
| :? Bicycle -> 30
| :? Car as car when car.EngineType = Diesel -> 220 + car.Doors * 20
| :? Car as car when car.EngineType = Gasoline -> 200 + car.Doors * 20
| _ -> failw...
The SQL OVER() clause - when and why is it useful?
..., i.e. like this:
SELECT
orig.[Partition],
orig.Value,
orig.Value * 100.0 / agg.TotalValue AS ValuePercent
FROM OriginalRowset orig
INNER JOIN (
SELECT
[Partition],
SUM(Value) AS TotalValue
FROM OriginalRowset
GROUP BY [Partition]
) agg ON orig.[Partition] = agg.[P...
GroupBy pandas DataFrame and select most common value
...pd.Series.mode)
5.56 ms ± 343 µs per loop (mean ± std. dev. of 7 runs, 100 loops each)
2.76 ms ± 387 µs per loop (mean ± std. dev. of 7 runs, 100 loops each)
Dealing with Multiple Modes
Series.mode also does a good job when there are multiple modes:
source2 = source.append(
pd.Serie...
How to map calculated properties with JPA and Hibernate
...n this article:
@Formula(
"round(" +
" (interestRate::numeric / 100) * " +
" cents * " +
" date_part('month', age(now(), createdOn)" +
") " +
"/ 12) " +
"/ 100::numeric")
private double interestDollars;
...
Return array in a function
...on plain C arrays and many other types of collection, for example
int arr[100];
int *foo = fillarr(arr, arr+100);
Which now looks an awful lot like the plain pointer examples given elsewhere in this question.
share
...