大约有 5,229 项符合查询结果（耗时：0.0305秒） [XML]
Create list of single item repeated N times
...ols.repeat(0, 10)', 'import itertools', number = 1000000)
0.37095273281943264
>>> timeit.timeit('[0] * 10', 'import itertools', number = 1000000)
0.5577236771712819
But wait - it's not a fair test...
>>> itertools.repeat(0, 10)
repeat(0, 10) # Not a list!!!
The function itert...
Purpose of Unions in C and C++
...eader files that do this exact thing. For example I've seen it in old (pre-64-bit) versions of <time.h> on both Windows and Unix. Dismissing it as "not valid" and "undefined" isn't really sufficient if I'm going to be called upon to understand code that works in this exact way.
...
ggplot with 2 y axes on each side and different scales
...
64
Amazing how unquestioningly words like "flawed" and "right way" are thrown about as if they weren't based on a theory that is itself actual...
Where in memory are my variables stored in C?
...MORY MAP FOR ABOVE: text data bss dec hex filename 7264 1688 1040 9992 2708 a.exe MEMORY MAP FOR 2: text data bss dec hex filename 7280 1688 1040 10008 2718 a.exe MEMORY MAP FOR 3 : text data bss dec hex filenam...
Golang: How to pad a number with zeros when printing?
...lled maxVal in the following example):
myWidth := 1 + int(math.Log10(float64(maxVal)))
fmt.Printf("%*d", myWidth, nextVal)
Last, if you don't want to print to stdout but return a String, use Sprintf also from fmt package with the same parameters:
s := fmt.Sprintf("%06d", 12) // returns '000012' ...
What is a reasonable order of Java modifiers (abstract, final, public, static, etc.)?
... : private
4 : protected
8 : static
16 : final
32 : synchronized
64 : volatile
128 : transient
256 : native
512 : interface
1024 : abstract
2048 : strictfp
share
|
improve this answe...
What's the difference between String(value) vs value.toString()
...
Dagg NabbitDagg Nabbit
64.7k1717 gold badges9898 silver badges135135 bronze badges
a...
What is the Scala annotation to ensure a tail recursive function is optimized?
...\Scala\tests>scala
Welcome to Scala version 2.8.0.RC5 (Java HotSpot(TM) 64-Bit Server VM, Java 1.6.0_18).
Type in expressions to have them evaluated.
Type :help for more information.
scala> import scala.annotation.tailrec
import scala.annotation.tailrec
scala> class Tails {
| @tailre...
Custom CSS Scrollbar for Firefox
...
Firefox 64 adds support for the spec draft CSS Scrollbars Module Level 1, which adds two new properties of scrollbar-width and scrollbar-color which give some control over how scrollbars are displayed.
You can set scrollbar-color to...
How to enumerate an enum with String type?
...atingBitPattern: $0), T.self) }
case 8: cast = { unsafeBitCast(UInt64($0), T.self) }
default: fatalError("cannot be here")
}
var i = 0
return GeneratorOf {
let next = cast(i)
return next.hashValue == i++ ? next : nil
}
}
The underlying idea is:
Me...