大约有 16,000 项符合查询结果（耗时：0.0293秒） [XML]
How to call a shell script from python code?
...eprecated) or the whole subprocess module, but this approach
import os
os.system(command)
is one of the easiest.
share
|
improve this answer
|
follow
|
...
Different floating point result with optimization enabled - compiler bug?
...
I think this is the answer. The constant 4.55 gets converted to 4.54999999999999 which is the closest binary representation in 64 bits; multiply by 10 and round again to 64 bits and you get 45.5. If you skip the rounding step by keeping it in an 80-bit register you end up wit...
How to programmatically cause a core dump in C/C++
...n use setrlimit(RLIMIT_CORE, &core_limits); available via #include <sys/resource.h>. You create a struct of type rlimit and then set the rlim_cur and rlim_max members.
– Brent Writes Code
May 14 at 21:43
...
Is the Scala 2.8 collections library a case of “the longest suicide note in history”? [closed]
...then further generalized by only requiring that a function exists that can convert the result to whatever data structure the user wants:
map :: IterableLike i ⇒ (a → b) → i → ([b] → c) → c
I admit that the syntax is a bit clunkier, but the semantics are the same. Basically, it starts ...
Which are more performant, CTE or temporary tables?
...en with two CTEs in SQL server. It was taking 28sec.
I spent two minutes converting them to temp tables and the query took 3 seconds
I added an index to the temp table on the field it was being joined on and got it down to 2 seconds
Three minutes of work and now its running 12x faster all by rem...
Case objects vs Enumerations in Scala
...ceVal(character: Char, pointValue: Int) extends super.Val()
implicit def convert(value: Value) = value.asInstanceOf[ChessPieceVal]
}
The following items from the enumeration definition are not available (happens to be identical to the list for directly using the Java Enum):
3.1 - It would be...
Difference between string and char[] types in C++
... and certain functions may only accept a string as input, requiring you to convert the array to a string. It's better to use strings, they were made so that you don't have to use arrays. If arrays were objectively better we wouldn't have strings.
...
In Scala how do I remove duplicates from a list?
...has a .distinct method.
So calling dirty.distinct is now possible without converting to a Set or Seq.
share
|
improve this answer
|
follow
|
...
“Invalid JSON primitive” in Ajax processing
...
Just a guess what does the variable json contain after
var json = Sys.Serialization.JavaScriptSerializer.serialize(obj);?
If it is a valid json object like {'foo':'foovalue', 'bar':'barvalue'} then jQuery might not send it as json data but instead serialize it to foor=foovalue&bar=bar...
Is there a way to perform “if” in python's lambda
...
Probably the worst python line I've written so far:
f = lambda x: sys.stdout.write(["2\n",][2*(x==2)-2])
If x == 2 you print,
if x != 2 you raise.
share
|
improve this answer
...