大约有 9,600 项符合查询结果（耗时：0.0146秒） [XML]
What does extern inline do?
...roduced the inline, static inline, and extern inline constructs; most pre-C99 compiler generally follow its lead.
GNU89:
inline: the function may be inlined (it's just a hint though). An out-of-line version is always emitted and externally visible. Hence you can only have such an inline defined ...
bpftrace教程【官方】 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...ftrace。
9. 分析内核实时函数栈
# bpftrace -e 'profile:hz:99 { @[kstack] = count(); }'
Attaching 1 probe...
^C
[...]
@[
filemap_map_pages+181
__handle_mm_fault+2905
handle_mm_fault+250
__do_page_fault+599
async_page_fault+69
]: 12
[...]
@[
cpuidle_enter_state+164
do_...
Pandas - Get first row value of a given column
...C')}, index=[0,2,1])
In [24]: df['bar'] = 100
In [25]: df['bar'].iloc[0] = 99
/home/unutbu/data/binky/bin/ipython:1: SettingWithCopyWarning:
A value is trying to be set on a copy of a slice from a DataFrame
See the caveats in the documentation: http://pandas.pydata.org/pandas-docs/stable/indexing....
Why aren't variable-length arrays part of the C++ standard?
... And if you don't know the size beforehand, you will write unsafe code.
C99 VLAs could provide a small benefit of being able to create small arrays without wasting space or calling constructors for unused elements, but they will introduce rather large changes to the type system (you need to be abl...
Set transparent background of an imageview on Android
...
If you add any number from 01 to 99 before the actual hash code, it will give you the transparency. Eg: Black with more transparency - #10000000 Black with less transparency - #99000000
– AnhSirk Dasarp
Feb 6 '1...
What would be C++ limitations compared C language? [closed]
...n a project I'm working on, this is what happens if you just swap gcc std=c99 for g++:
sandiego:$ g++ -g -O1 -pedantic -mfpmath=sse -DUSE_SSE2 -DUSE_XMM3 -I src/core -L /usr/lib -DARCH=elf64 -D_BSD_SOURCE -DPOSIX -D_ISOC99_SOURCE -D_POSIX_C_SOURCE=200112L -Wall -Wextra -Wwrite-strings -Wredundant...
What does the restrict keyword mean in C++?
...commends it's usage when available:
restrict keyword
! New to 1999 ANSI/ISO C standard
! Not in C++ standard yet, but supported by many C++ compilers
! A hint only, so may do nothing and still be conforming
A restrict-qualified pointer (or reference)...
! ...
In SQL, how can you “group by” in ranges?
... 9 then ' 0- 9'
when score between 10 and 19 then '10-19'
else '20-99' end as range
from scores) t
group by t.range
or
select t.range as [score range], count(*) as [number of occurrences]
from (
select user_id,
case when score >= 0 and score< 10 then '0-9'
wh...
Converting a string to int in Groovy
...e toInteger() method to convert a String to an Integer, e.g.
int value = "99".toInteger()
An alternative, which avoids using a deprecated method (see below) is
int value = "66" as Integer
If you need to check whether the String can be converted before performing the conversion, use
String nu...
What happens if I define a 0-size array in C/C++?
...
An array cannot have zero size.
ISO 9899:2011 6.7.6.2:
If the expression is a constant expression, it shall have a value greater than zero.
The above text is true both for a plain array (paragraph 1). For a VLA (variable length array), the behavior is undef...