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How do I print debug messages in the Google Chrome JavaScript Console?
....log || function(){};
console.warn = console.warn || function(){};
console.error = console.error || function(){};
console.info = console.info || function(){};
Then, use any of the following:
console.log(...);
console.error(...);
console.info(...);
console.warn(...);
These functions will log dif...
How do I tell if a regular file does not exist in Bash?
...
– gniourf_gniourf
Jun 29 '13 at 10:05
@gniourf_gniourf: Yes, but the bash built-in [ command behaves very similarly t...
C++使用OLE/COM高速读写EXCEL的源码 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ved(TRUE); //将Workbook的保存状态设置为已保存，即不让系统提示是否人工保存
book.Close(covOptional,covOptional,covOptional);//关闭workbook对象
books.Close();
sheet.ReleaseDispatch();//释放sheet对象
sheets.ReleaseDispatch(); //释放sheets对象
...
do { … } while (0) — what is it good for? [duplicate]
...
#define FOO(x) foo(x); bar(x)
if (condition)
FOO(x);
else // syntax error here
...;
Even using braces doesn't help:
#define FOO(x) { foo(x); bar(x); }
Using this in an if statement would require that you omit the semicolon, which is counterintuitive:
if (condition)
FOO(x)
else
...
Getting only response header from HTTP POST using curl
... option is however a better
way to store cookies.
and
-S, --show-error
When used with -s, --silent, it makes curl show an error message if it fails.
and
-L/--location
(HTTP/HTTPS) If the server reports that the requested page has moved to a different location (indicated wi...
libevent对比libev的基准测试 - C/C++ - 清泛网 - 专注C/C++及内核技术
...机超时。这样做是为了反映网络服务器通常需要维护每个连接的空闲超时的现实条件。这些空闲超时将在活动中重置。这是通过在设置期间设置随机 10 到 11 秒超时来实现的，并在每次客户端接收数据时删除/重新添加事件观察器...
内存调试技巧：C 语言最大难点揭秘 - C/C++ - 清泛网 - 专注C/C++及内核技术
...能是内存泄漏。其他资源（如信号量、网络句柄、数据库连接等）同样值得考虑。
内存错误分配
错误分配的管理不是很困难。下面是一个示例（请参见清单 3）：
清单 3. 未初始化的指针
void f2(int datum)
{
int *p2;
...
How to calculate the SVG Path for an arc (of a circle)
...of a path with many components. Or maybe they did it to make sure rounding errors didn't build up along the length of a complex path.
The implementation notes are also useful for the original question, since they have more mathematical pseudocode for converting between the two parameterizations (wh...
Hash function that produces short hashes?
...tly unique...
I'm no expert, so please correct this if it has any glaring errors (in Python again like the accepted answer):
import base64
import hashlib
import uuid
unique_id = uuid.uuid4()
# unique_id = UUID('8da617a7-0bd6-4cce-ae49-5d31f2a5a35f')
hash = hashlib.sha1(str(unique_id).encode("UTF...
How to make a SIMPLE C++ Makefile
...
As far as I can tell, that error message only comes up if you have spaces. Make sure that you don't have any lines starting with spaces (space + tab will give that error). That's the only thing I can think of..
– Brendan Long
...