大约有 30,000 项符合查询结果（耗时：0.0289秒） [XML]
Linux Shell中 if else及大于、小于、等于逻辑表达式写法 - C/C++ - 清泛网...
....tgz"
cd /data/nginx/logs
if [ -f "$FILE" ];then
echo "OK"
else
echo "error $FILE" > error.log
mail -s "$FILE backup fail" test@tsingfun.com <error.log
fi
2、清除相关文件，并按时间段记录日志
#!/bin/sh
# 清除相关文件，并按时间段记录日志
#
DIR=/data/img_c...
使用 C++ 处理 JSON 数据交换格式 - C/C++ - 清泛网 - 专注C/C++及内核技术
...译（默认是使用 VS2003 编译器的，打开时直接按照 VS2005 提示转换即可）。
四、jsoncpp 使用详解
jsoncpp 主要包含三种类型的 class：Value、Reader、Writer。jsoncpp 中所有对象、类名都在namespace Json 中，包含 json.h 即可。
Json::Va...
OpenCV C++/Obj-C: Detecting a sheet of paper / Square Detection
... C++ code below is able to detect a sheet of paper in the image:
void find_squares(Mat& image, vector<vector<Point> >& squares)
{
// blur will enhance edge detection
Mat blurred(image);
medianBlur(image, blurred, 9);
Mat gray0(blurred.size(), CV_8U), gray;
v...
微博为什么限制140字(附短信70字限制考) - 闲聊区 - 清泛IT社区，为创新赋能！
...就注册了，之后再也没登录过。今天在人人网转发状态，提示我超过140字了，突然就好奇大家都在凑什么热闹，为什么除了网易微博，都限制140个字呢?当然也已经有过关于这个问题的解释，比如人民网上这位“并没有twitter方面...
How to sort git tags by version string order of form rc-X.Y.Z.W?
...played ref has fewer components than <N>, the command aborts with an error.
For git tag, when unspecified, defaults to %(refname:strip=2).
Update Git 2.12 (Q1 2017)
See commit c026557, commit b178464, commit 51acfa9, commit b823166, commit 109064a, commit 0c1b487, commit 9ffda48, commit ...
How to check if a Unix .tar.gz file is a valid file without uncompressing?
...the filesystem. If the tar file is corrupt, the process will abort with an error.
Example of failed tar ball test...
$ echo "this will not pass the test" > hello.tgz
$ tar -xvzf hello.tgz -O > /dev/null
gzip: stdin: not in gzip format
tar: Child returned status 1
tar: Error exit delayed from...
Find all storage devices attached to a Linux machine [closed]
...Disk /dev/xvda1: 10.7 GB, 10737418240 bytes
255 heads, 63 sectors/track, 1305 cylinders, total 20971520 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/xvda1 ...
How to sort a list of objects based on an attribute of the objects?
...u might want to do the following, then:
try: import operator
except ImportError: keyfun= lambda x: x.count # use a lambda if no operator module
else: keyfun= operator.attrgetter("count") # use operator since it's faster than lambda
ut.sort(key=keyfun, reverse=True) # sort in-place
...
Can I use Objective-C blocks as properties?
...al places use a type def
typedef void(^MyCompletionBlock)(BOOL success, NSError *error);
@property (nonatomic) MyCompletionBlock completion;
share
|
improve this answer
|
f...
Java using enum with switch statement
... ...
break;
}
}
You may find it more helpful / less error prone to write a custom valueOf implementation that takes your integer values as an argument to resolve the appropriate enum value and lets you centralize your bounds checking.
...