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How to create GUID / UUID?
...e several common pitfalls:
Invalid id format (UUIDs must be of the form "xxxxxxxx-xxxx-Mxxx-Nxxx-xxxxxxxxxxxx", where x is one of [0-9, a-f] M is one of [1-5], and N is [8, 9, a, or b]
Use of a low-quality source of randomness (such as Math.random)
Thus, developers writing code for production en...
File content into unix variable with newlines
...to IFS (Internal Field Separator) variable which contains newline.
$ cat xx1
1
2
$ A=`cat xx1`
$ echo $A
1 2
$ echo "|$IFS|"
|
|
A workaround is to reset IFS to not contain the newline, temporarily:
$ IFSBAK=$IFS
$ IFS=" "
$ A=`cat xx1` # Can use $() as well
$ echo $A
1
2
$ IFS=$IFSBAK...
How can I exclude one word with grep?
...or --invert-match) option of grep as:
grep -v "unwanted_word" file | grep XXXXXXXX
grep -v "unwanted_word" file will filter the lines that have the unwanted_word and grep XXXXXXXX will list only lines with pattern XXXXXXXX.
EDIT:
From your comment it looks like you want to list all lines withou...
What is the boundary in multipart/form-data?
...ltipart/form-data?
Using the boundary, similar to &.
For example:
--XXX
Content-Disposition: form-data; name="name"
John
--XXX
Content-Disposition: form-data; name="age"
12
--XXX--
In that case, the boundary value is XXX. You specify it in the Content-Type header so that the server knows ...
VC DDE（Dynamic Data Exchange）与EXCEL连接 - C/C++ - 清泛网 - 专注C/C++及内核技术
...turn!=DMLERR_NO_ERROR)
{
printf("DDE Initialization Failed: 0xx\n", iReturn);
Sleep(1500);
return 0;
}
//Start DDE Server and wait for it to become idle.
HINSTANCE hRet = ShellExecute(0, "open", szTopic, 0, 0, SW_SHOWNORMAL);
if ((int)hRet < 33)
...
Xcode build failure “Undefined symbols for architecture x86_64”
...
Undefined symbols for architecture x86_64: "_OBJC_CLASS_$_xxx",
referenced from:
objc-class-ref in yyy.o
This generally means, you are calling "xxx" (it may be a framework or class) from the class "yyy". The compiler can not locate the "xxx" so this error occurs.
You n...
Mysql adding user for remote access
...ons on all DB's as such . See below:
my.cnf (my.ini on windows)
#Replace xxx with your IP Address
bind-address = xxx.xxx.xxx.xxx
then
CREATE USER 'myuser'@'localhost' IDENTIFIED BY 'mypass';
CREATE USER 'myuser'@'%' IDENTIFIED BY 'mypass';
Then
GRANT ALL ON *.* TO 'myuser'@'localhost...
Error: Tablespace for table xxx exists. Please DISCARD the tablespace before IMPORT
I am fairly new to MySQL and I am getting a pretty interesting error on which I cannot find any help via google and the stackoverflow search.
...
curl : (1) Protocol https not supported or disabled in libcurl
...ote to the second worked for me, below is the sample curl:
curl -X PUT -u xxx:xxx -T test.txt "https://test.com/test/test.txt"
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windbg 备忘 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...
~ (index) r 寄存器，不指定index操作当前线程
注释：$$ xxx; 之间被注释
* xxx;xxx 分号后面被注释
取别名： as v version; v，用户别名
$u0 ~ $u9 固定别名，自动定义别名
al 查看所有别名
...