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What is the email subject length limit?
How many characters are allowed to be in the subject line of Internet email?
I had a scan of The RFC for email but could not see specifically how long it was allowed to be.
I have a colleague that wants to programmatically validate for it.
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互联网运营人员必备的12款工具 - 资讯 - 清泛网 - 专注C/C++及内核技术
...人员可以通过它快速了解网站的各项运营数据、包括PV、IP、独立访客、来访次数、搜索关键词、地域分布、用户属性等多项统计指标，这样可以一目了然地了解网站的各项访问数据，运营人员可以根据统计数据及时调整页面内...
Realistic usage of the C99 'restrict' keyword?
...ons could be saved, as mentioned by supercat.
Consider for example:
void f(char *restrict p1, char *restrict p2) {
for (int i = 0; i < 50; i++) {
p1[i] = 4;
p2[i] = 9;
}
}
Because of restrict, a smart compiler (or human), could optimize that to:
memset(p1, 4, 50);
memset(...
How do I check if an integer is even or odd? [closed]
...tring();
if (String.IsNullOrEmpty(foo))
return Evenness.Unknown;
char bar = foo[foo.Length - 1];
switch (bar)
{
case '0':
case '2':
case '4':
case '6':
case '8':
return Evenness.Even;
case '1':
case '3':
case '5':
case '7':
case...
LEN function not including trailing spaces in SQL Server
..."returns the number of bytes used to represent any expression".
Example:
SELECT
ID,
TestField,
LEN(TestField) As LenOfTestField, -- Does not include trailing spaces
DATALENGTH(TestField) As DataLengthOfTestField -- Shows the true length of data, including trailing...
Splitting String with delimiter
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Oh, and be careful if you're splitting on certain characters like a pipe |. You will need to escape the char stackoverflow.com/questions/3842537/…
– Snekse
Dec 23 '15 at 17:19
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UINavigationController “back button” custom text?
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You can set the text in the Interface Builder:
Select the navigation item of the ViewController that the back button would return to:
In the utilities panel attribute inspector, enter your label for the Back Button:
I would prefer this approach over setting the titl...
Colorized grep — viewing the entire file with highlighted matches
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Also works with piping (reading from stding) using -: … | less -p pattern -
– phk
Dec 13 '17 at 15:45
3
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How do you determine what technology a website is built on? [closed]
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I use 1 plug in for Firefox that gives me the IP and country for the hosting website and it's Web Server name called Domain Details, and for javascript framework I use WTFramework
I still need to wonder what script it was written on, but it is a start :)
Hope it helps....
scp with port number specified
...s then standard and copy files between files like this:
scp -P 1234 user@[ip address or host name]:/var/www/mywebsite/dumps/* /var/www/myNewPathOnCurrentLocalMachine
This is only for occasional use, if it repeats itself based on a schedule you should use rsync and cron job to do it.
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