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Using OpenSSL what does “unable to write 'random state'” mean?
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Yes, if you run from php web server, the user is www-data, and you should add "export" before every openssl: shell_exec('export RANDFILE=".rnd";openssl ecparam -genkey -name secp256k1'))
– diyism
Jun 21 '13...
How to concatenate columns in a Postgres SELECT?
...catenated to NULL is NULL. If NULL values can be involved and the result shall not be NULL, use concat_ws() to concatenate any number of values (Postgres 9.1 or later):
SELECT concat_ws(', ', a, b) AS ab FROM foo;
Or concat() if you don't need separators:
SELECT concat(a, b) AS ab FROM foo;
No...
网站伪静态Rewrite重写中文路径时乱码 - 更多技术 - 清泛网 - 专注C/C++及内核技术
... 或 直接中文(浏览器自动utf编码)。
总结
最后我是使用php所以直接使用urlencode()函数直接处理了，这样使用get获取会自动解析，同时也解决了中文路径乱码问题了。
伪静态 Rewrite 重写 中文乱码
Regex - how to match everything except a particular pattern
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He failed mention it in the question, but the OP is actually using the DOS findstr command. It affords only a tiny subset of the capabilities you expect to find in a regex tool; lookahead is not among them. (I just added the findstr tag myself.)
– Alan Moor...
What does @@variable mean in Ruby?
...the classes; setting the value in an instance of one changes the value for all other instances of that class and even child classes, where a variable named @shared, with one @, would not be.
[Update]
As Phrogz mentions in the comments, it's a common idiom in Ruby to track class-level data with an ...
How do I get an ISO 8601 date on iOS?
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Use NSDateFormatter:
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
NSLocale *enUSPOSIXLocale = [NSLocale localeWithLocaleIdentifier:@"en_US_POSIX"];
[dateFormatter setLocale:enUSPOSIXLocale];
[dateFormatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ssZZZZZ"];
[dateFormatter setCale...
Shortest way to print current year in a website
...n the footer. I want to replace it with some JavaScript that will automatically update each year.
10 Answers
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How to make a DIV not wrap?
...d maintain block characteristics.*/
vertical-align: top; /*Makes sure all the divs are correctly aligned.*/
white-space: normal; /*Prevents child elements from inheriting nowrap.*/
width: 100px;
height: 100px;
background-color: red;
margin: 5px;
}
<div class=...
What to do Regular expression pattern doesn't match anywhere in string?
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Contrary to all the answers here, for what you're trying to do regex is a perfectly valid solution. This is because you are NOT trying to match balanced tags-- THAT would be impossible with regex! But you are only matching what's in one ...
Hook up Raspberry Pi via Ethernet to laptop without router? [closed]
I'm working on a balloon project with a Raspberry Pi. When we potentially recover the Raspberry Pi, it will most likely be in a rural location and I'd like to turn off the Pi at that point safely.
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