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Rails: convert UTC DateTime to another time zone
...use @date.to_time.to_datetime
> @date
=> Tue, 02 Sep 2014 23:59:59 +0000
> @date.class
=> DateTime
> @date.to_time
=> 2014-09-02 12:59:59 -1100
> @date.to_time.to_datetime
=> Tue, 02 Sep 2014 12:59:59 -1100
...
DateTime.ToString(“MM/dd/yyyy HH:mm:ss.fff”) resulted in something like “09/14/2013 07.20.31.371”
...:
DateTime d = DateTime.Now;
string str = String.Format("{0:00}/{1:00}/{2:0000} {3:00}:{4:00}:{5:00}.{6:000}", d.Month, d.Day, d.Year, d.Hour, d.Minute, d.Second, d.Millisecond);
// I got this result: "02/23/2015 16:42:38.234"
...
What is the difference between the GNU Makefile variable assignments =, ?=, := and +=?
... -I)
something:
touch $(WHEN).flag
# If this is executed on 00:00:00:000, $(WHEN) will have a different value!
something-else-later: something
test -f $(WHEN).flag || echo "Boo!"
Simply expanded variable
VARIABLE := value
VARIABLE ::= value
Variables defined with ‘:=’ or ‘::=’ a...
Escape double quotes in a string
...characters that you write using the backslash:
Backslash with a number:
\000 null
\010 backspace
\011 horizontal tab
\012 new line
\015 carriage return
\032 substitute
\042 double quote
\047 single quote
\134 backslash
\140 grave accent
Backslash with othe character
\a Bell (alert)
\b Backspac...
Is BCrypt a good hashing algorithm to use in C#? Where can I find it? [closed]
...ven to be implemented without error. The cost of this can easily reach $20,000 or higher. I recall this when I was doing research on OpenSSL and read where they stated they haven't completed the entire verification process but if you need fully verified that they can point you down the right path fo...
Replacing NAs with latest non-NA value
...'a',NA,NA,NA,NA,NA,NA,NA,NA,'b','c','d',NA,NA,NA,NA,NA,'e')
xx = rep(x, 1000000)
system.time({ yzoo = na.locf(xx,na.rm=F)})
## user system elapsed
## 2.754 0.667 3.406
system.time({ yrep = repeat.before(xx)})
## user system elapsed
## 0.597 0.199 0.793
Edit
As this b...
二维码的生成细节及原理 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...数字分成三组: 012 345 67
2. 把他们转成二进制: 012 转成 0000001100； 345 转成 0101011001； 67 转成 1000011。
3. 把这三个二进制串起来: 0000001100 0101011001 1000011
4. 把数字的个数转成二进制 (version 1-H是10 bits ): 8个数字的二进制是 000000100...
Creating multiline strings in JavaScript
...ing value of a string literal is to use an escape sequence such as \n or \u000A."
– some
Sep 25 '12 at 2:28
17
...
JavaScript data grid for millions of rows [closed]
...nce in performance between working with a grid with 10 rows versus a 100’000 rows."
Some highlights:
Adaptive virtual scrolling (handle hundreds of thousands of rows)
Extremely fast rendering speed
Background post-rendering for richer cells
Configurable & customizable
Full keyboard navigati...
How to get a complete list of ticker symbols from Yahoo Finance? [closed]
... }
}
}
It gave me a list of about 75,000 securities in about 4 mins.
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