大约有 23,000 项符合查询结果（耗时：0.0379秒） [XML]
How to convert a unix timestamp (seconds since epoch) to Ruby DateTime?
...).
# ~ % ruby -v
# => ruby 2.1.5p273 (2014-11-13 revision 48405) [x86_64-darwin13.0]
irb(main):038:0> Benchmark.measure do
irb(main):039:1* ["1318996912", "1318496912"].each do |s|
irb(main):040:2* DateTime.strptime(s, '%s')
irb(main):041:2> end
irb(main):042:1> end
=> #&l...
get list from pandas dataframe column
...a 1.0 1
b 2.0 2
c 3.0 3
d NaN 4
column types:
one float64
two int64
dtype: object
col_one_list:
[1.0, 2.0, 3.0, nan]
type:<class 'list'>
col_one_arr:
[ 1. 2. 3. nan]
type:<class 'numpy.ndarray'>
...
What does “%.*s” mean in printf?
...ll terminator, for example a string which is input from any stream or file based source. Which is far more often the use case I have encountered, than merely print prettines.
– Conrad B
Oct 24 '18 at 8:04
...
Best way to store date/time in mongodb
...goDB shell version: 2.4.9
connecting to: 10.0.1.223/test
Create your database by inserting items
> db.penguins.insert({"penguin": "skipper"})
> db.penguins.insert({"penguin": "kowalski"})
>
Lets make that database the one we are on now
> use penguins
switched to db penguins
Get ...
How can I remove the first line of a text file using bash/sed script?
...n't try to delete the first line but maintains a persistent (probably file-based) offset into the file A so that, next time it runs, it could seek to that offset, process the line there, and update the offset.
Then, at a quiet time (midnight?), it could do special processing of file A to delete all...
How to convert a byte array to a hex string in Java?
...
A Guava solution, for completeness:
import com.google.common.io.BaseEncoding;
...
byte[] bytes = "Hello world".getBytes(StandardCharsets.UTF_8);
final String hex = BaseEncoding.base16().lowerCase().encode(bytes);
Now hex is "48656c6c6f20776f726c64".
...
git-svn: how do I create a new svn branch via git?
...remotes/auth_bug)
The best part of it, now you can create a local branch based on your remote branch like so:
git checkout -b local/auth_bug auth_bug
Which means "check out and create local branch named auth_bug and make it follow the remote branch (last parameter) auth_bug
Test that your loca...
How can you detect the version of a browser?
...://unpkg.com/bowser@2.4.0/es5.js"></script>
*supports Edge based on Chromium
Platform.js by bestiejs - 2,250★s - Last updated Oct 30, 2018 - 5.9KB
console.log(platform);
document.write("You are using " + platform.name +
" v" + platform.version +
...
TLSF源码及算法介绍 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
... (Jul 28 2007) Herman ten Brugge <hermantenbrugge@home.nl>:
*
* - Add 64 bit support. It now runs on x86_64 and solaris64.
* - I also tested this on vxworks/32and solaris/32 and i386/32 processors.
* - Remove assembly code. I could not measure any performance difference
* on my core2 p...
Generate class from database table
... WHEN 'bigint' THEN CASE C.IS_NULLABLE
WHEN 'YES' THEN 'Int64?'
ELSE 'Int64'
END
WHEN 'binary' THEN 'Byte[]'
WHEN 'bit' THEN CASE C.IS_NULLABLE
WHEN 'YES' THEN 'bool?'
ELSE 'bool'
END
WHEN 'char' THEN 'st...