大约有 25,000 项符合查询结果（耗时：0.0362秒） [XML]
How to use redis PUBLISH/SUBSCRIBE with nodejs to notify clients when data values change?
...
OLD only use a reference
Dependencies
uses express, socket.io, node_redis and last but not least the sample code from media fire.
Install node.js+npm(as non root)
First you should(if you have not done this yet) install node.js+npm in 30 seconds (the right way because you should NOT run npm...
What are the precise rules for when you can omit parenthesis, dots, braces, = (functions), etc.?
...an use infix with multiple parameters:
string substring (start, end) map (_ toInt) mkString ("<", ", ", ">")
Curried functions are hard to use with infix notation. The folding functions are a clear example of that:
(0 /: list) ((cnt, string) => cnt + string.size)
(list foldLeft 0) ((cnt...
How to save a dictionary to a file?
... convenient, but is good for performance. Protocol 0 is a text format.
In order to save collections of Python there is the shelve module.
share
|
improve this answer
|
foll...
Apache Kafka vs Apache Storm
...
Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
...
C libcurl get output into a string
...
Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
...
Maximum length for MD5 input/output
... In the unlikely event that b is greater than 2^64, then only
the low-order 64 bits of b are used.
The hash is always 128 bits. If you encode it as a hexdecimal string you can encode 4 bits per character, giving 32 characters.
MD5 is not encryption. You cannot in general "decrypt" an MD5 has...
How to add an object to an array
...It's also a good practice to freeze the object as well as the new array in order to avoid unintended mutations. A frozen object is neither mutable nor extensible (shallowly).
Applying those points and to answer your two questions, you could define a function like this:
function appendObjTo(that...
Delete duplicate rows from small table
... ROW_NUMBER() OVER (partition BY column1, column2, column3 ORDER BY id) AS rnum
FROM tablename) t
WHERE t.rnum > 1);
provided by Postgres wiki:
https://wiki.postgresql.org/wiki/Deleting_duplicates
...
Python Git Module experiences? [closed]
... replicate the above I would do this instead:
import sh
git = sh.git.bake(_cwd='/home/me/repodir')
print git.status()
# checkout and track a remote branch
print git.checkout('-b', 'somebranch')
# add a file
print git.add('somefile')
# commit
print git.commit(m='my commit message')
# now we are one ...
How to get the first element of the List or Set? [duplicate]
...
"If the stream has no encounter order, then any element may be returned"(docs.oracle.com/javase/8/docs/api/java/util/stream/Stream.html)
– CrazyGreenHand
Aug 26 at 14:58
...