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What does `node --harmony` do?
...nable all the harmony features (e.g. --harmony_scoping, --harmony_proxies, etc.) From this blog post, it seems harmony enables new ECMAScript 6 features in the language. The reason your file won't run without harmony is because app.js is probably using non-backward compatible features from the new E...
How to use count and group by at the same select statement
...
If you want to order by count (sound simple but i can`t found an answer on stack of how to do that) you can do:
SELECT town, count(town) as total FROM user
GROUP BY town ORDER BY total DESC
...
PyLint “Unable to import” error - how to set PYTHONPATH?
...lint's, though I haven't used that) is:
topdir\
__init__.py
functions_etc.py
subdir\
__init__.py
other_functions.py
This is how the python interpreter is aware of the module without reference to the current directory, so if pylint is running from its own absolute path it will be abl...
Unit testing Anti-patterns catalogue
... on something specific to the development environment it was written on in order to run. The result is the test passes on development boxes, but fails when someone attempts to run it elsewhere.
The Hidden Dependency
Closely related to the local hero, a unit test that requires some existing data to...
CentOS搭建sock5代理服务器(XEN VPS ) - 更多技术 - 清泛网 - 专注C/C++及内核技术
...ar.gz
cd ss5-3.6.1
./configure
make
make install
#启动ss5服务
/etc/init.d/ss5 start
添加ss5到服务中，并随机启动
chkconfig --add ss5
chkconfig ss5 on
ss5 默认使用1080端口，并允许任何人使用。
我们可以修改 /etc/opt/ss5/ss5.conf 中的
# SHos...
How do I use a file grep comparison inside a bash if/else statement?
... was not given, the exit status is 2.
if grep --quiet MYSQL_ROLE=master /etc/aws/hosts.conf; then
echo exists
else
echo not found
fi
You may want to use a more specific regex, such as ^MYSQL_ROLE=master$, to avoid that string in comments, names that merely start with "master", etc.
This wor...
What is the correct way to start a mongod service on linux / OS X?
... don't want/need launchctl, you can just run:
mongod --config /usr/local/etc/mongod.conf
==> Summary
???? /usr/local/Cellar/mongodb/3.0.6: 17 files, 159M
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What is dynamic programming? [closed]
...t rid of the recursion all-together by evaluating the results in the right order:
cache = {}
def fibonacci(n):
cache[0] = 0
cache[1] = 1
for i in range(2, n + 1):
cache[i] = cache[i - 1] + cache[i - 2]
return cache[n]
We can even use constant space and store only the n...
Windows equivalent of the 'tail' command
...
Commands such as P, S, etc. can only be input by the user at the prompt. They cannot be passed-in to the more command. Thus, the example above does not work
– Philibert Perusse
Jul 23 '12 at 22:16
...
elasticsearch v.s. MongoDB for filtering application [closed]
...rms of which fields are used for the filtering at any moment", it could be orders of magnitude faster, especially as the datasets become larger. The difference lies in the underlying query implementations:
Elastic/Lucene use the Vector Space Model and inverted indexes for Information Retrieval, wh...