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mongodb count num of distinct values per field/key
...}
},
{ $unwind: "$keywords" },
{
$group: {
_id: {$toLower: '$keywords'},
count: { $sum: 1 }
}
},
{
$match: {
count: { $gte: 2 }
}
},
{ $sort : { count : -1} },
{ $limit : 100 }
]);
that give result ...
Should I URL-encode POST data?
...ould read the documentation here.
Here's the relevant information:
CURLOPT_POST
TRUE to do a regular HTTP POST.
This POST is the normal application/x-www-form-urlencoded kind, most commonly used by HTML forms.
CURLOPT_POSTFIELDS
The full data to post in a HTTP "POST" operation. To post a file, prep...
Updating MySQL primary key
I have a table user_interactions with 4 columns:
3 Answers
3
...
jumpserver-华为云免费堡垒机解决方案 - 更多技术 - 清泛网 - 专注C/C++及内核技术
jumpserver-华为云免费堡垒机解决方案一、环境CentOS 6.x x86_64 minivi etc hostsvi etc sysconfig networkservice iptables stopchkconfig iptables off关闭SELinu...一、环境
CentOS 6.x x86_64 mini
vi /etc/hosts
vi /etc/sysconfig/network
service iptables stop
chkco...
Non-alphanumeric list order from os.listdir()
...however you want. Based on what you describe,
sorted(os.listdir(whatever_directory))
Alternatively, you can use the .sort method of a list:
lst = os.listdir(whatever_directory)
lst.sort()
I think should do the trick.
Note that the order that os.listdir gets the filenames is probably complet...
How to implement an STL-style iterator and avoid common pitfalls?
... void swap(iterator& lhs, iterator& rhs); //C++11 I think
};
input_iterator : public virtual iterator {
iterator operator++(int); //postfix increment
value_type operator*() const;
pointer operator->() const;
friend bool operator==(const iterator&, const iterator&)...
What is the minimum I have to do to create an RPM file?
...ld/{RPMS,SRPMS,BUILD,SOURCES,SPECS,tmp}
cat <<EOF >~/.rpmmacros
%_topdir %(echo $HOME)/rpmbuild
%_tmppath %{_topdir}/tmp
EOF
cd ~/rpmbuild
2. create the tarball of your project
mkdir toybinprog-1.0
mkdir -p toybinprog-1.0/usr/bin
mkdir -p toybinprog-1.0/etc/toybinprog
install -m 755...
In Flux architecture, how do you manage Store lifecycle?
...cher. Moving from one pseudo-page to another would probably involve a PAGE_UPDATE action, which would trigger the invocation of initialize(). There are details to work out around retrieving data from the local cache, retrieving data from the server, optimistic rendering and XHR error states, but t...
Which characters are valid in CSS class names/selectors?
...tly at the CSS grammar.
Basically1, a name must begin with an underscore (_), a hyphen (-), or a letter(a–z), followed by any number of hyphens, underscores, letters, or numbers. There is a catch: if the first character is a hyphen, the second character must2 be a letter or underscore, and the n...
Python: avoid new line with print command [duplicate]
...thon 3. To suppress the space character as well, you can either use
from __future__ import print_function
to get access to the Python 3 print function or use sys.stdout.write().
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