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MongoDB SELECT COUNT GROUP BY
...expression, then computes the count of documents in each distinct group.
https://docs.mongodb.com/manual/reference/operator/aggregation/sortByCount/
For example:
db.contest.aggregate([
{ $sortByCount: "$province" }
]);
...
How to check for an active Internet connection on iOS or macOS?
...you'll freeze up your app.
Swift
1) Install via CocoaPods or Carthage: https://github.com/ashleymills/Reachability.swift
2) Test reachability via closures
let reachability = Reachability()!
reachability.whenReachable = { reachability in
if reachability.connection == .wifi {
print(...
How to pass a parcelable object that contains a list of objects?
...
In my personal experience, http://www.parcelabler.com/ is an amazing site for this. You just create your class, and copy paste it into the website, and it generates a Parcelable version of your class.
I tested it with a class named "Theme" that contai...
Download Github pull request as unified diff
...patch file, just add .diff or .patch to the end of the URL, for example:
https://github.com/weppos/whois/pull/90
https://github.com/weppos/whois/pull/90.diff
https://github.com/weppos/whois/pull/90.patch
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Can you provide some examples of why it is hard to parse XML and HTML with a regex? [closed]
... HTML:
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd" [
<!ENTITY % e "href='hello'">
<!ENTITY e "<a %e;>">
]>
<title>x</TITLE>
</head>
<p id = a:b center>
<span / hello &l...
How can you profile a Python script?
...
The python wiki is a great page for profiling resources:
http://wiki.python.org/moin/PythonSpeed/PerformanceTips#Profiling_Code
as is the python docs:
http://docs.python.org/library/profile.html
as shown by Chris Lawlor cProfile is a great tool and can easily be used to print to ...
How does Trello access the user's clipboard?
... What I am missing?
Sovled thanks to VadimIvanov.
See a working example:
http://jsfiddle.net/AGEf7/
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What is “origin” in Git?
...wing command prompt:
git remote rename origin mynewalias
Take a look at http://git-scm.com/docs/git-remote for further clarifications.
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What are the best JVM settings for Eclipse? [closed]
...e settings strike back!
Eclipse Helios 3.6 and 3.6.x settings
alt text http://www.eclipse.org/home/promotions/friends-helios/helios.png
After settings for Eclipse Ganymede 3.4.x and Eclipse Galileo 3.5.x, here is an in-depth look at an "optimized" eclipse.ini settings file for Eclipse Helios 3....
Compare if two variables reference the same object in python
...eally like to have a visual feedback, that's why I sometimes just open up http://www.pythontutor.com/visualize.html#mode=edit to see how the memory is allocated and what is referencing what.
Added this awesome gif as this reply is about visualizing..
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