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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 do you unit test a Celery task?
...import current_app
def send_task(name, args=(), kwargs={}, **opts):
# https://github.com/celery/celery/issues/581
task = current_app.tasks[name]
return task.apply(args, kwargs, **opts)
current_app.send_task = send_task
...
Best introduction to C++ template metaprogramming? [closed]
...
I believe its this: www10.informatik.uni-erlangen.de/~pflaum/pflaum/ProSeminar/…
– 0fnt
Jan 30 '13 at 14:12
1
...
So, JSONP or CORS? [closed]
...at CORS is "much more friendly to the client and easier to implement." See https://gist.github.com/3131951 . jQuery abstracts the details of JsonP, and CORS can actually be somewhat tricky to implment on your server-side depending on what technology you're using.
I recently developed a web app, u...
Left Align Cells in UICollectionView
...ere there are multiple cells of differing widths on a line. According to:
https://developer.apple.com/library/content/documentation/WindowsViews/Conceptual/CollectionViewPGforIOS/UsingtheFlowLayout/UsingtheFlowLayout.html
...
How can I center a div within another div? [duplicate]
...ys to center things with CSS when W3Schools does it so nicely here: http://www.w3schools.com/css/css_align.asp but the basic idea is that for block level elements you simply specify the desired width and set the left and right margins to auto.
.center {
margin-left: auto;
margin-right: auto;...
What are the most-used vim commands/keypresses?
...
http://www.viemu.com/a_vi_vim_graphical_cheat_sheet_tutorial.html
This is the greatest thing ever for learning VIM.
share
|
impro...
Can't append element
... JavaScript file using the jQuery function getScript
$.getScript('http://www.whatever.com/shareprice/shareprice.js', function() {
Display.sharePrice();
});
Now the external script will be called, and if it cannot be loaded it will gracefully degrade.
...
Why is @autoreleasepool still needed with ARC?
... 10000 each time round the outer for-loop.
Update:
Also see this answer - https://stackoverflow.com/a/7950636/1068248 - for why @autoreleasepool is nothing to do with ARC.
Update:
I took a look into the internals of what's going on here and wrote it up on my blog. If you take a look there then you...
How do I turn a C# object into a JSON string in .NET?
...is answer became inappropriate. Take a look at willsteel's answer. Source: https://msdn.microsoft.com/en-us/library/system.web.script.serialization.javascriptserializer.aspx.
– rzelek
Feb 1 '16 at 15:12
...