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What is the difference between save and insert in Mongo DB?
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Save Vs Insert :
In your given examples, the behavior is essentially the same.
save behaves differently if it is passed with an "_id" parameter.
For save, If the document contains _id, it will upsert querying the collection on the _id field, If not, it will...
Flatten an Array of Arrays in Swift
Is there a counterpart in Swift to flatten in Scala, Xtend, Groovy, Ruby and co?
14 Answers
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How to stop app that node.js express 'npm start'
You build node.js app with express v4.x then start your app by npm start . My question is how to stop the app? Is there npm stop ?
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Which Python memory profiler is recommended? [closed]
...is:
Partition of a set of 132527 objects. Total size = 8301532 bytes.
Index Count % Size % Cumulative % Kind (class / dict of class)
0 35144 27 2140412 26 2140412 26 str
1 38397 29 1309020 16 3449432 42 tuple
2 530 0 739856 9 4189288 50 dict (no owner)
You can ...
All possible array initialization syntaxes
What are all the array initialization syntaxes that are possible with C#?
16 Answers
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Which concurrent Queue implementation should I use in Java?
... behavior.
Taking the easiest first, ArrayBlockingQueue is a queue of a fixed size. So if you set the size at 10, and attempt to insert an 11th element, the insert statement will block until another thread removes an element. The fairness issue is what happens if multiple threads try to insert and ...
How to create a density plot in matplotlib?
....5]*2 + [3.5]*8 + [4.5]*3 + [5.5]*1 + [6.5]*8
density = gaussian_kde(data)
xs = np.linspace(0,8,200)
density.covariance_factor = lambda : .25
density._compute_covariance()
plt.plot(xs,density(xs))
plt.show()
I get
which is pretty close to what you are getting from R. What have I done? gaussian_...
What is the difference between Pan and Swipe in iOS?
...pe is a pan but a pan may not be a swipe, so the pan recognizes first and excludes other recognizers.
You should be able to resolve this conflict using the delegate method gestureRecognizer:shouldRecognizeSimultaneouslyWithGestureRecognizer:, or perhaps without delegation by making the pan recogniz...
Adding up BigDecimals using Streams
I have a collection of BigDecimals (in this example, a LinkedList ) that I would like to add together. Is it possible to use streams for this?
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