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How can I view the source code for a function?
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"Non-visible functions are asterisked" means the function is not exported from its package's namespace. You can still view its source code via the ::: function (i.e. stats:::t.ts), or by using getAnywhere(). getAnywhere() is useful because you don't have to know which package the function came fr...
What is the optimal length for an email address in a database?
...ed in RFC3696 Errata ID 1690.
I got the original part of this information from here
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How to prevent ENTER keypress to submit a web form?
How do you prevent an ENTER key press from submitting a form in a web-based application?
29 Answers
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Get the latest record from mongodb collection
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Yet another way of getting the last item from a MongoDB Collection (don't mind about the examples):
> db.collection.find().sort({'_id':-1}).limit(1)
Normal Projection
> db.Sports.find()
{ "_id" : ObjectId("5bfb5f82dea65504b456ab12"), "Type" : "NFL", "Head"...
Setting DIV width and height in JavaScript
...omized.
This technique follows the rule of separating your content (HTML) from your behavior (JavaScript), and your presentation (CSS).
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To underscore or to not to underscore, that is the question
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I'm using underscores. It is easier to distinguish them from the arguments and local variables.
– Rinat Abdullin
Jan 16 '09 at 19:12
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Circle-Rectangle collision detection (intersection)
... implement too: one way would be to check if the foot of the perpendicular from P to the line is close enough and between the endpoints, and check the endpoints otherwise.
The cool thing is that the same idea works not just for rectangles but for the intersection of a circle with any simple polygon...
How can I force division to be floating point? Division keeps rounding down to 0?
...n Python 3, it produces a float. We can get the new behaviour by importing from __future__.
>>> from __future__ import division
>>> a = 4
>>> b = 6
>>> c = a / b
>>> c
0.66666666666666663
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Android: Bitmaps loaded from gallery are rotated in ImageView
When I load an image from the media gallery into a Bitmap, everything is working fine, except that pictures that were shot with the camera while holding the phone vertically, are rotated so that I always get a horizontal picture even though it appears vertical in the gallery.
Why is that and how can...
What is a monad?
...nctions at the top level.
But how does the language prevent pure functions from executing impure functions? This is due to the lazy nature of Haskell. A function is only executed if its output is consumed by some other function. But there is no way to consume an IO value except to assign it to main....