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Select 50 items from list at random to write to file
...
If the list is in random order, you can just take the first 50.
Otherwise, use
import random
random.sample(the_list, 50)
random.sample help text:
sample(self, population, k) method of random.Random instance
Chooses k unique random elements f...
How do I get the APK of an installed app without root access?
...read permission means you cannot obtain a listing of its contents -- so in order to access it you must know the name of the file that you will be accessing. Android's package manager will tell you the name of the stored apk for a given package.
To do this from the command line, use adb shell pm lis...
How to impose maxlength on textArea in HTML using JavaScript
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I switched the order of the alert and the value truncate - in the original order, the onkeyup would alert, causing the control to lose focus and the onblur to fire since the field had not been truncated yet.
– Galactic...
PyPy — How can it possibly beat CPython?
... of Python that can be translated by PyPy's translation framework". But in order to be translated, RPython code has to be statically typed (the types are inferred, you don't declare them, but it's still strictly one type per variable), and you can't do things like declaring/modifying functions/class...
Android: Difference between onInterceptTouchEvent and dispatchTouchEvent?
...nsumes all subsequent events
For each child view (in reverse order they were added)
If touch is relevant (inside view), child.dispatchTouchEvent()
If it is not handled by a previous, dispatch to next view
If no children handles the event, the listene...
How to determine if a point is in a 2D triangle? [closed]
...ding on wether the triangle is specified in clockwise or counter clockwise order.
– Andreas Brinck
Jan 12 '10 at 15:09
9
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Why is `std::move` named `std::move`?
...by the rest of the program (nobody else has
a reference to the rvalue in order to detect a difference).
If at the time swap was instead presented like this:
template <class T>
void
swap(T& a, T& b)
{
T tmp(cast_to_rvalue(a));
a = cast_to_rvalue(b);
b = cast_to_rvalue(t...
namedtuple and default values for optional keyword arguments
...(Node._fields)
>>> Node()
Node(val=None, left=None, right=None)
Order
In all versions of Python, if you set fewer default values than exist in the namedtuple, the defaults are applied to the rightmost parameters. This allows you to keep some arguments as required arguments.
>>>...
Difference between left join and right join in SQL Server [duplicate]
...ll
Null Null Kathmandu
Some facts
For INNER joins the order doesn't matter
For (LEFT, RIGHT or FULL) OUTER joins,the order matter
Find More at w3schools
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Draw a perfect circle from user's touch
...emove that limitation. Please note you'll need to use a circular buffer in order to detect a full shape:
Clockwise and counterclockwise
In order to support both modes you will need to use the circular buffer from the previous enhancement and search in both directions:
Draw an ellipse
You ha...