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Why do need to use new Random() instead of just Random Randomnum?


Why do need to use new Random() instead of just Random Randomnum?

By : user3100054
Date : January 11 2021, 05:14 PM
This might help you In Java there is no implicit calling of constructors. In your example, the variable will either be non-initialized or initialized to null (such as when declaring a class field). ie:
code :
void foo() {
    Random r; // r never gets initialized
}
...
class Foo {
    Random r; // gets initialized to null
}


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Tetris Random Generator: random.choice with permutations versus random.shuffle

Tetris Random Generator: random.choice with permutations versus random.shuffle


By : Mihael Veber
Date : March 29 2020, 07:55 AM
it fixes the issue I'd say that the time to shuffle a tiny list is simply trivial, so don't worry about it. Either method should be "equally random", so there's no basis for deciding there.
But rather than muck with both lists and deques, I'd use a tile generator instead:
code :
def get_tile():
    from random import shuffle
    tiles = list("IJLOSTZ")
    while True:
        shuffle(tiles)
        for tile in tiles:
            yield tile
class PeekableQueue:
    def __init__(self, item_getter, maxpeek=50):
        self.getter = item_getter
        self.maxpeek = maxpeek
        self.b = [next(item_getter) for _ in range(maxpeek)]
        self.i = 0

    def pop(self):
        result = self.b[self.i]
        self.b[self.i] = next(self.getter)
        self.i += 1
        if self.i >= self.maxpeek:
            self.i = 0
        return result

    def peek(self, n):
        if not 0 <= n <= self.maxpeek:
            raise ValueError("bad peek argument %r" % n)
        nthruend = self.maxpeek - self.i
        if n <= nthruend:
            result = self.b[self.i : self.i + n]
        else:
            result = self.b[self.i:] + self.b[:n - nthruend]
        return result

q = PeekableQueue(get_tile())
Drawing random Circles in Random Locations in Random Sizes Android

Drawing random Circles in Random Locations in Random Sizes Android


By : user2514892
Date : March 29 2020, 07:55 AM
will be helpful for those in need Your random function is not effective to draw circles on the current view (most likely because you have high resolution device) you have to get with and height of the view to draw your circle on it randomly.
code :
    int minRadius = 100;
    Random random = new Random();//define this outside you onDraw fucntion 
    int w = getWidth();
    int h = getHeight();

    int randX = random.nextInt(w);
    int randY = random.nextInt(h);
    int randR = minRadius + random.nextInt(100);
    ...
    c.drawCircle(randX, randY, randR, p);
canvas.drawColor(Color.WHITLE);
Creating an object of Random class or using Math.random() in order to generate random numbers

Creating an object of Random class or using Math.random() in order to generate random numbers


By : Halbert
Date : March 29 2020, 07:55 AM
I wish this help you Math.random() uses the Random class. And it's basically calling nextDouble() on the Random object of the Math class.
However the first method is definitely easier to understand and use. And has more options then the Math class has. So I'd go with the Random class if you need a lot of Random numbers or if you need types other then double. And I'd use Math.random() when you only need a double between 0 and 1.
Shorter runtime of `random.shuffle` when using `random.random` as keyword argument in Python3

Shorter runtime of `random.shuffle` when using `random.random` as keyword argument in Python3


By : Chrysogonus
Date : March 29 2020, 07:55 AM
Any of those help The docstring in the function random.shuffle contradicts the code. In python 2.7.2+ the docstring is correct:
In Rails, how to make random events happen at random times for random users

In Rails, how to make random events happen at random times for random users


By : eoia
Date : March 29 2020, 07:55 AM
it should still fix some issue You have to create ActiveJobs and rake tasks that will fire them. Example: In app/jobs, create a share_job.rb with the following code:
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